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Lisp Badge LE
This is a self-contained low-power computer with its own display and keyboard that you can program in uLisp, a version of the high-level language Lisp for microcontrollers:
David Johnson-Davies
This is a PCB version of my earlier digital signal generator that generates a crystal accurate square-wave signal from 2Hz to approximately 33.5MHz in precise steps of 2Hz. The frequency is continuously adjustable over this range using a rotary encoder, or you can enter an exact frequency using a numeric keypad, with…
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Walkie-Textie Wireless Communicator
The Walkie-Textie is a simple handheld device with a 12-key keypad and OLED display that allows you to send and receive text messages using the LoRa wireless protocol. It's ideal for situations where there's no mobile signal, such as when you're camping or hiking in a remote area, when you don't want the cost of a…
3
Logic Lab
The Logic Lab provides a selection of 12 logic gates that you can interconnect with patch cables to make a variety of different logic circuits, for experimenting with and learning about logic:
4
Tiny Lisp Computer
This article describes a self-contained computer with its own display and keyboard interface, based on an ATmega328, that you can program in Lisp. You can use it to run programs that interface to components such as LEDs and push-buttons via the I/O pins, read the analogue inputs, and operate external devices via the…
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Lisp Badge – Self-contained ATmega1284 Lisp computer
This is a self-contained computer with its own display and keyboard, based on an ATmega1284, that you can program in the high-level language Lisp:
6
Sound Lab – A Simple Analogue Synthesiser
Sound Lab is an analogue synthesiser, consisting of six modules that can be combined in a variety of ways. It uses a single printed circuit board that doubles as the front panel and wiring, with surface-mount components and PCB-mounted controls to make the construction as easy as possible: