Gentlemen,
I never ceases to amaze me that for all I've learned about the theory
side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when
the soil moisture fell below a certain amount. I've got 240V/10A wires juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component
lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards.
Now you might say, "Well, it's only a prototype, CD; it's not as if
you were going to actually use this thing as it stands" to which I'd
have to confess that was indeed my intention! Appalling, isn't it?
On 1/26/2025 5:29 AM, Cursitor Doom wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory
side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when
the soil moisture fell below a certain amount. I've got 240V/10A wires
juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component
lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards.
Now you might say, "Well, it's only a prototype, CD; it's not as if
you were going to actually use this thing as it stands" to which I'd
have to confess that was indeed my intention! Appalling, isn't it?
No. The uglier it is, the better it works.
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory
side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when
the soil moisture fell below a certain amount. I've got 240V/10A wires >juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component
lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards.
On 1/26/2025 5:29 AM, Cursitor Doom wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory
side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when
the soil moisture fell below a certain amount. I've got 240V/10A wires
juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component
lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards.
Now you might say, "Well, it's only a prototype, CD; it's not as if
you were going to actually use this thing as it stands" to which I'd
have to confess that was indeed my intention! Appalling, isn't it?
No. The uglier it is, the better it works.
On Sun, 26 Jan 2025 11:29:00 +0000, Cursitor Doom <[email protected]>
wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory
side of electronics over the years, my construction skills have not >>improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when
the soil moisture fell below a certain amount. I've got 240V/10A wires >>juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component
lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards.
Works for me.
https://www.dropbox.com/scl/fi/kmjfxcvsix8fwmcyy6map/T840_E1.jpg?rlkey=tbvmyna46bkfxc3lc6a6yv64q&raw=1
On Sun, 26 Jan 2025 11:07:14 -0600, John S <[email protected]>
wrote:
On 1/26/2025 5:29 AM, Cursitor Doom wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory
side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when
the soil moisture fell below a certain amount. I've got 240V/10A wires
juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component
lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards.
Now you might say, "Well, it's only a prototype, CD; it's not as if
you were going to actually use this thing as it stands" to which I'd
have to confess that was indeed my intention! Appalling, isn't it?
No. The uglier it is, the better it works.
I disagree. Pretty protos and pcb's and schematics work better, for
some very good reasons.
https://www.dropbox.com/scl/fi/t7vpf7auh650b2qjfgnk8/D200_BB_4.JPG?rlkey=92oe1louvcpeh91ept0n1w616&raw=1
https://www.dropbox.com/scl/fi/g27cv9ifg6gwkxphjz4ox/LDP2.JPG?rlkey=0z4y8cge3fg0xwft3hcz329x2&raw=1
https://www.dropbox.com/scl/fi/ydvcds95zvzjq56bzeimr/Z412_Proto.JPG?rlkey=hyejukxbbnk3573engf0if4zt&raw=1
On 1/26/2025 5:29 AM, Cursitor Doom wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory
side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when
the soil moisture fell below a certain amount. I've got 240V/10A wires
juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component
lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards.
Now you might say, "Well, it's only a prototype, CD; it's not as if
you were going to actually use this thing as it stands" to which I'd
have to confess that was indeed my intention! Appalling, isn't it?
No. The uglier it is, the better it works.
On Sun, 26 Jan 2025 09:45:45 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:07:14 -0600, John S <[email protected]>
wrote:
On 1/26/2025 5:29 AM, Cursitor Doom wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory
side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>> the soil moisture fell below a certain amount. I've got 240V/10A wires >>>> juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component >>>> lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards. >>>> Now you might say, "Well, it's only a prototype, CD; it's not as if
you were going to actually use this thing as it stands" to which I'd
have to confess that was indeed my intention! Appalling, isn't it?
No. The uglier it is, the better it works.
I disagree. Pretty protos and pcb's and schematics work better, for
some very good reasons.
https://www.dropbox.com/scl/fi/t7vpf7auh650b2qjfgnk8/D200_BB_4.JPG?rlkey=92oe1louvcpeh91ept0n1w616&raw=1
https://www.dropbox.com/scl/fi/g27cv9ifg6gwkxphjz4ox/LDP2.JPG?rlkey=0z4y8cge3fg0xwft3hcz329x2&raw=1
https://www.dropbox.com/scl/fi/ydvcds95zvzjq56bzeimr/Z412_Proto.JPG?rlkey=hyejukxbbnk3573engf0if4zt&raw=1
Your Dremmeling has improved no end.
That board referenced by your middle link above: what frequency is it >intended for?
On Sun, 26 Jan 2025 09:56:43 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:29:00 +0000, Cursitor Doom <[email protected]> >>wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory >>>side of electronics over the years, my construction skills have not >>>improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>the soil moisture fell below a certain amount. I've got 240V/10A wires >>>juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component >>>lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D >>>apples with insects etc is of no help whatsoever in laying out boards.
Works for me.
https://www.dropbox.com/scl/fi/kmjfxcvsix8fwmcyy6map/T840_E1.jpg?rlkey=tbvmyna46bkfxc3lc6a6yv64q&raw=1
Sorry - what exactly works for you?
Are you saying you can visualize
*and* layout a board?
Or are you saying this board has 240VAC in
places with high currents? Or both?!
On Sun, 26 Jan 2025 18:17:44 +0000, Cursitor Doom <[email protected]>
wrote:
On Sun, 26 Jan 2025 09:56:43 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:29:00 +0000, Cursitor Doom <[email protected]>
wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory
side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>> the soil moisture fell below a certain amount. I've got 240V/10A wires >>>> juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component >>>> lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards.
Works for me.
https://www.dropbox.com/scl/fi/kmjfxcvsix8fwmcyy6map/T840_E1.jpg?rlkey=tbvmyna46bkfxc3lc6a6yv64q&raw=1
Sorry - what exactly works for you?
Visualizing the schematic and the layout and making both as beautiful
as possible. Beautiful things work better.
Are you saying you can visualize
*and* layout a board?
Certainly. PCB layout is fun, like a 3D color chess game. But it's so
labor intensive that I delegate most layouts. I do a few critical
ones, like picosecond stuff, because it's harder to explain to someone
else than it is to just do it.
Or are you saying this board has 240VAC in
places with high currents? Or both?!
The T840 makes 1200 volt pulses. There's no AC involved. It's powered
by 24 VDC.
On 1/27/2025 4:38 PM, john larkin wrote:
On Sun, 26 Jan 2025 18:17:44 +0000, Cursitor Doom <[email protected]>
wrote:
On Sun, 26 Jan 2025 09:56:43 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:29:00 +0000, Cursitor Doom <[email protected]>
wrote:
Gentlemen,Works for me.
I never ceases to amaze me that for all I've learned about the theory >>>>> side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>>> the soil moisture fell below a certain amount. I've got 240V/10A wires >>>>> juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component >>>>> lead ends close to shorting out. It's obvious I've paid scant regard >>>>> to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards. >>>>
https://www.dropbox.com/scl/fi/kmjfxcvsix8fwmcyy6map/T840_E1.jpg?rlkey=tbvmyna46bkfxc3lc6a6yv64q&raw=1
Sorry - what exactly works for you?
Visualizing the schematic and the layout and making both as beautiful
as possible. Beautiful things work better.
I noticed that if you turn the Highland Technology logo sideways it
looks kind of like a lady with three boobs.
On Sun, 26 Jan 2025 18:29:58 +0000, Cursitor Doom <[email protected]>
wrote:
On Sun, 26 Jan 2025 09:45:45 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:07:14 -0600, John S <[email protected]>
wrote:
On 1/26/2025 5:29 AM, Cursitor Doom wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory >>>>> side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>>> the soil moisture fell below a certain amount. I've got 240V/10A wires >>>>> juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component >>>>> lead ends close to shorting out. It's obvious I've paid scant regard >>>>> to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards. >>>>> Now you might say, "Well, it's only a prototype, CD; it's not as if
you were going to actually use this thing as it stands" to which I'd >>>>> have to confess that was indeed my intention! Appalling, isn't it?
No. The uglier it is, the better it works.
I disagree. Pretty protos and pcb's and schematics work better, for
some very good reasons.
https://www.dropbox.com/scl/fi/t7vpf7auh650b2qjfgnk8/D200_BB_4.JPG?rlkey=92oe1louvcpeh91ept0n1w616&raw=1
https://www.dropbox.com/scl/fi/g27cv9ifg6gwkxphjz4ox/LDP2.JPG?rlkey=0z4y8cge3fg0xwft3hcz329x2&raw=1
https://www.dropbox.com/scl/fi/ydvcds95zvzjq56bzeimr/Z412_Proto.JPG?rlkey=hyejukxbbnk3573engf0if4zt&raw=1
Your Dremmeling has improved no end.
Carbide dental burrs, Mantis, lots of practice.
That board referenced by your middle link above: what frequency is it >>intended for?
That was hundred-amp microsecond stuff. I did that mostly to test some
parts to destruction.
On Mon, 27 Jan 2025 13:25:25 -0800, john larkin <[email protected]>
wrote:
On Sun, 26 Jan 2025 18:29:58 +0000, Cursitor Doom <[email protected]> >>wrote:
On Sun, 26 Jan 2025 09:45:45 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:07:14 -0600, John S <[email protected]>
wrote:
On 1/26/2025 5:29 AM, Cursitor Doom wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory >>>>>> side of electronics over the years, my construction skills have not >>>>>> improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>>>> the soil moisture fell below a certain amount. I've got 240V/10A wires >>>>>> juxtaposed next to low voltage signal interconnects and components >>>>>> with the insulation smeared through by careless use of a soldering >>>>>> iron all secured with blobs of hot melt glue and many of the component >>>>>> lead ends close to shorting out. It's obvious I've paid scant regard >>>>>> to layout considerations as you can tell. I'm posting this so John >>>>>> Larkin can see for himself that having the ability to visualize 3-D >>>>>> apples with insects etc is of no help whatsoever in laying out boards. >>>>>> Now you might say, "Well, it's only a prototype, CD; it's not as if >>>>>> you were going to actually use this thing as it stands" to which I'd >>>>>> have to confess that was indeed my intention! Appalling, isn't it?
No. The uglier it is, the better it works.
I disagree. Pretty protos and pcb's and schematics work better, for >>>>some very good reasons.
https://www.dropbox.com/scl/fi/t7vpf7auh650b2qjfgnk8/D200_BB_4.JPG?rlkey=92oe1louvcpeh91ept0n1w616&raw=1
https://www.dropbox.com/scl/fi/g27cv9ifg6gwkxphjz4ox/LDP2.JPG?rlkey=0z4y8cge3fg0xwft3hcz329x2&raw=1
https://www.dropbox.com/scl/fi/ydvcds95zvzjq56bzeimr/Z412_Proto.JPG?rlkey=hyejukxbbnk3573engf0if4zt&raw=1
Your Dremmeling has improved no end.
Carbide dental burrs, Mantis, lots of practice.
There's a 'pen' type extension tool you can get which improves control
no end. Uses a flexible cable with a steel wire inside to convey the
drive from the dremmel. So it's like holding a Sharpie rather than a
bulky lump with a motor in it.
That board referenced by your middle link above: what frequency is it >>>intended for?
That was hundred-amp microsecond stuff. I did that mostly to test some >>parts to destruction.
Using those slender wires and SMB connectors? I know you can get away
with thin stuff for short durations of high current over short
distances, but how did you know your arrangement was good for that
much current?
On 1/27/2025 4:38 PM, john larkin wrote:
On Sun, 26 Jan 2025 18:17:44 +0000, Cursitor Doom <[email protected]>
wrote:
On Sun, 26 Jan 2025 09:56:43 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:29:00 +0000, Cursitor Doom <[email protected]>
wrote:
Gentlemen,Works for me.
I never ceases to amaze me that for all I've learned about the theory >>>>> side of electronics over the years, my construction skills have not
improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>>> the soil moisture fell below a certain amount. I've got 240V/10A wires >>>>> juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component >>>>> lead ends close to shorting out. It's obvious I've paid scant regard >>>>> to layout considerations as you can tell. I'm posting this so John
Larkin can see for himself that having the ability to visualize 3-D
apples with insects etc is of no help whatsoever in laying out boards. >>>>
https://www.dropbox.com/scl/fi/kmjfxcvsix8fwmcyy6map/T840_E1.jpg?rlkey=tbvmyna46bkfxc3lc6a6yv64q&raw=1
Sorry - what exactly works for you?
Visualizing the schematic and the layout and making both as beautiful
as possible. Beautiful things work better.
I noticed that if you turn the Highland Technology logo sideways it
looks kind of like a lady with three boobs.
On Sun, 26 Jan 2025 18:17:44 +0000, Cursitor Doom <[email protected]>
wrote:
On Sun, 26 Jan 2025 09:56:43 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:29:00 +0000, Cursitor Doom <[email protected]> >>>wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory >>>>side of electronics over the years, my construction skills have not >>>>improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>>the soil moisture fell below a certain amount. I've got 240V/10A wires >>>>juxtaposed next to low voltage signal interconnects and components
with the insulation smeared through by careless use of a soldering
iron all secured with blobs of hot melt glue and many of the component >>>>lead ends close to shorting out. It's obvious I've paid scant regard
to layout considerations as you can tell. I'm posting this so John >>>>Larkin can see for himself that having the ability to visualize 3-D >>>>apples with insects etc is of no help whatsoever in laying out boards.
Works for me.
https://www.dropbox.com/scl/fi/kmjfxcvsix8fwmcyy6map/T840_E1.jpg?rlkey=tbvmyna46bkfxc3lc6a6yv64q&raw=1
Sorry - what exactly works for you?
Visualizing the schematic and the layout and making both as beautiful
as possible. Beautiful things work better.
Are you saying you can visualize
*and* layout a board?
Certainly. PCB layout is fun, like a 3D color chess game. But it's so
labor intensive that I delegate most layouts. I do a few critical
ones, like picosecond stuff, because it's harder to explain to someone
else than it is to just do it.
Or are you saying this board has 240VAC in
places with high currents? Or both?!
The T840 makes 1200 volt pulses. There's no AC involved. It's powered
by 24 VDC.
On Mon, 27 Jan 2025 13:38:21 -0800, john larkin <[email protected]>
wrote:
On Sun, 26 Jan 2025 18:17:44 +0000, Cursitor Doom <[email protected]> >>wrote:
On Sun, 26 Jan 2025 09:56:43 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:29:00 +0000, Cursitor Doom <[email protected]> >>>>wrote:
Gentlemen,Works for me.
I never ceases to amaze me that for all I've learned about the theory >>>>>side of electronics over the years, my construction skills have not >>>>>improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>>>the soil moisture fell below a certain amount. I've got 240V/10A wires >>>>>juxtaposed next to low voltage signal interconnects and components >>>>>with the insulation smeared through by careless use of a soldering >>>>>iron all secured with blobs of hot melt glue and many of the component >>>>>lead ends close to shorting out. It's obvious I've paid scant regard >>>>>to layout considerations as you can tell. I'm posting this so John >>>>>Larkin can see for himself that having the ability to visualize 3-D >>>>>apples with insects etc is of no help whatsoever in laying out boards. >>>>
https://www.dropbox.com/scl/fi/kmjfxcvsix8fwmcyy6map/T840_E1.jpg?rlkey=tbvmyna46bkfxc3lc6a6yv64q&raw=1
Sorry - what exactly works for you?
Visualizing the schematic and the layout and making both as beautiful
as possible. Beautiful things work better.
I might as well give up and start collecting stamps instead, then.
Are you saying you can visualize
*and* layout a board?
Certainly. PCB layout is fun, like a 3D color chess game. But it's so
labor intensive that I delegate most layouts. I do a few critical
ones, like picosecond stuff, because it's harder to explain to someone
else than it is to just do it.
OK, I got the impression from a previous question you posted that YOU
were unable to visualise and wanted to know if anyone on the group who
COULD was also good at laying out boards. I can and I'm not!
Or are you saying this board has 240VAC in
places with high currents? Or both?!
The T840 makes 1200 volt pulses. There's no AC involved. It's powered
by 24 VDC.
And this is all for testing to destruction? Why not just accept the
'maximum' figures on the datasheet?
On Wed, 29 Jan 2025 18:20:50 +0000, Cursitor Doom <[email protected]>
wrote:
On Mon, 27 Jan 2025 13:25:25 -0800, john larkin <[email protected]> >>wrote:
On Sun, 26 Jan 2025 18:29:58 +0000, Cursitor Doom <[email protected]> >>>wrote:
On Sun, 26 Jan 2025 09:45:45 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:07:14 -0600, John S <[email protected]> >>>>>wrote:
On 1/26/2025 5:29 AM, Cursitor Doom wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory >>>>>>> side of electronics over the years, my construction skills have not >>>>>>> improved one iota since I was about 10 years old. Case in point: >>>>>>>
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>>>>> the soil moisture fell below a certain amount. I've got 240V/10A wires >>>>>>> juxtaposed next to low voltage signal interconnects and components >>>>>>> with the insulation smeared through by careless use of a soldering >>>>>>> iron all secured with blobs of hot melt glue and many of the component >>>>>>> lead ends close to shorting out. It's obvious I've paid scant regard >>>>>>> to layout considerations as you can tell. I'm posting this so John >>>>>>> Larkin can see for himself that having the ability to visualize 3-D >>>>>>> apples with insects etc is of no help whatsoever in laying out boards. >>>>>>> Now you might say, "Well, it's only a prototype, CD; it's not as if >>>>>>> you were going to actually use this thing as it stands" to which I'd >>>>>>> have to confess that was indeed my intention! Appalling, isn't it? >>>>>>
No. The uglier it is, the better it works.
I disagree. Pretty protos and pcb's and schematics work better, for >>>>>some very good reasons.
https://www.dropbox.com/scl/fi/t7vpf7auh650b2qjfgnk8/D200_BB_4.JPG?rlkey=92oe1louvcpeh91ept0n1w616&raw=1
https://www.dropbox.com/scl/fi/g27cv9ifg6gwkxphjz4ox/LDP2.JPG?rlkey=0z4y8cge3fg0xwft3hcz329x2&raw=1
https://www.dropbox.com/scl/fi/ydvcds95zvzjq56bzeimr/Z412_Proto.JPG?rlkey=hyejukxbbnk3573engf0if4zt&raw=1
Your Dremmeling has improved no end.
Carbide dental burrs, Mantis, lots of practice.
There's a 'pen' type extension tool you can get which improves control
no end. Uses a flexible cable with a steel wire inside to convey the
drive from the dremmel. So it's like holding a Sharpie rather than a
bulky lump with a motor in it.
That board referenced by your middle link above: what frequency is it >>>>intended for?
That was hundred-amp microsecond stuff. I did that mostly to test some >>>parts to destruction.
Using those slender wires and SMB connectors? I know you can get away
with thin stuff for short durations of high current over short
distances, but how did you know your arrangement was good for that
much current?
The wires are gate drive and current monitor.
The circuit should be obvious. Two black things are TVS diodes.
On Wed, 29 Jan 2025 18:25:36 +0000, Cursitor Doom <[email protected]>
wrote:
On Mon, 27 Jan 2025 13:38:21 -0800, john larkin <[email protected]> >>wrote:
On Sun, 26 Jan 2025 18:17:44 +0000, Cursitor Doom <[email protected]> >>>wrote:
On Sun, 26 Jan 2025 09:56:43 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:29:00 +0000, Cursitor Doom <[email protected]> >>>>>wrote:
Gentlemen,Works for me.
I never ceases to amaze me that for all I've learned about the theory >>>>>>side of electronics over the years, my construction skills have not >>>>>>improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>>>>the soil moisture fell below a certain amount. I've got 240V/10A wires >>>>>>juxtaposed next to low voltage signal interconnects and components >>>>>>with the insulation smeared through by careless use of a soldering >>>>>>iron all secured with blobs of hot melt glue and many of the component >>>>>>lead ends close to shorting out. It's obvious I've paid scant regard >>>>>>to layout considerations as you can tell. I'm posting this so John >>>>>>Larkin can see for himself that having the ability to visualize 3-D >>>>>>apples with insects etc is of no help whatsoever in laying out boards. >>>>>
https://www.dropbox.com/scl/fi/kmjfxcvsix8fwmcyy6map/T840_E1.jpg?rlkey=tbvmyna46bkfxc3lc6a6yv64q&raw=1
Sorry - what exactly works for you?
Visualizing the schematic and the layout and making both as beautiful
as possible. Beautiful things work better.
I might as well give up and start collecting stamps instead, then.
Are you saying you can visualize
*and* layout a board?
Certainly. PCB layout is fun, like a 3D color chess game. But it's so >>>labor intensive that I delegate most layouts. I do a few critical
ones, like picosecond stuff, because it's harder to explain to someone >>>else than it is to just do it.
OK, I got the impression from a previous question you posted that YOU
were unable to visualise and wanted to know if anyone on the group who >>COULD was also good at laying out boards. I can and I'm not!
I see mechanical things in my head, and schematics with waveforms and
current flowing around. But some people, including programmers, don't >visualize objects. People are very different.
I don't write a lot of software, but if I do I draw a diagram to plan
it. State machines with lots of GOTO's.
Or are you saying this board has 240VAC in
places with high currents? Or both?!
The T840 makes 1200 volt pulses. There's no AC involved. It's powered
by 24 VDC.
And this is all for testing to destruction? Why not just accept the >>'maximum' figures on the datasheet?
The T840 is a real product for a real application. Nothing needed to
be tested for that one. It is a pretty board.
We assign Z series drawing numbers to experiments, which are sometimes >dremeled and sometimes a proto PCB. Either way, we document the
hardware and the results.
Data sheet maximums need not always be believed. You get performance
by pushing parts.
Mosfet avalanche ratings are especially fuzzy. As are RF part
voltages.
On Wed, 29 Jan 2025 15:34:26 -0800, john larkin <[email protected]>
wrote:
On Wed, 29 Jan 2025 18:25:36 +0000, Cursitor Doom <[email protected]> >>wrote:
On Mon, 27 Jan 2025 13:38:21 -0800, john larkin <[email protected]> >>>wrote:
On Sun, 26 Jan 2025 18:17:44 +0000, Cursitor Doom <[email protected]> >>>>wrote:
On Sun, 26 Jan 2025 09:56:43 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:29:00 +0000, Cursitor Doom <[email protected]> >>>>>>wrote:
Gentlemen,Works for me.
I never ceases to amaze me that for all I've learned about the theory >>>>>>>side of electronics over the years, my construction skills have not >>>>>>>improved one iota since I was about 10 years old. Case in point:
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>>>>>the soil moisture fell below a certain amount. I've got 240V/10A wires >>>>>>>juxtaposed next to low voltage signal interconnects and components >>>>>>>with the insulation smeared through by careless use of a soldering >>>>>>>iron all secured with blobs of hot melt glue and many of the component >>>>>>>lead ends close to shorting out. It's obvious I've paid scant regard >>>>>>>to layout considerations as you can tell. I'm posting this so John >>>>>>>Larkin can see for himself that having the ability to visualize 3-D >>>>>>>apples with insects etc is of no help whatsoever in laying out boards. >>>>>>
https://www.dropbox.com/scl/fi/kmjfxcvsix8fwmcyy6map/T840_E1.jpg?rlkey=tbvmyna46bkfxc3lc6a6yv64q&raw=1
Sorry - what exactly works for you?
Visualizing the schematic and the layout and making both as beautiful >>>>as possible. Beautiful things work better.
I might as well give up and start collecting stamps instead, then.
Are you saying you can visualize
*and* layout a board?
Certainly. PCB layout is fun, like a 3D color chess game. But it's so >>>>labor intensive that I delegate most layouts. I do a few critical
ones, like picosecond stuff, because it's harder to explain to someone >>>>else than it is to just do it.
OK, I got the impression from a previous question you posted that YOU >>>were unable to visualise and wanted to know if anyone on the group who >>>COULD was also good at laying out boards. I can and I'm not!
I see mechanical things in my head, and schematics with waveforms and >>current flowing around. But some people, including programmers, don't >>visualize objects. People are very different.
I don't write a lot of software, but if I do I draw a diagram to plan
it. State machines with lots of GOTO's.
You state that like it's a virtue!
On Wed, 29 Jan 2025 10:31:08 -0800, john larkin <[email protected]>
wrote:
On Wed, 29 Jan 2025 18:20:50 +0000, Cursitor Doom <[email protected]> >>wrote:
On Mon, 27 Jan 2025 13:25:25 -0800, john larkin <[email protected]> >>>wrote:
On Sun, 26 Jan 2025 18:29:58 +0000, Cursitor Doom <[email protected]> >>>>wrote:
On Sun, 26 Jan 2025 09:45:45 -0800, john larkin <[email protected]> wrote:
On Sun, 26 Jan 2025 11:07:14 -0600, John S <[email protected]> >>>>>>wrote:
On 1/26/2025 5:29 AM, Cursitor Doom wrote:
Gentlemen,
I never ceases to amaze me that for all I've learned about the theory >>>>>>>> side of electronics over the years, my construction skills have not >>>>>>>> improved one iota since I was about 10 years old. Case in point: >>>>>>>>
https://disk.yandex.com/i/zGA2slnrNWqGjQ
I cobbled this board up to automatically turn on the water supply when >>>>>>>> the soil moisture fell below a certain amount. I've got 240V/10A wires >>>>>>>> juxtaposed next to low voltage signal interconnects and components >>>>>>>> with the insulation smeared through by careless use of a soldering >>>>>>>> iron all secured with blobs of hot melt glue and many of the component >>>>>>>> lead ends close to shorting out. It's obvious I've paid scant regard >>>>>>>> to layout considerations as you can tell. I'm posting this so John >>>>>>>> Larkin can see for himself that having the ability to visualize 3-D >>>>>>>> apples with insects etc is of no help whatsoever in laying out boards. >>>>>>>> Now you might say, "Well, it's only a prototype, CD; it's not as if >>>>>>>> you were going to actually use this thing as it stands" to which I'd >>>>>>>> have to confess that was indeed my intention! Appalling, isn't it? >>>>>>>
No. The uglier it is, the better it works.
I disagree. Pretty protos and pcb's and schematics work better, for >>>>>>some very good reasons.
https://www.dropbox.com/scl/fi/t7vpf7auh650b2qjfgnk8/D200_BB_4.JPG?rlkey=92oe1louvcpeh91ept0n1w616&raw=1
https://www.dropbox.com/scl/fi/g27cv9ifg6gwkxphjz4ox/LDP2.JPG?rlkey=0z4y8cge3fg0xwft3hcz329x2&raw=1
https://www.dropbox.com/scl/fi/ydvcds95zvzjq56bzeimr/Z412_Proto.JPG?rlkey=hyejukxbbnk3573engf0if4zt&raw=1
Your Dremmeling has improved no end.
Carbide dental burrs, Mantis, lots of practice.
There's a 'pen' type extension tool you can get which improves control
no end. Uses a flexible cable with a steel wire inside to convey the >>>drive from the dremmel. So it's like holding a Sharpie rather than a >>>bulky lump with a motor in it.
That board referenced by your middle link above: what frequency is it >>>>>intended for?
That was hundred-amp microsecond stuff. I did that mostly to test some >>>>parts to destruction.
Using those slender wires and SMB connectors? I know you can get away >>>with thin stuff for short durations of high current over short
distances, but how did you know your arrangement was good for that
much current?
The wires are gate drive and current monitor.
The circuit should be obvious. Two black things are TVS diodes.
Why obvious? Were we expected to look up the datasheets from the
numbers on the chips in the photo and 'reverse engineer' a schematic?
Forgive me if I'm missing something here - it has been known! :-)
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