This circuit is for traditional old-style telephone lines found in an American 1980s documentation. Components are common and the optical coupler can be replaced with an equivalent.
The IC used in this project is not common these days, but if you have one you can build a high...
August 2017 - Rectron's Schottky Barrier Diodes can now be obtained from Mouser Electronics. The...
This small fluorescent lamp inverter (up to 20 W) can be powered by 12 V battery and even less. The...