This 100 kHz oscillator was found in a 1966 Motorola publication. The transistors are of types suitable for the generated frequency and L1 / C1 depend on that frequency.
This is one of the many anti-deboucer circuits the reader can find on this site. The base is TTL...
The idea of wearables is not new and does not necessarily need to be implemented with...
General Electric suggests this circuit in a 1980s documentation. The operational of the time is...