Crystal oscillator (CB9504E)

This circuit was found in a 90s Popular Electronics. It can generate signals from 3 to 10 MHz.

Mini solar organ (CB20506E)
This circuit was found in an old documentation and can be powered by a solar panel. The touch...
Contactless car ignition (CB6393E)
This circuit was obtained from 1967 documentation. It uses a sensor to determine the trigger...
Logic Probe (CB5910E)
This sophisticated logic probe for 5 to 12 V circuits (CMOS and TTL) was found in a 1980s...