Download ^hot^ Solenoid Door Lock Fritzing -

This smart lock system uses an Arduino UNO, MFRC522 RFID reader, and a 12V solenoid lock to create a secure access control system.

: An Arduino cannot power a 12V solenoid directly. External Power : Use a dedicated 12V adapter for the lock.

You must use an external 12V power supply to power the lock directly.

Happy making!

Drop a DC Barrel Jack adapter into the workspace and label it 12V.

Community expert "Peter" from the Fritzing forum explains: "The referenced part is electrically identical (i.e., two wires) and is as close as there is at present. It serves the same function and exists. If that doesn't suit then someone would need to make a new part".

When the solenoid turns off, the collapsing magnetic field generates a reverse voltage spike (up to 200V). Without a flyback diode, this kills the MOSFET or Arduino. Your Fritzing diagram must include this diode. download solenoid door lock fritzing

// Solenoid Control Configuration const int solenoidPin = 3; // Digital pin connected to MOSFET Gate void setup() pinMode(solenoidPin, OUTPUT); // Set control pin as output void loop() digitalWrite(solenoidPin, HIGH); // Unlock: Engage solenoid delay(3000); // Keep unlocked for 3 seconds digitalWrite(solenoidPin, LOW); // Lock: Disengage solenoid delay(8000); // Wait 8 seconds before next cycle Use code with caution. Troubleshooting Common Fritzing & Hardware Issues

Realistically, you may never find a solenoid lock part that matches your specific component perfectly. This is where electrical equivalence becomes your most important concept.

Before designing in software, it is crucial to understand the hardware. This smart lock system uses an Arduino UNO,

To visualize the lock in your schematic and PCB view, you need to download a custom Fritzing part file ( .fzpz ).

:

[12V Power Supply Positive] --------> [Solenoid Lock Pin 1] & [Diode Cathode / Striped End] [Solenoid Lock Pin 2] --------> [MOSFET Drain] & [Diode Anode / Plain End] [MOSFET Source] --------> [12V Power Supply Negative/GND] & [Arduino GND] [Arduino Digital Pin (e.g. D3)] ------> [1K Resistor] ------> [MOSFET Gate] Use code with caution. Critical Circuit Design Rules to Remember in Fritzing You must use an external 12V power supply