This sequential relay actuation system circuit for traffic lights was found in Electronics Now from the 1990s. Relays are sensitive types of low current coil.
This balance indicator for stereo amplifiers was found in an 80's Elektor. The components used are...
We found this circuit in an American documentation from the 60's. The transistors are made of...
This CMOS driver for triac was found in a 90s documentation. The circuit has direct action,...