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(A Better Etching Solution.)by The Real Elliot in ScienceArduino Countdown Timerby randofo in ArduinoBH1750 Digital Light Sensorby Mohannad Rawashdeh in ArduinoHomemade Arduino Friendly Pulse Sensorby Ladvien in ArduinoHow to Create an Arduino Compatible Bluetooth 4.0 Moduleby Ladvien in ArduinoPrinting Circuits With Conductive Paintby amandaghassaei in ElectronicsArduino Fingerprint Lockby jack1986 in ArduinoUse a DIY Proximity Sensor to Automate Your Haunted Houseby DIY Hacks and How Tos in GadgetsAssembling the Eyewriter 2.1 Hardware Platform (rev B)by jasonwebb in Assistive TechThe MicroSlice V1 | a Tiny Arduino Laser Cutterby Greg_The_Maker in Laser CuttingAutomatic Camera Shutter Switchby DIY Hacks and How Tos in CamerasBetter LED As Light Sensorby kenyer in ArduinoMotion Triggered Cameraby ThisIsSteve in ArduinoElectronic Music Box Powered by Arduino (sort Of)by h2osteam in ArduinoBLU-BOARD, Control Your Home With Blue Tooth!by kyle brinkerhoff in ArduinoAthena: the Global Car Tracking System(3D Images)by Jayvis Vineet Gonsalves in ArduinoRaspberry Pi Multi-Room Audio (Mobile/Tablet/PC Controlled)by Piney in Raspberry PiMultitouch Music Controllerby amandaghassaei in ArduinoIntroducing Climaduino - the Arduino-Based Thermostat You Control From Your Phone!by bbustin in ArduinoArduino Laser Engraverby getburnt in ArduinoMake Your Own Cellphone From Scratch.by mellis in MobileSnap-fit Plexiglas Case for Your Projectby andrea biffi in GadgetsReliable and Low Cost IR Proximity Sensorby Jestin_Cubetech in MicrocontrollersArduino Beginner and Basic Electronics Kit Primerby caitlinsdad in ArduinoSuper Simple Arduino Powered Roomba Schedulerby ShaperG in ArduinoSimple Skillet Surface-mount Solderingby nolandoktor in SolderingSelf-balancing Skateboard/segw*y Project Arduino Shieldby XenonJohn in ArduinoHow to Do Arduino-Controlled Intelligent Time-Lapse Photographyby hlesliebole in ArduinoMake Your First Serious Amplifierby ynze in AudioArduino Webserver Control Lights, Relays, Servos, Etc...by RuiSantos in ArduinoComprehensive Guide to Electronic Breadboards: a Meta Instructableby russ_hensel in ElectronicsCNC Out of a Scanner (cheap)by marwinrobot in CNCBluetooth Controlled Home Electronic Appliancesby achakravarthi in WirelessSIMPLEST IR REMOTE TESTING CIRCUITby ubdussamad in ElectronicsTactile Keyboard / Game Controller With Arduino and Processingby donmatito in ArduinoDas Blinken Bonken! 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- TFT LCD Screen Guideby Qtechknow in ArduinoHave an instructable you think should be included in this collection?SubmitSuccess!