Simple low power relay driver schematic

Other Projects

This electronic circuit is a very simple relay driver which can drive a 6 V relay from a 3.3 V . This circuit use a use a charge pump (IC MAX1681 configured as a voltage inverter) to produce the additional -3V needed to activate (pull in) the relay. Turning on Q1 with an external control signal

This high speed switching frequency allows the use of small (1μF) values for the input, output capacitors (C1, C3, and C2). These capacitors can be ceramic capacitors or tantalum capacitors .

The Q1 FMMT717 is a high-side pnp transistor which turns the relay on and off. FMMT717 can be used another similar type with high hfe (the hfe of FMMT717 is 180 minimum at 2.5 A rating ) .

SImple low power relay driver schematic circuit

Similar electronics projects circuits with diagrams

Title: Infrared audio receiver electronic project Circuit Diagram:	Title: Sinusoidal voltage controlled oscillator circuit diagram electronic project Circuit Diagram:	Title: Automatic turn on off for lights Circuit Diagram:
Title: Digital clock alarm based on the Lm8560	Title: Optical warning using LM317 voltage regulator Circuit Diagram:	Title: Power supply connection delay circuit Circuit Diagram:
Title: Water level indicator alarm circuit	Title: Hot wire thermocutter for polystyrene Circuit Diagram:	Title: Road Ice Alarm electronic schematic circuit
Title: Electronic touch switch	Title: ICL7106 ICL7106 digital voltmeter	Title: Safety polarity circuit connection diagram Circuit Diagram:

Circuit Diagrams

Circuite electronice

Simple low power relay driver schematic

Similar electronics projects circuits with diagrams