Sensitive Crowbar (CB5887E)

This circuit is from an 80's documentation, firing when the input voltage exceeds 5 V. The SCR can be the TIC106 need not have a heatsink.

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Digital Cassette Recover (CB13606E)
This circuit makes it possible to recover programs recorded on cassette tape as was common in MSX...
0 to 12 V Adjustable Power Source (CB16283E)
This ultra-simple adjustable power source is of great use on the bench of any electronics...
Light Sensor Preamplifier (CB6434E)
Found in a 1990s American technical brochure, this circuit is intended for alarms that use as...