In this Instructable, I'm going to show you how to make a simple, reliable remote control door lock. This type of lock can be used in many different applications such as a front or interior door in your house, or a cupboard or drawer that you don't want your kids getting into.
Let's get started!
Step 1: What You Will Need
Below is the parts list for this project. It may be possible to accomplish this with less cost using an RC rotary servo or the electronics from an RC car. I've seen a few different ones around. We've taken a different approach and used only high-quality parts that will leave you with a nicer looking build that will last you a long time and not look as DIY.
1. "S" series Linear Servo (we've used an Actuonix L16 with a 30mm stroke)
2. Wireless RF Remote Control (Also available from Actuonix - $40USD)
3. Sliding Bolt Lock - Available from any hardware store.
5. A Length Of Rigid Wire
Step 2: Mount the Lock
I can't provide much detail on this as how you mount the lock will depend on your particular project. Mount it in a way that makes sense for your purpose. Just be sure that you're within range of a wall plug and that the lock slides smoothly the entire way to get maximum lifespan from your linear servo and get maximum lifespan.
Step 3: Wire the RF Controller
Wire the controller according to the diagram below. The "S" series actuator will plug directly into the plug at the end of t he red and black wires on the output side. To connect the device to the 12V power supply, be sure to wire positive and negative correctly.
Both wires are black so double check your work here. The wire with the white dotted line is positive.
Step 4: Connect the Servo to the Lock
This can be done any number of different ways. I chose to use a piece of rigid wire that I had kicking around. This allows for a firm connection between the two, but has enough give that nothing will break if the lock binds up.
Step 5: Test the Movement
Now you're ready to test your remote control door lock. Using one of the 2 wireless controllers that comes with the RF controller, run the lock back and forth and make sure that it doesn't bind up at all.
Now is the time to fine-tune your lock and make adjustments as necessary.
Once you've got it dialed in, enjoy your new wireless remote lock!