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.
With this name the LED effects circuit presented was found in the Electronics Now magazine of...
We found this simple protection with zener diode in a 1967 Motorola documentation. The zener diode...
This circuit, which can use the 4011 or 4001, was found in documentation from the 90s. The load...