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realsync1 asked How to test electronics without power adapter.?
Is there anyway to test electronics when you don't have a power adapter. I buy used stuff at goodwill and they usually don't have a power adapter. I need something to test that product before i sell it on Ebay. I need something that will test old SLR cameras, Xbox 360, etc. Can you do it with a Multimeter. I bought a PSU to test car cd players, Power amps and speakers. I find really expensive electronics at goodwill for really cheap and most of them don't come with a power adapter and i need something that will test them if they work or not.
And got the following answer:
A multimeter can do lots of different tests, but it isn't the only piece of test gear one would need. It would be worthwhile only if you plan on actually repairing the items that are inexpensive to fix. A power supply is needed here and I can recommend two that will cover a lot of items. The links for them are here: http://www.walmart.com/ip/PowerLine-600-mah-Universal-AC-Adapter/16778838?action=product_interest&action_type=title&placement_id=irs_middle&strategy=PWVUB&visitor_id=53219820649&category=0%3A1105910%3A133161%3A1072306&client_guid=4c55c787-d55e-4c23-bfd7-e0c992c797a7&config_id=0&parent_item_id=16778839&guid=2b5560f0-ae4f-422c-886c-0eacaac707e5&bucket_id=000&findingMethod=p13n http://www.walmart.com/ip/PowerLine-1300-mah-Universal-AC-Adapter-w-USB-Power-Port/16778839 These have one major difference that recommends the investment at some point in both, the maximum current ratings of each. One has 600 mA maximum which is best to use on electronics that require lower than about a half amp current and are in unknown condition. If there is a short, by matching the current requirements as closely as possible, you minimize further damage and possible fire hazard at the bench. The other is more powerful at a full 1.3 amps and could be used on items below that rating if they are in good condition. Don't forget to switch the voltage and don't forget to find the polarity as well as match the tip for correct size. For certain items, you may at some point want to invest in a variable voltage / current power supply such as an electronics repair shop or lab would use. These are available, but not inexpensively and typically will adjust both voltage and current in a range from 1.5 to about 30 V DC and from 100 mA to a full 3 amps. They can be found through suppliers like Jameco, Mouser and Digi-Key. I hope that this will help you out a bit with the power issue, though some items will be out of reach of this solution. When dealing with electronics for sale, it might be a good idea to learn some basics to make simple repairs or team up with a talented hobbyist for a small cut of the take on items that they repair. Just some ideas to think about. Good luck!