The Tinkerkit LCD

Basically an Arduino Leonardo attached to a 16x2 LCD display for less than $10 on Amazon.

Like it says, I've been getting these for around $7 to $8 on Amazon. It's the same chip as the Leonardo with 2 TWI interface connections, a serial connection, a 6 pin ISP, 3 analog and 3 digital pins available. The 6 pins available for use are A0, A1, A2, D5, D6 and D11. Be careful because D11 is actually labelled D12 on many of them.

These have been discontinued and the library was kind of hard to find but I have it in my codebender account so you should be able to copy it easily. There are several examples in the library but most of what you need to use this little guy is right here. Just hookup a micro usb to program and power it and you're good to go.


You can also use this as just a display over serial or TWI. All you have to do is load one of the firmware sketches.

For serial connection:

For TWI connection:
The pinouts for these were hard to find too so hopefully this will help.