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Iteaduino Leonardo – Improved From Arduino Leonardo

“The Arduino Leonardo is a microcontroller board based on the ATmega32u4. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.” — From Arduino.cc

Iteaduino Leonardo is a improved version Arduino Leonardo compatible board, it also basic on ATMega32u4 with Arduino Leonardo bootloader, but we make many practical improvements on Iteaduino Leonardo:

1. 3.3V / 5V operation level support

There are many external modules which using the 3.3V power supply and 3.3V I/O level, if want to use the Arduino Leonardo to connect with them, you need to build some level-shifting circuit between them – but now, you just need to put the operation level switch to 3.3V side, the Iteaduino Leonardo will work in 3.3V 16M and the I/O level will change to 3.3V as well, so you can easily to use it with the other 3.3V level modules now.

2. More energy efficient

Arduino Leonardo use the 5V LDO chip for external power supply, so there will be much heat loss if you use the high external power input, and the max current supply is 500mA, it may not enough for some project. Iteaduino Leonardo use the DC-DC circuit for external power supply, it will support 7 – 23V wide range external input, and it can provide 2A current max – We put a 500mA PTC on board to protect the IC and circuit, if you need the 2A power supply, you could use a 0R 1206 resistor to replace or short the PTC.

 3. All pins breakout

All pins breakout as 3PIN electronic brick interface, you can easily to use it with many Electronic Brick modules – By using electronic bricks, you may connect Arduino compatible boards easily with various digital, analog and I2C/Uart interfaces. These the breadboard-less firm connection are prepared to extensive modules like poteniometers, sensors, relays, servos…even buttons, just plug and play.