This circuit uses a 555 (according to the diagram) to generate 50 ms tone bursts at a frequency of 1.5 kHz. The circuit is from an 80's Electronic Design.
Found in an Electronics Now from the 90s, this circuit uses components that are still common. The...
May 2017 - Mouser Electronics already has inventory with ROHM BD570xx integrated circuits for...
In this 1970s receiver, the coil has a primary with 100 turns and a secondary with 20 turns, both...