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Search: Posts Made By: kripton2035
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-01-2021, 12:43 PM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

this is the actual state of the schematic of the shorty-with-display input stage.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-01-2021, 12:41 PM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

transistor is on an analog pin 3 A3, and button on a digital pin 3 D3
they are not the same pin.
anyway, the transistor is always on, and has been removed from the source code when I use the...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-30-2021, 06:52 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

I checked on a lab power supply, the whole device is now using 50-60mA.
the current constant source now is using 30mA.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-30-2021, 03:13 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

I added a voltage regulator 1755S to bypass the one inside the arduino. just thinking there would be a better regulation than the 1117. I also added a constant current source with the pnp transistor,...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-29-2021, 02:35 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

I received the pcb some times ago. but there is a failure I did not find until now.
I made some changes in the schematic, using a constant current source for better repetability,
well I'm still...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-06-2021, 12:06 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

sure !
http://kripton2035.free.fr/Projects/shorty-display.html
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-04-2021, 06:07 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

nice to see other variations around my project !

the pcb is ready to send to manufacture (for prototype and test only). should receive it in 2 weeks. then test it and if it is ok manufacture in...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-10-2021, 04:31 PM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

sorry only bare pcb for now. may be later a smd-only populated pcb if there is interest.
you should be able to get all the components for less than $20
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-10-2021, 11:04 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

@dicky96
yes I use the ad8628 in the sop-8 package for my pcb. (and the mcp3421 in sot23-6)
anyway as I will publish the kicad files (schematic and pcb) once the pcb is ok
you will be able to...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-07-2021, 05:03 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

the total compiled project size is actually around 20k, so a 128k will be more than too much.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-06-2021, 06:23 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

yes look at the freecad file some posts above
https://www.aliexpress.com/wholesale?catId=0&SearchText=arduino+nano
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-05-2021, 03:52 PM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

here is the freecad file of the imported pcb.
please note that this is not the final pcb.
have fun.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-05-2021, 12:13 PM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

the pcb is not final in size... I'm thinking of adding one pad with a 1Ω resistor to calibrate easily. but it will be defined soon. yes the oled seems difficult to put nicely into a case. I've never...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-05-2021, 12:28 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

it seems I will be able to ship a letter with a pcb inside for EUR 5 all around the world without tracking, and 8-9 EUR with tracking. more expensive than china of course but still reasonable.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-03-2021, 05:00 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

I'm making the pcb right now, then I'll have them made, then test them and if ok there will be a button to order them on the pcb tab of the web page.
but I need 1-2 months before it's available.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-02-2021, 01:26 PM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

Yes these are ok. anyway there are constants at the beginning of the source code to tell the resolution of the oled, easy to change it if needed.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-02-2021, 11:25 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

it is a standard 0.91" oled module, in a 128x32 resolution. plenty of them on ebay or ali

there will be a button on the pcb page to buy it, but please wait 1-2 months before it's available.
I...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-25-2021, 12:39 PM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

I've published the first draft of schematic and source code of the project. enjoy !
http://kripton2035.free.fr/Projects/shorty-display.html
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-23-2021, 09:14 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

this is what the big red button you can see in the videos is for ! make temporary zero, or permanent zero if you long press it is stored in the arduino eeprom.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-20-2021, 12:46 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

I use the ad8628 in replacement of the original mcp6041 aop
and I use a mcp3421 as an adc after the ad8628 and before the arduino.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-19-2021, 12:32 PM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

yes
https://www.analog.com/en/products/ad8628.html
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-19-2021, 11:31 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

I also changed the aop, from a mcp6041 to a ad8628
the mcp had too much voltage offset, and I losed a lot of low mΩ resolution with it
the ad8628 is perfect with 1V offset.

not sure you also...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-19-2021, 09:52 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

the shorty original is open sourced, so I really can't make mine a closed design.
by the way, there is nothing complicated on this design, just add a display and a better adc on a shorty.
I even...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-18-2021, 11:56 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-18-2021, 11:54 AM
Replies: 124
Views: 16,034
Posted By kripton2035
Re: New tool to find short capacitors on motherboards : shorty with display

you must have 4-wires probe or you won't get the reading stability like on the video.
Showing results 1 to 25 of 31

 
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