This 1965 Philips circuit uses old company transistors like the BFY51 and BFY50. The circuit is powered by 12 V and the power gain is 8.9 dB.
This circuit causes the load to switch on only after a time given by R1 and C1. The SCR must be...
This circuit causes the LEDs of an array of 100 LEDs to flash sequentially along the lines. The...
The figure shows how to interface a 24 V signal with TTL logic using a 4N26 coupler. The circuit is...