| Electronics > Beginners |
| cheap chinese adjustable lab power supply kit on ebay ( 3AG1 , xiaolin ) |
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| Axel1973:
Hi everyone, since its dirt cheap and i wanted to upcycle some very old crappy linear fixed voltage power supply a little bit i recently bought this kit from an ebay seller: https://www.ebay.de/itm/172830484802 i thought, for this price i cant do anything wrong really. but still i was expecting at least "some grade" of an professional trader or supplier, offering some proper schematics, a bill of material incl. all names, specs etc. to download. but no. all they provide are crappy low resolution screenshots/web graphics some poor chinese guy just googled and downloaded from somewhere and the low rez product photos they have on the ebay site. no building , calibration or ANY instructions or manual at all. The PCB and the cheap arse schematics they googled for me mentioned a "design by 3ag1" , xiaolon and two date codes: 20170510 on the pcb top side, 20150520 on the pcb bottom side. for later documentation purposes i scanned the two sided pcb with a flatbed scanner in high res color. files are very large (50+ MB a side), so i cant upload them here in the original form. therefor here are two heavily downsized versions of the pcb + the schematics they provided. im not sure if this schematic does match the pcb. didnt checked it yet. i hoped to find some good documentations / hight res schematics , manuals , bom or further material on this kit, but yet failed to find anything. Does anyone here knows this kit too and does have additional documentation or "heads up" to it ? |
| Axel1973:
oh yeah, not to mention that the product description is AWFUL !!! im no english speaker, so having trouble understanding proper english sometimes. but this nonsense-chinglish ??!??! that is why im looking for better documentation material in the first place. regards Axel |
| Old Printer:
From the pictures in the listing it looks pretty straight forward, assuming they are the same. As you have not checked that yet, that would be a good place to start. For $10 I doubt there is much more available. If you have a specific question you will probably find some help if you can learn how to post a good picture. Match up the components with the picture and work your way through. Double check before soldering. If it is beyond your skills right now, put it away until you are ready. |
| Axel1973:
this is what i have got so far (low res only) |
| voltlog:
I also got this power supply recently and it will be featured in my next InTheMail video. I was doing a bit of research with the info found on the PCB to find out the original source of the schematic and maybe learn more about this power supply but this thread which was created the day before was all the relevant info I found :) Anyway I will be assembling this unit in an upcoming video. |
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