Tuesday, April 17, 2012
Expand the description and view the text of the steps for this how-to video. Check out Howcast for other do-it-yourself videos from cognitivefilms and more videos in the Science & Technology Projects category. You can contribute too! Create your own DIY guide at www.howcast.com or produce your own Howcast spots with the Howcast Filmmakers Program at www.howcast.com Got a mystery to solve? Somebody's been making off with your stuff, and you don't have a clue who it is, do you? Here's your chance to catch them in the act. To complete this How-To you will need: A laser pointer Some Duct tape A few small mirrors An LM741 microchip A 220-ohm resistor A photocell An inexpensive digital camera An extra small screwdriver A wire coat hanger Some thin, insulated wire A printed circuit board A 9 volt battery A 9 volt battery clip Soldering equipment A pair of wire cutters A soap caddy with drainage holes A voltage relay Step 1: Build the circuit Build the circuit. Center the microchip on the circuit board. Pop in the voltage regulator. Connect the battery clip leads to the regulator. Run 2 more leads out from the regulator. Pop in the resistor and the photo cell. Link the chip to the photo cell. Pop in the relay. Link the chip to it as well. Link the other side of the relay to "power." Step 2: Disassemble camera Disassemble the digital camera so you can access the board connected to the camera's trigger button. Tip: You may have to remove the camera's board to get a good solder ...
http://www.youtube.com/watch?v=zQK1kTh57Fk&hl=en
