The figure shows how to couple two CMOS circuits using an optical coupler to achieve isolation. The circuit is from a Radio Electronics from August 1992.
We found this transmitter for the 70 to 90 MHz band (FM in Japan) in a Japanese publication at the...
This low-frequency oscillator was found in a 1963 documentation. Capacitors determine frequency. The...
This simple half-wave control using an SCR, which may be TIC106, has been obtained from a US...