This circuit for photography uses was found in the Electronics Experimenter Handbook Special projects magazine from 1983. The bargraph circuit powers 8 LEDs.
This circuit covers 400 kHz to 40 MHz in three bands according to the selected coil. The double...
Two sensors are used in this simple remote-control circuit, one to switch on and one to switch off the...
This circuit is from the Motorola Linear Databook published in 1990. The circuit for 1 kHz can be...