Instructables: exploring - technology - photodiode - featured Mon, 26 Sep 2016 00:17:30 PDT BLOX v1.01 IR (Infrared) Security Alarm System
IR (Infrared) Security Alarm System - More DIY How To Projects]]> mandlabs In this project, you will build transmitter and receiver circuits using an IR LED and a photo-diode. The circuit is based on obstacle detection when a person or thing comes in between the transmitter and receiver. The alarm gets triggered and beeps continuously till the time the circuit is reset. ...
By: mandlabs

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Wed, 3 Aug 2016 15:33:01 PDT
Particle Core / Photon - Proximity Sensor
Particle Core / Photon - Proximity Sensor - More DIY How To Projects]]> ThisIsSteve In this tutorial I'm going to show you how to design a Proximity Sensor (infra red) along with the Particle Core or photon. This instructable is a part of a series of instructables using the particle core you can check that out before trying out this instructable.I'm trying to keep this instructable...
By: ThisIsSteve

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Mon, 10 Aug 2015 07:44:47 PDT
Interactive LED Programmable Canvas
Interactive LED Programmable Canvas - More DIY How To Projects]]> 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
Pocket Photodiode Geiger Counter - More DIY How To Projects]]> 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
Model Police Car - More DIY How To Projects]]> 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
Tamiya 72004 worm gearbox speed sensor - More DIY How To Projects]]> 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