LED Flasher Unijunction (CB22144E)

The frequency of this circuit depends on the capacitor. The unijunction transistor can be the 2N2646.

Temperature controlled oscillator (CB7528E)
The thermistor used in this circuit must have a resistance at room temperature between 10 and...
Fluorescent Indicator (CB18952E)
This circuit can be used as a signal when powered by a car battery, as it also works with 12 V, or...
Tunnel Diode Remote Control Transmitter (CB13341E)
This micro-transmitter for the 27 MHz band was found in a 1976 technical documentation. The...