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Old 8th December 2006, 03:02 AM   #11
Staticjeep is offline Staticjeep  United States
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Lol that cd player stuff was the most complex thing i have done so far lol....

if its easy, sure ill try to tackle it.. haha
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Old 8th December 2006, 03:22 AM   #12
v-bro is offline v-bro  Netherlands
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Here's a datasheet of another LM....regulator, max. voltage differential is about 30V! http://www.national.com/ds/LM/LM1086.pdf

And at $0.78, the total price for the converter can stay below $10.00!

It's the LM1086 and the external components are only two capacitors, two resistors, just look at the 'application circuit' in the datasheet..(one adjustable potmeter to adjust the voltage between 1.2 to 15V, but I would recommend a normal resistor in the right value. Otherwise you might put it on too high voltage!

Just use several values to measure the voltage with a (cheap..) multimeter....

The rest is adding a small slab of metal to the regulator with some heatsink paste (carefull mostly very poisonous stuff!) and add a small box (or use a metal box to ground and bolt the regulator to the case...this might help against interference (hum) from your motor...)

When it still hums let me know, you can add ferrite beads and perhaps a toroid somehwere on the in-out wires to prevent this...
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Old 8th December 2006, 03:29 AM   #13
v-bro is offline v-bro  Netherlands
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OOps, sorry, the bolted part can't be connected to ground with this one!
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Old 8th December 2006, 04:06 AM   #14
v-bro is offline v-bro  Netherlands
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Here's another option...
http://www.powerstream.com/dc6.htm
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Old 8th December 2006, 06:44 PM   #15
Staticjeep is offline Staticjeep  United States
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how would that second option work? i dont have a DC or AC plug in my cd player, it only takes batteries??
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Old 8th December 2006, 08:13 PM   #16
v-bro is offline v-bro  Netherlands
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Maybe you can make a 'dummy' battery from a piece of tube...

Or solder a wire internally that you can slip through the casing....
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