Programmable Timer (CB25200E)

This timer has a divider programmed by BCD switches. The circuit is from a Radio Electronics magazine from February 1989.

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Short-wave receiver (CB8391E)
Found in Popular Electronics, this sophisticated short-wave receiver requires a lot of skill from...
Positive peak detector (CB8293E)
This circuit, which can be found elsewhere on this site, detects positive pulses of a signal. The...
Microphone Booster (CB15041E)
This microphone preamplifier with output intensity adjustment is suitable for modulating...