The S-meter is a signal strength meter used in communication receivers. This circuit was found in a 303 Circuits from the 90s, European publication.
September 2017 - Can be purchased from Mouser Electronics Triacs with 20 A and 30 A currents...
This power supply uses a Raystor which is a 1964 LDR lamp coupler. The circuit was found in an...
This circuit uses two operational amplifiers that admit equivalents. The configuration is from...