This 50% active cycle TTL clock generates signals from 4 to 20 Hz. Its power must be supplied with 5 V and other frequencies can be generated with capacitor replacement.
Found in an EDN from the 80's, this circuit makes use of an operational one of the time. The...
Other operational amplifiers from the same family such as MC34002, MC35001, MC34004 and MC35004 can...
We find this circuit in an old American documentation from the 80's. The integrated is from the...