This circuit was obtained from Motorola documentation. It generates light pulses at a rate of 120 per minute. Equivalent transistors can be used. The circuit can also excite high brightness LEDs.
This circuit was obtained from an English magazine from 1976. The transformer has a current of 1.5...
We found this circuit in a 1974 documentation. The NPN transistor can be the BD135 and the PNP the...
In this 1964 Electronic Design circuit, the frequency division of the signal is done according to the...