Using the 4001 integrated circuit, this latching relay can employ any general-purpose transistor. The power supply is according to the relay with voltage up to 12 V.
Other operational amplifiers can be used on this unit gain amplifier. The circuit is from the 1993...
This simple circuit causes an LED to light up when the battery voltage drops below the voltage set in the...
This experimental AM radio circuit was found in a 1979 English magazine. It can be fitted with a...