Ultra Long Period Timer (CB25049E)

Using the ZN1034E which reaches 19 days interval, this is a simpler circuit which can be programmed according to the table given with the diagram.

Infrared Transceiver (CB16886E)
The simple optical intercom we show is from a 1995 documentation. The LEDs can be infrared or...
Tape Recorder Nonitor (CB24170E)
With this circuit it is possible to monitor a signal that is being recorded on an old tape...
Controlled Oscillator (CB12683E)
An oscillator that can be frequency controlled by a resistive sensor is shown in the figure. The...