Electric Door Lock

In this instructable you will learn how to create a door lock. First we are going to make a prototype out of cardboard, then make the final build out of wood and metal. You will either glue or nail this. Have fun!

Sheet of metal, sheet of wood, sheet of cardboard, tape, glue or nail, switch, 2 AA batteries, 2 AA battery holder, and DC motor with gearbox

Take your sheet of card board and tap down the switch when you want it to go. Do not put it in the top left corner if you are going to put this on the left side. For right, do the same. Glue the motor down so the end sticking out of the gear box points up. Put that either on the left or right side, depending on where your door is. If you put the motor on the right, then you should put the lock the left side, depending on what side your door is. Attach the battery to the cardboard piece, then connect all the wires the correct way. Cut a square out of the cardboard and then cut a figure 1 centimeter wide, 2 inches long. Glue that to a figure the same width, but a centimeter longer so they form a corner. Cut a little hole the size of the end sticking out of the gearbox. Attach the cardboard figure, and turn it on. If the figure starts to spin, that is good. The figure will get caught on the figure you are about to make. You can open the door because it is cardboard. Once you do your prototype the cardboard will be replaced by wood, and the figure with metal. Once you nail it or glue it it will be done. Go on to the next step to show you how to make the final build.

Cut the same shape of the cardboard in wood. The wood should at least be a centimeter thick. Repeat all the steps from the last step, but instead of using tape, use glue. Once done, nail to door and line up the side the motor is on, with the side of the door. Cut 2 1 inch tall, centimeter thick, and two centimeter wide blocks of wood to the side of a centimeter tall, 2 inches wide, two centimeters long block of wood. Turn on the machine so the arm is lowered to a ninety degree angle. Nail in the block of wood in that place so when you turn the machine on, the arm will get lower and caught in it. Try to open the door. It will not work. I recomend nailing everything to make it stay. Hope this is useful. Have fun!