This automotive circuit was found in the September 1992 issue of Radio Electronics magazine. The circuit directly drives a relay that must have a coil resistance greater than 65 ohms.
Standing wave ratio or SWR is an important measure of whether all power from a transmitter is being...
Here we show how to add a reset key to the monostable using two NAND gates (CB127E). When the key...
This short-range circuit can act as a wireless microphone. We got the schematic and the printed...