Electronic & Electronics Components Depot United States. Build this simple "electronic electroscope," a FET electrometer. Warning: don't connect the battery until you are SURE you've hooked everything up exactly right. It's possible to burn out the FET or the LED if they are connected incorrectly. Don't let the transistor's wires bump together even briefly, or it will flash the LED and burn it out. NOTE: Don't ever connect any LED directly to a 9-volt battery, it will burn out the LED. Without the transistor to limit the current, a bare LED needs a 1000-ohm resistor wired in series if connected to the 9-volt battery.
Warning: Avoid touching the Gate wire of the FET. QUICK INSTRUCTIONS: Use three clipleads. The 1-meg resistor helps protect the FET from being harmed by any accidental sparks to its Gate lead. To test the circuit, electrify a pen or a comb on your hair, then wave it close to the little "antenna" wire. IF IT DOESN'T WORK, the humidity might be too high. 1.
The circuit is an electronic version of an Electroscope. Other modern devices also respond to nearby electrified objects. Trossen Robotics - World's leading robot shop for robot kits and robot parts! Basics \ Wiring ALPHA 1.0. Cover \ Exhibition \ Reference \ Learning \ Hardware \ Download \ About »Feed »Forum »Wiki »Code Tutorials: \ Examples: Basics, Library, Topics \ Books Getting Started Blink Digital read Serial Analog read Serial Switch Photoresistor Fade Digital Output LED blink LED blink sequence LED swing 7 Segment led numerical LED display Optocoupler: 4N35 Relay 120-240 VAC Light bulb: TRIAC MOSFET: IRLD024 LED Port Tone keyboard Tone melody Tone multiple Tone pitch follower Digital Input Switch (button) Multiple switches Hall effect sensor distance (proximity) sensor: Parallax ping Transmissive optical sensor Analog Output RGB LED Motor speed Stretch sensor & LEDs Light sensor & LED Structure Statements and comments Setup and Loop Loop Functions Data Variables Integers and floats True/False Characters and Strings Character classification Datatype conversion Variable scope Arrays Vectors Split a string and convert it to numbers Bidimensional arrays Passing an array to a function © Info, Processing © Info.
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