PTT or Push to Talk is the control that switches the speak-hear function on a transceiver. This circuit was found in the magazine of radio amateurs 73, in an edition of the 90s.
Suggested by National Semiconductor, this circuit can be applied to almost any operational...
Three LM158, LM258, LM358, or LM2904 operational amplifiers are used in this instrumentation amplifier....
Found in an Electronic Design this circuit controls a headlamp by triggering a time determined by the...