This circuit of a 1969 Electronic Design uses RTL logic. The setting can be adapted to TTL. The frequency is given by the crystal.
This circuit is from a Linear Technology application manual. The circuit uses the LT1022 and has...
The frequency of TTL square signal is divide by 5 with this circuit. Power supply is 5 V and the...
The microphone of this short-range MW transmitter should be low impedance magnetic (a small...