This circuit is from a 1972 Motorola publication. The used transistor can still be found, but it can be used equivalent. The circuit is powered by the amplifier with which it must operate.
In the figure we have the transmitter and the receiver for an optical audio link via infrared. The...
Mouser Electronics offers a vibration sensor which is considered the smallest in its class. This...
This power supply for those who want to feed and recover 5 ¼ floppy disks was found in the...