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17 Steps with Pictures The prank box is basically a sealed wooden box with an electric bell inside that is activated by a key switch.
Once it is turned on, a relay inside the box is latched and it cannot be turned off without knowing the secret trick (Spoiler Alert:magnets). Quite understandably, a completely sealed box with a ringing bell inside that doesn't seem to stop can quickly become maddening. It is very gold pandora charms funny to watch people ponder the implications of pandora australia rings the device, reluctantly turn it on, and then stress out when they cannot turn it off. It is even funnier to get panicked emails from your friend in Canada after you mail it to him without any explanation, and he decides to ignore the directions on the box and turn it onStep 1: Go Get Stuff The laser cut template should be etched (when appropriate) and cut. The "DO NOT INSERT AND TURN KEY" shape should be etched and cut from 1/8" acrylicAttach a red wire to the common connections for the reed switch and the key switchAttach another red wire to the normally open (NO) connections on both switches. Connect these two wires to the red wire from the 9V battery clipAttach black wires to the two normally closed (NC) connections on both switches. Connect these two wires to the black wire from the 9V battery clipIn essence what you have just done is create a situation in which ground is always connected in the circuit. pandora jewellers By engaging one of the switches, you are introducing a positive voltage.
This in essence flips the polarity one way or another, and latches the relay open or closed. So, when you turn the pandora gold bracelet sale key, it latches it closed and keeps the bell ringing. Then, when you engage the reed switch, it flips the polarity and latches it open and turns off the bellBefore you are done, you need to wire the bell to the D battery holder and the relay.
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