Driver for Electric Typewriter (CB6561E)

This circuit was found in a Philips documentation from 1966. Its purpose is to drive the solenoid of an electric typewriter of the time.

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Simple LED Indicator (CB4554E)
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Missing Pulse Detector (CB6027E)
The values of R and C are set so that a time constant of the same order of magnitude as the...
150 Hz to 1.5 kHz Wien Bridge Oscillator (CB25907E)
This circuit was found in the December 1995 issue of Electronics Now magazine. The circuit...