LM555 Voltage Doubler

January 12, 2020 delabs 0

This circuit shows the voltage doubler working with a 555. LM555 has good drive 200mA, both Vcc and Gnd. 555 has the advantage of having […]

Battery Backup Supply

February 16, 2019 delabs 0

This is a 9V power supply which will work even on power failure. It uses a rechargeable battery and regulators. A transformer with 15-0-15 AC […]