This circuit is from an August 1984 Radio Electronics magazine. It monitors the state of a RAM backup battery. Resistor R1 determines the battery charge.
This amplifier with a few watts of power was found in a Japanese technical documentation from the...
This circuit is from a 1977 National Semiconductor integrated circuits manual. The circuit admits...
This conventional power supply uses discrete components and can provide 12 V or 13.6 V output with...