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The following list is of common suppliers, other than eBay... Electronics UK Arduino boards, shields, etc... Proto-PicOffers 10% student discount SKPang #DigitalMeans Cool Components HobbyTronics Kitronik Oomlout Pimoroni Spiratronics Brigh...

Electronics, componants Bigger Shops - large and often complex catalogues Supplier Material Website Note RS electronics, componants, tools http://uk.rs-online.com/ Fast delivery, huge selection. Free delivery. Collection also possible from Bow Rapid o...

Here is some resources about powering Arduino or other electronic projects: General How to power an Arduino How to power a project What adapter? Portable / Battery powered For portable projects some info on battery usage. http://www.instructables.com/...

The MPR121 is a tiny microchip formerly manufactured by NXP, now under Resurgent Semiconductor, it is a tiny surface mount device that provides 12 capacitive touch electrodes through an I2C interface. What is capacitive touch? Capacitive touch the the technolo...

'Piezo' normally refers to an electrical component which can be used to make sound, however more broadly a piezo is a component that is susceptible to the two-way piezoelectric effect where pressing or squeezing the piezo element can create a small voltage, an...

Buttons and switches are a way of opening and closing a circuit, i.e. making and breaking a connection as one of the most rudimentary forms of sensor you can use with an Arduino. There are dozens of different types of switches and buttons, but at their most ba...

The HC-SR04 is a ultrasonic distance sensor, it uses ultrasound to send out a ping and measure how long the sound takes to come back, exactly like bats use to fly in the dark. The sensor works between 2-400cm however if the ping sound is reflected away from th...

A potentiometer (often abbreviated to pot) is an electronic component with three connections, the main purpose of the pot is to create a variable voltage as an input to a circuit, for example controlling how loud your speakers should be. Inside a potentiomete...

An LDR or Light Dependent Resistor is a component which restricts how much power can flow through a circuit based on how much or little light hits the sensitive part on the top. Wiring To use a Light Dependent Resistor, we have to use it in combination with a...

A rotary encoder is a device used to measure the rotation of something, similar to a rotary potentiometer but not limited to how many rotations can be made, a common example of a rotary encoder is the volume dial on a car radio, which can be turned infinitely ...

The MP3 trigger is a board made by Sparkfun electronics that provides a way to play MP3 files from a Micro SD card via either one of 18 TRIG inputs on the board, or serial communication with the board. The MP3 Trigger has a headphone output which can be connec...