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December 16, 2016 AT 11:11 am

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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Monochrome 1.3″ 128×64 OLED graphic display: These displays are small, only about 1.3″ diagonal, but very readable due to the high contrast of an OLED display. This display is made of 128×64 individual white OLED pixels, each one is turned on or off by the controller chip. Because the display makes its own light, no backlight is required. This reduces the power required to run the OLED and is why the display has such high contrast; we really like this miniature display for its crispness! Read more.


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