Foundation: Secret Draftsman Lock

The Secret Drawer Lock up provides nonvisual high tech security measures to a dresser, or storage locker drawer. It uses a elastic device solenoid shut away mechanism that is powered when a Walter Reed (magnet) switch is activated. It is very simple to build and rather effective. It uses a bombardment to power the lock mechanics, but I have besides included a (optional) power left on the bottom of the drawer to be fit to plug away it in and activate it even if the bombardment dies.

Step 1: Materials

To make a Secret Drawer Lock you will need:

(x1) Solenoid engage mechanism
(x1) Reed alarm switch
(x1) 12V rechargeable Direct current battery
(x2) Crimper-on quick disconnects
(x1) Lock strike denture
(x2) 1/4" x 1/4" spacers (or appropriate for your project)
(x2) 1" wood screws
(x4) 3/4" Grant Wood screws
(x1) power jack (optional)
(x1) High-strength attraction hook


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Measure 2: Wire Connectors

Strip the ends of a piece of red and a piece of black stranded telegraph and crimp along two fast disconnects onto the ends of the cable. These will attach the circuit to the electric battery.

Step 3: Extend the Wires

Solder the strange ends of the red and black wire to the ii wires coming from the ignition lock mechanism and isolate from each one with head-shrinker tube-shaped structure. Information technology is non outstandingly important which color telegram gets engaged to which on the lock.

Step 4: Mount the Lock

Fasten the lock to the front inside edge of the drawer facing up.

The lock mechanism needs to atomic number 4 lower than the top of the drawer for this to work.

Stair 5: Bond the Interchange

Come out the reed switch in one of the corners of the wrong of the draftsman just about the front.

In virtually cases it's prizewinning to have it high-backed off conscionable a trifle bit because from the front of the drawer because this will make it a little bit harder to trigger. This means that you will need to have the attraction in scarcely the right spot.

Step 6: Plug in the Battery

Connect the quick disconnection attached to the black wire to the sarcastic establish terminal on the battery.

Connect the quick disconnect attached to the red wire to the red mightiness terminal on the battery.

You can now use a magnet to test to make certainly information technology works. If it doesn't, try road the reed shift closer to the front of the drawer. If it still doesn't work, try getting a larger magnet or checking if the battery is charged.

Ill-use 7: Powerfulness Jack (ex gratia)

You don't need to do this part, simply I recommend information technology. Should the shelling of all time die, the drawer won't exist competent to agaze. This plug provides a 'back entrance' to earmark you to shortly apply power to open the draftsman, get the shelling out, and recharge it.

To wire it up, prototypic unplug the battery. You are in for a shock (both figuratively and literally) if you don't!

Incoming, cut the wires that connect to the battery in half. Solder the black wires for each one to one of the respective outer terminals.

Solder the cardinal Red River pumped-up unitedly to the center terminal.

Step 8: Instal the Power Seaman (optional)

Drill a 1/4" cakehole through the bottom of the draftsman, and install the exponent sparking plug from the inside out.

Fasten it tightly in topographic point with the plug's mounting hardware.

Keep in mind the power jack is installed to provide a backup business leader source using only a 12V chew with a positive tip connection. IT is non recommended to charge the battery through the jack. You should unplug it and connect it to a battery charger when necessary.

Gradation 9: Measure to the March

Figuring out where to mount the strike plate is a teeny bit foxy. You need to solve where to position it so that the latch catches it when the drawer gets pushed in.

Fortunately, this can be resolved with some careful measuring. Measurements lean to differ from draftsman to draftsman, but this is my general physical process.

I simply pushed the drawer clear in and rhythmic the distance from the inside of the drawer to the edge of the aerofoil I am climb the strike plate to. In this case, it is the bottom of the top surface of the close table.

Step 10: Determining Strike Plate Side

Next I necessary to work where to mount the strike plate in relation to the inside edges of the drawer.

To arrange this I centered the strike plate atop the lock and careful the distance from the inside look edge of the drawer to the center of this pairing. While I was at it, I also measured the distance from the side edge to the center of the lock.

Tread 11: Mark for Mounting

Once I knew all of the positioning data, I added conjointly the first measurement with the measurement of the inside front border to the center of the lock for a aloofness we will call "D". I flipped the end table over and drew a line along the underside of the top (the upward facing side) at aloofness "D" synchronic to the front man edge. This line indicates where the center of the lock will cost one time pushed in.

In the end, I measured over from the edge to work out where the run into plate needed to be mounted along this line indeed that it would land in the center of the lock. One time I was sure, I marked the discove plate's climb holes.

Gradation 12: Mount the Chance on Plate

Insert the drawer, and push it intermediate closed.

Mount the strike plate victimisation woods screws and 1/4" (or appropriately sized) spacers to bump it up a little from the opencut of the drawer. The idea is that it should equal leaded to the right height to catch the latch from the lock.

Step 13: Side by side the Drawer

To get on the safe side of meat, get a magnet and test it one last time in front you close it. If you close it before information technology works, you promising won't get it back open (without some furniture surgery).

When you are sure information technology is working, close the draftsman.

Step 14: Hang the Magnet Hook

Hang the magnet snare somewhere nearby and camouflage information technology away dangling something from information technology. No one will suspect this is the key out to the drawer.

Step 15: Keep Things Safe

Keep your things secret. Hold out them safe.

When the time comes to unlock it, go pull the attracter hook from wherever it is hanging and unlock the drawer.

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