Download Solenoid Door Lock Fritzing ((top)) ⇒

Without the correct Fritzing part, your diagram would look unprofessional. With the downloaded part, it looks like a commercial product schematic.

Connected to the Ground (GND) of the 12V supply AND the Arduino Ground (Common Ground). 4. Downloading Example Projects download solenoid door lock fritzing

If you need a complete reference for your paper, these projects provide full schematics and code: Without the correct Fritzing part, your diagram would

: An Arduino cannot power a 12V solenoid directly. External Power : Use a dedicated 12V adapter for the lock. What are you using to switch the lock

What are you using to switch the lock? (Relay module, TIP120 transistor, or MOSFET)

To control the 12V lock using a 5V or 3.3V logic signal from your microcontroller, you need a digital switch.

Electronic door locks are a staple of modern home automation, security systems, and IoT projects. If you are designing an automated access system using an Arduino, Raspberry Pi, or ESP32, you will likely use a 12V solenoid door lock.