This 1988 circuit makes a back-and-forth of LEDs whose speed is controlled by P1. All components used are common and the circuit can be powered by voltages from 6 to 9 V.
This circuit can be powered by a solar cell. The circuit is from a 1991 documentation having a...
This low power amplifier was found in a Japanese publication from the 1960s, using transistors from that...
This is the traditional configuration of an inverter amplifier with operational. The operational...