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 old version of analogue switch was found in a 1969 documentation. Components of the time are...
This 80's circuit uses an audio amplifier to obtain a symmetrical source from a single source. The...
This circuit was obtained in an English publication of 1975. It is a regulator circuit for...