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Solenoid door lock circuit.
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Solenoid lock needs 9v 12v to operate and raspberry pi gpio pins can supply only 3 3v so a 12v external power source is used to trigger the lock with the help of a relay.
Get it as soon as thu sep 3.
The circuit diagram for raspberry pi solenoid door lock is very simple as you only need to connect the solenoid door lock to raspberry pi.
The solenoid door lock will remain open until the hall effect sensor output is high.
Connect your diode between the two solenoid cables this will prevent current discharging back through the circuit when the solenoid coil discharges.