Gas ignition (CB7075E)

This circuit for igniting gas flames was found in a 1967 Electronic Design. The SCR firing device is a gas lamp of the time.

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Sound Operated Switch (CB23996E)
This circuit was found in the February 1970 issue of Radio Electronics magazine. The integrated circuit...
Bicycle Direction Indicator (CB10670E)
This circuit came out in a publication called Electronics Handbook of 1993. The circuit triggers an...
Hybrid Amplifier - 10 or 20W (CB999E)
This amplifier uses hybrid modules Sanken and can provide powers of 10 W or 20, depending on the...