Instructables: exploring - technology - photodiode - featured http://www.instructables.com Sat, 20 Dec 2014 11:45:42 PST BLOX v1.01 Interactive LED Programmable Canvas http://www.instructables.com/id/Interactive-LED-Programmable-Canvas/
Interactive LED Programmable Canvas - More DIY How To Projects]]> http://cdn.instructables.com/FHA/YSE6/I2IWB8OZ/FHAYSE6I2IWB8OZ.SQUARE2.jpg http://cdn.instructables.com/FHA/YSE6/I2IWB8OZ/FHAYSE6I2IWB8OZ.SQUARE.jpg http://cdn.instructables.com/FHA/YSE6/I2IWB8OZ/FHAYSE6I2IWB8OZ.SMALL.jpg tomhv9 The Aim of this project was to go one step further with the custom canvas'. It cost a bit more but the potential is much greater for this design Theory White LED Resistor CalcsVce = 0.3V @150mALED Voltage Drop = 3.2V @ 20mA Vcc = 9V 9-0.3-3.2 = 5.5V - 5.5/0.02 = 275R ~ 300R **********************...
By: tomhv9

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Sat, 15 Nov 2014 10:20:22 PST
Pocket Photodiode Geiger Counter http://www.instructables.com/id/Pocket-Photodiode-Geiger-Counter/
Pocket Photodiode Geiger Counter - More DIY How To Projects]]> http://cdn.instructables.com/FZ1/Z2XF/HXRU3DL0/FZ1Z2XFHXRU3DL0.SQUARE2.jpg http://cdn.instructables.com/FZ1/Z2XF/HXRU3DL0/FZ1Z2XFHXRU3DL0.SQUARE.jpg http://cdn.instructables.com/FZ1/Z2XF/HXRU3DL0/FZ1Z2XFHXRU3DL0.SMALL.jpg JamecoElectronics Build a DIY geiger counter that uses a PIN photodiode as a substitute for an expensive Geiger-Mueller tube. It detects alpha and beta radiation particles. The circuit is soldered onto a small protoboard and everything is placed in an aluminum enclosure. Copper tubing and a piece of aluminum foil is ...
By: JamecoElectronics

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Fri, 18 Jul 2014 14:55:15 PDT
Model Police Car http://www.instructables.com/id/Model-Police-Car/
Model Police Car - More DIY How To Projects]]> http://cdn.instructables.com/F5B/TLTM/H1LWPXWH/F5BTLTMH1LWPXWH.SQUARE2.jpg http://cdn.instructables.com/F5B/TLTM/H1LWPXWH/F5BTLTMH1LWPXWH.SQUARE.jpg http://cdn.instructables.com/F5B/TLTM/H1LWPXWH/F5BTLTMH1LWPXWH.SMALL.jpg dulcie.head We wanted to build a model police car with working lights and sirens. Then we decided to add a motor and instead of using a switch to turn everything and off we used a photodiode. For our car the photodiode signal is a simple on off switch. If you want a more complicated device that will respond dif...
By: dulcie.head

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Tue, 1 May 2012 16:56:30 PDT
Tamiya 72004 worm gearbox speed sensor http://www.instructables.com/id/Tamiya-72004-worm-gearbox-speed-sensor/
Tamiya 72004 worm gearbox speed sensor - More DIY How To Projects]]> http://cdn.instructables.com/FGU/L5XF/KRNEQHO9AY4/FGUL5XFKRNEQHO9AY4.SQUARE2.jpg http://cdn.instructables.com/FGU/L5XF/KRNEQHO9AY4/FGUL5XFKRNEQHO9AY4.SQUARE.jpg http://cdn.instructables.com/FGU/L5XF/KRNEQHO9AY4/FGUL5XFKRNEQHO9AY4.SMALL.jpg ame I wanted to accurately control the speed of the motor in a Tamiya 72004 worm gearbox for a robot I am building. To do this you must have some way to measure the current speed. This project shows the evolution of the speed sensor. As you can see in the picture, the motor drives a worm gear directl...
By: ame

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Tue, 8 Aug 2006 19:46:23 PDT