Thread: Hardware troubles
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Old 07-01-2004, 08:01 PM   #20 (permalink)
Ar.Pi
 
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Originally posted by Greywolf@Jun 25 2004, 08:15 AM
Well... you see, the dynamo of my bike produces exactly 12V - enough for the hard-drive and with a couple of resistors and a 7805 IC voltage regulator I got the 5V out of the 12... and since the RAM needs 3,3V and I had only a 3V voltage regulator chip, I had to pull up the ground of the chip by using the Base-Collector junction of a NPN Germanium Transistor... I was lucky to have one, cause the normal Silicium-based semiconductors have a treshold of 0,6 - 0,7 V and 3,6V would be too high for the RAM.



























Naaah, just used another power supply
MF!

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