The figure shows how to couple two TTL circuits using an optical coupler to obtain isolation. The circuit is shown in the August 1992 issue of Radio Electronics magazine.
This circuit was obtained from an 1974 Everyday Electronics magazine. The circuit is still current as...
Found in a 90s Popular Electronics, this circuit uses components from that time, for a...
The output of this circuit can be coupled to a radio control transmitter to perform a...