Precision Crystal Calibrator CIR22334S CB21784E (CB21784E)

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

Light Relay (CB18451E)
The sensor for this light relay found in a 1967 Japanese magazine is a common photocell. The...
Multiplexed BCD Driver (CB20908E)
This circuit was found in an Electronics Now from the 80's. The circuit is designed for 3-digit...
Night LED Indicator (CB20324E)
We found this circuit in an old documentation. What it does is flash two LEDs when night falls or when...