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 provides a signal of higher frequency the greater the intensity of the light incident on...
This circuit was obtained from a 1978 Practical Wireless. It generates a low frequency, low...
This circuit can be used as a lockable shield. A pulse activates the relay that remains on even...