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    12v 1A automatic charger fault, loud buzzing from transformer.

    Hey guys, bought a 12v 1 amp automatic sealed lead acid battery charger yesterday for a project, cut mains plug off and alligator clips off and hardwired it into a project, left in original case. It worked fine for about 10 minutes and a loud buzzing started. I unplugged it and it stopped...
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    need a thermal fan controller for noisy power supply fan

    Hey guys I have a 13.8 volt, 12 amp power supply in my room running a car stereo hooked to the PC, The fan that was in it failed (50mm) so I swapped it for a new one and it is much noisier than the old one, its still a 50mm, but is a little thicker than the old one and seems to move more air. A...
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    audio circuit to say "Wikommen" once when car ignition turned on

    yeah the amp has low level inputs available, as we are using the hi level inputs from the factory head unit. We can just feed it in there
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    audio circuit to say "Wikommen" once when car ignition turned on

    hey guys, a friend just bought a BMW, we just fitted 4 new speakers and an amplifier, but for fun he wants a circuit that will play a recording of the word Wilkommen (Welcome in German) through the system when the ignition is turned on. I guess i need to rig up some sort of circuit that will...
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    running 12v ac device on 12v dc

    Hey guys I'm building a portable music desk which runs off of an optima yellow top car battery. Problem is my mixer has a 12v AC input from a plugpack transformer (wall-wart to the US). I was wondering if running 12v dc straight into it would be fine. The desk has 2 pioneer cd/tuner car stereos...
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