Quad timer controller with transistor power

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01:39:34

This circuit allows for adjustable waveform output from 4 NPN transistors. It can be used to control blinking LEDs (shown) or as a multivoice driver for a tone generator.  Static resistors used here for space but adjusting resistance of resistor nearest the capacitor will change the frequency of that timers output.  Saved at 4 different specs for ease of analysis. And pretty blinking. 

published 4 years ago

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