Download Haywired: Pointless (Yet Awesome) Projects for the by Mike Rigsby PDF

By Mike Rigsby

Until you reside in a haunted residence, the eyes in your work most likely don’t stick with you round. although, with a few movement sensors, vehicles, a number of transistors, resistors, diodes, and wires you could convert a Van Gogh print right into a macabre masterpiece with a brain of its personal.

Haywired proves that technological know-how can encourage extraordinary gadgets. Create a Mona Lisa that smiles even wider in the event you procedure it. find out how to construct and list a conversing alarm, or craft your personal speaking greeting card. build a no-battery electrical vehicle toy that makes use of an excellent capacitor, or a flashlight that may be charged in mins, then shine for twenty-four hours.

Written for budding electronics hobbyists, writer Mike Rigsby bargains worthwhile tricks on soldering, cord wrapping, and multimeter use. every one venture is defined in step by step element with images and circuit diagrams. contains websites directory providers and half numbers.

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Now you are ready for a test of your circuit. Put four AA batteries in the holders and turn the switch on. The switch is on when the black slider is pushed in the direction of all the soldered switch connections. The switch is off when the black slider is pushed in the direction of the two unused pins. Allow the sensors to “adapt” for about 30 seconds. Place your hand in front of one of the sensors. Hopefully, both eyeballs will move together in the direction of the sensor. If the eyes move the wrong way, it’s not too hard to fix.

Why does the circuit have Diodes D1 and D2? The relays don’t turn off easily and sometimes create enough voltage to destroy a transistor. The diodes allow this 42 Haywired unwanted voltage to run around in a circle for a few millionths of a second without harming anything. When Sensor 1 is active, it turns on Transistor Q1, which energizes Relay A, which allows power through the normally closed contacts of Relay B, which causes the motors to turn. When Sensor 2 is active, it turns on Transistor Q2, which energizes Relays A and B.

Connection #57 attaches to the end of Resistor R2. Moving Eyeball Picture 37 Connection #58, the other end of the wire, attaches to the output of Sensor Module 2, as in the photo on page 36. This module is placed on the left-hand side of the frame (as viewed from the back). Now you are ready for a test of your circuit. Put four AA batteries in the holders and turn the switch on. The switch is on when the black slider is pushed in the direction of all the soldered switch connections. The switch is off when the black slider is pushed in the direction of the two unused pins.

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