Author Topic: My bench PSU teardown  (Read 1998 times)

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Offline 3nigm4

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My bench PSU teardown
« on: January 14, 2017, 05:16:13 pm »
This is my PSU auto built when I was 16, in '90, with the PCB designed by hand with pen.
Later in '97 I've upgraded it drawing a new PCB in AutoCAD and developing with UV. Added also the digital voltmeter as a kind of switch to use the voltmeter with a secondary input (the one on the left). Changed also final transistors with mosfets.

It is based on a "Nuova Elettronica" schematic.

After many years it is still working ;D
 

Offline 3nigm4

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Re: My bench PSU teardown
« Reply #1 on: January 14, 2017, 05:18:22 pm »
The schematic of the main PCB
 

Offline kg4arn

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Re: My bench PSU teardown
« Reply #2 on: January 14, 2017, 05:27:50 pm »
Nice work!  Much better than I could have done at age 16.
 

Offline guenthert

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Re: My bench PSU teardown
« Reply #3 on: January 15, 2017, 06:37:11 pm »
What's with TR2?  In the schematic it's a PNP (as one would expect), in the list of components it's a NPN Darlington.  Which is it?
 

Offline 3nigm4

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Re: My bench PSU teardown
« Reply #4 on: January 15, 2017, 08:32:57 pm »
They have missed the right TR2 on part list: TR1 and TR2 are equals while TR2 in part listis TR3 on schematics, the one that power the relè
 

Offline 3nigm4

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Re: My bench PSU teardown
« Reply #5 on: January 15, 2017, 09:50:42 pm »
Nice work!  Much better than I could have done at age 16.
Thank you ;)
 

Online tautech

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Re: My bench PSU teardown
« Reply #6 on: January 15, 2017, 11:33:47 pm »
Hand tinned traces, right ?
Avid Rabid Hobbyist
 

Offline 3nigm4

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Re: My bench PSU teardown
« Reply #7 on: January 16, 2017, 06:11:32 am »
Hand tinned traces, right ?
As I said: the first PCB in '90 was by hand, then in '97 I redesigned the PCB in AutoCAD, the PCB you see in pictures. I don't know where is the first hand made PCB :-// ... maybe I'll trashed
 


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