4060 XTAL Oscillator (CB22401E)

We found this oscillator in an old documentation. The crystal frequency can be different to get other output frequencies.

Phototransistor Current (2) (CB14640E)
This circuit was suggested by the Texas Instruments optoelectronics manual. The same configuration can be...
Automation with lock using relays (CB23776E)
This configuration for latching automation using relays was found in Radio Electronics magazine from...
Panic Circuit (CB23903E)
Once fired, it cannot be turned off except by a specific movement that only the builder knows....