Why are even the modern day cars are not equipped with biometric entry system? Here is an attempt on a Toyota C-HR.

You'll learn how to store the last command used for actuate or desactuate a charge/device.

How to go from theory to a practical working prototype.

Electric vehicles are new enough to wonder, how long will they last? This is not a simple question, because it depends on a lot of things.

Measure the juice left in your AA or AAA batteries anytime using an Arduino Uno and a couple of jumpers.

This library creates an 8-bit IO port for Arduino by combining any 8 Arduino pins. With this library, one can send/get direct 8-bit data.

Step by step on how to program a ATtiny85 microcontroller with Arduino Uno development board.

This library controls and drives motion of all types of bipolar stepper motors with 2 phase (4 terminals).

This is an Arduino camera module, using the surveillance camera's digital image processing chip-OV0706.

FreeRTOS, simple, easy to use, robust, optimised for Arduino IDE. Full access to FreeRTOS capabilities, within classic Arduino environment.

Make your hardware push data to a Google spreadsheet.

Regulated smart constant current charger for 9V NiMH rechargeable batteries.

Arduino's great, but how in the world do you do two (or more) things at once on separate intervals? You need protothreading!

A time switching battery powered solar charged circuit, used to power an Arduino Uno and some peripherals.

We used a TI FDC1004 breakout with an Arduino to measure liquid level in a bottle using the capacitance between two adhesive copper strips.

Program your Arduino with an Android device over Bluetooth HC05.

Clock LCD display adjustable.

Simple Arduino Uno - ESP8266 software serial integration.

Logic Analyzer, for Arduino, other AVR and STM32 with a very nice working processing interface, you could run it also on any Android device.

Using a phone as a makeshift GSM module.

If you can't find a voltmeter at home or anywhere else, then this hack is for you!

Extension to Ben Eater's breadboard computer that allows saving/loading programs and works as a monitor, assembler and disassembler.

An Arduino UNO Flash and RAM update with the ATmega2560 as DIL 28 variant.

An Arduino powered floppy disk controller and reader/writer for making and writing disk images from and to old AmigaDOS floppy disks.