Light Lab allows you to display different patterns on RGB LED NeoPixel (WS2812 or WS2812B) or DotStar (APA102 or SK9822) strips, and experiment with them: www.technoblogy.com/show?5DCO

This USB-C Power Delivery Dongle delivers one of six fixed voltages from a USB-C power adapter that supports Power Delivery: www.technoblogy.com/show?5729

The Bauble is a spherical festive decoration, based on an AVR32DD28, with 16 coloured LEDs that you can program to flash in different patterns: www.technoblogy.com/show?4O86

This simple continuity tester, based on an ATtiny202, a piezo buzzer, and an LED, is ideal for checking circuit wiring, or tracing out the tracks on a PCB: www.technoblogy.com/show?5DEV

This final article in the series shows how to fit my hardware driver for NeoPixel (WS2812) LED displays onto the 14-pin AVR64DD14 by taking advantage of the Event System on AVR processors: www.technoblogy.com/show?5CC0

This article shows how to eliminate most of the interconnections between pins on my hardware driver for NeoPixel (WS2812) LED displays by taking advantage of the Event System on AVR processors: www.technoblogy.com/show?5BQG

My latest project is a driver for NeoPixel (WS2812) LED displays using AVR hardware. It works by combining the SPI peripheral with a Timer/Counter using Configurable Custom Logic (CCL): www.technoblogy.com/show?5BGM

The Walkie-Textie is a simple handheld device, based on an ATtiny814, that allows you to send and receive text messages using a 12-key keypad and OLED display: www.technoblogy.com/show?2AON

My latest project is a Feather-format board based on the Microchip AVR128DA32. It runs at 24MHz, has 16KB of RAM and 128KB of flash, and runs uLisp: www.technoblogy.com/show?3V6B

This is a simple LED tester, based on an ATtiny85 or ATtiny202, that provides a convenient way of testing most types of through-hole or surface-mount LEDs: www.technoblogy.com/show?53Z6

For a more relaxed approach to life the Timescale Clock displays the time as a scrolling scale on two bi-colour dot matrix displays; see www.technoblogy.com/show?55KG

My latest project, TinyCard, is a simple text game maker to allow children to create short adventure games, interactive stories, surveys, or quizzes: www.technoblogy.com/show?51KR

My latest project is a digital clock, based on two 8x8 bi-colour LED dot matrix displays, that changes from red to green if the time is a prime number: www.technoblogy.com/show?547T

My latest project is a digital clock, based on two 8x8 bi-colour LED dot matrix displays, that changes from red to green if the time is a prime number: www.technoblogy.com/show?547T

This is a PCB for my scrolling text display, based on four 8x8 LED dot-matrix displays, that you can edit with a keyboard. It's based on an ATtiny85: www.technoblogy.com/show?4WX8

Automatically expand a 6x8 pixel character set to plot smooth, hinted, double-sized characters: www.technoblogy.com/show?53BK

The Cardputer uLisp Machine is a self-contained handheld Lisp computer based on the low-cost M5Stack Cardputer; for more information see: www.ulisp.com/show?52G4