Hi everyone,
I would like to share a project I made recently : I adapted a shorty device and added a display.
it becomes a 0.1mΩ meter with surprising stability.
the original shorty project is here : https://hackaday.io/project/3635-sho...circuit-finder
I did one showed here (http://kripton2035.free.fr/Projects/proj-shorty.html) and was pleased with its performances, but it lack a display.
here is a video showing the measuring of some small values resistors :
https://youtu.be/4F6QNSpWTos
here another video showing continuous resistance measuring along a soldier roller :
https://youtu.be/8mYyr9uKpFU
and last another video showing how to find a shorted capacitor on a 820-00165 macbook air motherboard.
fast and easy.
https://youtu.be/L4V3BWReZLY
I'm cleaning the schematic and sources, and will share it when it's ready.
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Hi all,
Recently picked up this GTX1650 at a local flea market for a low price and wanted to use it on my secondary PC. I first tested the card and saw the fan spin for a split second and then nothing. Immediately I thought of a short circuit. Disassembled and found a shorted SMD capacitor, injected voltage into it (1V/4A) and two Mosfets got hot immediately (QN3103 & QN3107). Desoldered these Mosfets and the card turned back to life.
Bought replacements from Aliexpress and replaced them afterwards. Tried the card but still the saw the fan spin for a split second... -
Hi,
First : I've got a SMD rework station, thermal camera and good soldering station
This is my first "short" motherboard repair, this laptop was 25€ so no loss, it just for learning. I want to learn how to fixed board because I want this to become my job.
I've been fixing electronics for 15+ years, but mostly VCR and camcorder.
So, I checked power adapter pin to ground, no short, then I plugged the charger in, light on charger blink indicating short.
PQ19 mosfet got HOT straight away (viewed on thermal cam). Checked,... -
Hello!
Recently I have a problem finding a dead short (as far as my cheap multimeter is concerned) on a multilayered (12 layer) PCB. It is caused due to mechanical stress (warping the board and, I assume, cracking inner layers). Injecting voltage of 0.9 V (operational voltage of that part of the circuit) and drawing 0.5 W doesn't cause any visible hotspot on a thermal camera.
Does anybody have any tips & tricks in order to locate the short more or less precisely? The area has a lot of powerplanes, so it's both blessing and a curse.
Silly idea no. 1: Can I... -
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from it, and that you please credit the author... -
Hi beginner here, so I'm not sure of I've done this right 😅 trying to diagnose my laptop's motherboard (dax31mb1aa0 rev a). I don't quite know how to read the schematic, so I'm attaching the pictures of the motherboard and the measurements.
I was attempting to measure resistance to GND on inductors. I disconnected motherboard and used "continuity testing" setting on my multimeter. I put black probe to Ground & red probe on an inductor. Did I measure this right? Am I correct to think that 0.3 ohm measurement indicates a short circuit? Thank you for your help!...