This circuit for a 16-channel infrared transmitter was found in the August 1984 issue of Radio Electronics magazine. The circuit is powered by a 9 V battery.
This circuit for cars of the time was found in a Popular Electronics magazine from the 90s. The...
IDT ZSSC3230 Capacitive Sensor Signal Conditioner Available from Mouser Electronics stock, this IDT...
According to the article in Radio Electronics from April 1986, it would be possible to detect...