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.
Suggested by Fairchild in a 1980s publication, this multiplier uses operational amplifiers from that...
This circuit, from a 1981 publication, can be changed to use more modern components such as the...
We find this circuit in an American publication of 1978. The integrated circuit is the CMOS 4013...