Using a BA1404 integrated circuit this small FM stereo transmitter was found in a Radio Electronics magazine from October 1989. The coils are indicated.
This circuit with the ICL8068 was taken from an article in the February 1981 Radio Electronics magazine....
The National Semiconductor operational amplifier, now owned by the Texas Instruments group, is no...
The Motorola MOC501O optocoupler has a complete amplifier inside the sensor, enabling the...