Instructables: exploring - technology - photodiode - featured Thu, 23 Mar 2017 00:29:33 PDT BLOX v1.01 Raspberry Pi Laser Security System
Raspberry Pi Laser Security System - More DIY How To Projects]]> EliBuilds Thanks for checking out my instructable. By the end of this instructable your will construct the raspberry pi laser tripwire system with email alert functionality that is shown in the video. To complete this instructable your will need to be familiar with general circuitry and soldering, know how to...
By: EliBuilds

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Wed, 21 Sep 2016 17:45:37 PDT
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