Precision Crystal Calibrator CIR22334S CB21784E (CB21784E)

We found this circuit in a 1977 radio documentation. The circuit uses TTL frequency dividers from the time.

Nicad charger (CB9543E)
Found in National Semiconductor documentation from the 90s, this circuit makes use of components from...
Capacitance Meter (CB25988E)
This circuit was originally designed to measure capacitance with an ICL7107 but can be used with...
Receiver TDA7000 (CB15974E)
The TDA7000 is a Philips integrated circuit that contains a complete FM receiver with the need for...