made-by-monkeys2

Good ideas with bad execution, or good execution of what should be bad ideas - an analysis of inferior, off-beat or malfunctioning products, and how other people's failures can help us design better stuff.

Circuit Redesign Cools Smokin’ Stereo

 Engineer Andy Morris was having problems with his Chinese-made stereo sets — namely overheating. While the mechanical engineer’s solution would likely be the addition of massive heat sinks or gobs of thermal grease, Morris is an EE — so he created a new circuit to cool things down:

The problem was that a voltage regulator had to drop the 18 volt main power supply voltage to 8 volts at 500ma to power the CD player, wasting 5 watts of power and causing a lot of heat inside the compact unit. This circuit acts as an interference-free pre-regulator to greatly reduce the power loss.

Click here to view Morris’ interference-free pre-regulator circuit.

Tags: China, Stereo, Thermal management

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