Make Your Own Humane Mouse Trap from Simple Materials

Say goodbye to your mice problem with this simple DIY humane mouse trap.

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If you have a serious case of a mouse infestation, but don't have the heart to actually exterminate them, then you might want to take a look at this humane, and easy-to-build mousetrap. Using a few simple materials, and a little effort, you too can whip up a working mousetrap in no time. 

Follow this guide to find out how. 

diy mousetrap complete
Source: Million Gears/YouTube

As you can imagine, you'll need some tools and materials before you get started like any project of this nature. 

Materials and gear needed

Once you have all the materials and tools needed, we can now get on with the build. 

Step 1: Make the trap mechanism

The first step is to make the trigger mechanism for the trap. To do this we first need to take two short lengths of metal (you could using some old iron-rich nails) and solder wires to each of them. 

diy mousetrap metal probes
Source: Million Gears/YouTube

With that complete, take your sun board and cut out two equally sized squares of 3 and 5/16ths (10cm) by 3 and 5/16ths (10cm) for the pressure pad of the mousetrap. Also cut three strips of sun board to the same height by 19/32ths of an inch (1.5cm) wide. 

diy mousetrap sun board pieces
Source: Million Gears/YouTube

With the board pieces ready, add a thin line of hot glue to the centerline of one of the boards and glue one of the metal rods to the board. Next, add a thin line of hot glue off-center and perpendicular to the first sun board square on the other square of sun board. 

diy mousetrap electrodes
Source: Million Gears/YouTube

With that done, add another line of hot glue opposite and parallel to the last electrode and adhere one of the strips of sun board to it. Next, add another line of hot glue and add a second strip of sun board on top of the first. Rinse and repeat for the last strip. 

diy mousetrap stack of boards
Source: Million Gears/YouTube

Next, add a final line of hot glue and then turn the other square of sun board over so that the metal rods are opposite each other. Then glue the board to the stack of sun board pieces on the other square of sun board.

diy mousetrap complete trigger pad
Source: Million Gears/YouTube

This assembly will form the basic trigger mechanism for the trap. When a weight is placed on the top of the pad, the electrodes will touch, which in turn will complete the circuit -- ultimately sealing the victim's fate. 

Step 2: Make the main trap boxing

Next, take your acrylic or perspex sheets. Cut out six pieces to make an elongated cuboidal box. For this particular design, you'll need four sheets of 9 and 27/32ths of an inch (25cm) by 3 and 5/16ths (10 cm), and two "doors" of 3 and 5/16ths (10cm) by 3 and 5/16ths (10cm). 

diy mousetrap box pieces
Source: Million Gears/YouTube

Once cut, peel off any adhesive coverings to expose the clear acrylic underneath. Take one of the longer pieces, and glue the trigger mechanism into the center of the sheet using some hot glue. 

diy mousetrap glue trigger mechanism
Source: Million Gears/YouTube

With that complete, glue one of the other longer sheets of acrylic to the base to make one of the walls of the trap. Make sure the piece is more or less perfectly vertical. 

Next. take your soldering iron, and melt a hole through the acrylic sheet just above the trigger mechanism on the base.  

diy mousetrap melt hole
Source: Million Gears/YouTube

With that complete, fee the wires from the trigger through the hole. Next, glue and stick into place the other long wall of the trap. 

With the trap now well underway, it is time to turn our attention to the trap door of the trap. Cut two lengths of acrylic 3 and 5/16ths (10cm) by 25/32ths of an inch (2cm). 


Glue a single magnet into the center of each strip of acrylic. 

diy mouse trap glue magnets
Source: Million Gears/YouTube

Take one of the magnet and acrylic strips, and glue it between two of the walls of the trap to make a lintel. Rinse and repeat for the other end of the trap. 

diy mouse trap magnet lintel
Source: Million Gears/YouTube

Step 3: Make the lid and main electrical circuit

Next, take the last long strip of acrylic and glue the motor to it. Do the same for the switch, but place it relatively near to the motor. 

 Also, glue the battery to the lid. With that done, solder the positive wire of the battery holder to one of the terminals of the switch.

diy mouse trap wire switch
Source: Million Gears/YouTube

Next, run and solder a wire between the other free terminal of the switch to one of the terminals of the motor. Then run another wire from the other terminal of the motor. 

diy mouse trap wire motor
Source: Million Gears/YouTube

With that complete, glue the lid (and electronics) to the top of the trap. Ensure that the electrical components are on the outside of the trap. Also, ensure that the loose wire from the battery and motor pointing towards the "back" of the trap where the wires from the trigger are exposed through the wall. 

diy mouse trap glue lid
Source: Million Gears/YouTube

With that done, complete the circuit for the electronics by connecting one of the trigger wires to the negative wire of the battery holder, and the other to loose wire rinning from the motor. 

diy mouse trap complete circuit
Source: Million Gears/YouTube

Solder the connections as needed. 

Step 4: Add the doors and complete the trap

Next, take the remaining squares of acrylic you made earlier. Line one of them up into place at one of either end of the trap. Make a hinge using a strip of sellotape to hold the door into place against the main trap. 

diy mouse trap tape door
Source: Million Gears/YouTube

With that complete, close the door, and add a blob of hot glue on the outside of the door where the magnet meets it. Then glue another magnet in place. 

diy mouse trap door lock
Source: Million Gears/YouTube

Rinse and repeat for the other door of the trap. 

With that done, take some thread, and cut a length of it. Glue one end of the thread to the top side of the door nearest the motor. 

diy mouse trap thread
Source: Million Gears/YouTube

Next, take a regular plastic drinking straw and cut a small length of it. Glue the piece of straw into the corner of the lid directly above the thread.

Next, add a small pulley to the axle of the motor. 

diy mouse trap pulley and pipe
Source: Million Gears/YouTube

Now feed the thread through the length of the straw, and glue it to the pulley of the motor. 

diy mouse trap glue thread to pulley
Source: Million Gears/YouTube

With that done, your DIY mouse trap is now finally complete. Before you deploy it in anger, it might be a good idea to actually test the device. 

Open the door with the thread attached, and flick the switch into its on position. Then find a suitable weight -- a couple of 9V batteries tied together will do. 

Chuck them onto the trigger mechanism. 

diy mousetrap test
Source: Million Gears/YouTube

The weight of the batteries should depress the trigger, and cause the motor to initiate. This in turn should close the open door in quick succession.

If everything has gone to plan, the trap should work flawlessly. Now, if you want to actually deploy it in the wild, add some bait to the trap -- like some cheese or a piece of bread, and set the trap by opening the threaded door. 

Ensure the other door is fully closed, of course. When you return to the trap you should find a very full, if not confused, rodent. 

diy mousetrap worked
Source: Million Gears/YouTube

If you enjoyed this simple project, you may want to test your skills to the limit with something a little more complex. How about, for example, your own tabletop "Among Us" game

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