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Author Topic: Digital amplifier circuit  (Read 1019 times)

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Trimoor

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Digital amplifier circuit
« on: May 21, 2005, 10:31:48 pm »
Can someone help me design a simple circuit to amplify the parallel port output to 12 volts?  Can I do this with a single NPN transistor and an optoisolator?  It only needs to source a dozen or so milliamps at a fairly low baud rate.

I am using it to drive a rather peculiar audio device, of which I shall describe at a later time.

Thanks!
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Trimoor

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Re: Digital amplifier circuit
« Reply #1 on: May 24, 2005, 08:25:48 pm »
*Bump*
Come on, it's a simple single transistor circuit.  Anyone?  I can never figure out transistors...
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