Hello, I did manage to kill my cheap-ish bench supply causing it to randomly output up to like 300% the set voltage when under load which did already kill one board. Probably I didn’t actively kill it but the chinesium did its job 🤷🏻♂️. It was a single output supply, when needed I hooked up additional buck- or...
i like those triple supplies from rigol. its much like the siglent you posted, but the 3rd channel is not fixed. its also fairly easy to script it with python. dp800 series.
pressfit connections usually are very reliable. if there is a poor connection i would presume that the barrel of the via is broken and a new pressfit connector will not help. maybe putting solder in would help. did you already test for poor connections?
yes i think so, but u would have to make sure the solder will rise through the through-hole as mich as possible. maybe u can try to find the faulty pin with wiggling them separately
If I wanted to make a USB desk fan from a spare CPU fan (input: 12V, 0.15A), could I just solder a resistor to the positive lead of the USB wire? I plan on getting an adjustable voltage booster, but I was curious if this was possible. I think I would need a 13 ohm resistor for USB 3.0.
usually fans have a min start voltage. u can try if your fan starts at 5v and if the resulting RPM is ok for you, just solder it without any resistor on USB
I’ve been looking for a simple low-voltage cutoff circuit for a 12v SLA battery, but many of the ones I find have reviews saying that the protection circuit itself drains the battery slowly as well. Is this just inherent in the design, where it has to draw a little to measure the voltage, or are there low-voltage cutoffs that...
i assume its measured under laboratory conditions, so it seems ok to me. TCXO, OCXO should usually be operated within their operating voltage range. depends on type. usually i would assume 1.8-3.3v, but who knows without datasheet?
i can’t find ANYWHERE this ic chip, not even in chinese online stores. code is FMM862, laptop model is a Gateway GWTN141-10. it can also be another one that works. thanks in advance....
I've been watching a couple of YouTube videos doing component-level repair. I've noticed some of them have super fine multimeter probes, often with insulation covering most of the length of the probe. I haven't found ones like this on my usual sites, but I'm not sure if I'm just missing something. Can anyone suggest some meter...
https://sensepeek.com/ do manufactur those nice PCBite SP10 probes. New improved series: SQ10 probes. They also have 500MHz Oscilloscope probes! They are awesome :D
What’s up with the terrifying creepers in the background (lemmy.sdf.org)
Is there something like c/dadmemes? (lemmy.world)
What now? (lemmy.world)
I need a new bench power supply
Hello, I did manage to kill my cheap-ish bench supply causing it to randomly output up to like 300% the set voltage when under load which did already kill one board. Probably I didn’t actively kill it but the chinesium did its job 🤷🏻♂️. It was a single output supply, when needed I hooked up additional buck- or...
How to remove press fit connectors (discuss.tchncs.de)
I’m trying to repair an arcade PCB with intermittent audio. The board on top is the audio board, the bottom board is the everything else....
Making a USB desk fan from spare CPU fan
If I wanted to make a USB desk fan from a spare CPU fan (input: 12V, 0.15A), could I just solder a resistor to the positive lead of the USB wire? I plan on getting an adjustable voltage booster, but I was curious if this was possible. I think I would need a 13 ohm resistor for USB 3.0.
Can anyone here recommend a good, simple 12v low-voltage cutoff?
I’ve been looking for a simple low-voltage cutoff circuit for a 12v SLA battery, but many of the ones I find have reviews saying that the protection circuit itself drains the battery slowly as well. Is this just inherent in the design, where it has to draw a little to measure the voltage, or are there low-voltage cutoffs that...
Did I damage my crystal? (discuss.tchncs.de)
I bought a random cheap crystal oscillator off AliX. It was advertised as a “constant temperature crystal reference”....
can someone please help me find this IC charger pump? (discuss.tchncs.de)
i can’t find ANYWHERE this ic chip, not even in chinese online stores. code is FMM862, laptop model is a Gateway GWTN141-10. it can also be another one that works. thanks in advance....
Ultra-Fine Multimeter Probes
I've been watching a couple of YouTube videos doing component-level repair. I've noticed some of them have super fine multimeter probes, often with insulation covering most of the length of the probe. I haven't found ones like this on my usual sites, but I'm not sure if I'm just missing something. Can anyone suggest some meter...