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Tiny Lisp Computer Version 2 Gets ATmega1284P Microcontroller Upgrade, Retains 128×64 SPI OLED Display

Notable upgrade to the Tiny Lisp Computer over at Technoblogy – when your DIP40 IC is nearly half as large as the breadboard you’re prototyping on you’re in fun territory for sure! 🙂

My aim in designing the first Tiny Lisp Computer was to create the smallest practical self-contained computer, with its own display and keyboard, that you could use to program in Lisp.

This second version extends the original Tiny Lisp Computer with four improvements: it uses the ATmega1284 to give it more program space; it includes parenthesis matching to make it easier to enter programs; it allows you to connect it to a computer via the USB port, to enter programs from the Arduino IDE’s serial monitor; and it includes a built-in program editor, to allow you to make changes to programs without having to enter them again:

The Tiny Lisp Computer 2 uses the larger ATmega1284 processor, which is available in a breadboard-friendly 40-pin PDIP package and provides 16Kbytes RAM, the largest RAM size of any ATmega chip. It also provides 4Kbytes of EEPROM and 128Kbytes of flash memory. It has two 8-bit timer/counters and a 16-bit timer/counter, allowing you to have 8 analogue PWM outputs, and it includes 8 analogue inputs.

Here’s the schematic and also be sure to read the original blog here for more details!

Read more.


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