Electronics projects with legs.https://bsky.app/profile/technoblogy.comhttps://bsky.app/profile/technoblogy.com/post/3muwnzpuels2eThis is a PCB version of my AVR16EB28-based digital signal generator. It generates a crystal-accurate square wave of from 2Hz to 33.5MHz in precise steps of 2Hz. You can enter an exact frequency, or adjust the frequency continuously using a rotary encoder: www.technoblogy.com/show?5QE207 Sep 2026 13:57 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3muwnzpuels2ehttps://bsky.app/profile/technoblogy.com/post/3mr5xi22cds2gThis is a NeoPixel driver based on a Microchip AVR16DD20 that fits on a small USB-C dongle. It lets you control NeoPixel LEDs using an infrared remote control: www.technoblogy.com/show?5O8R21 Jul 2026 13:54 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3mr5xi22cds2ghttps://bsky.app/profile/technoblogy.com/post/3mpo73bbdls2zThis digital signal generator, based on an AVR16EB28, generates a crystal accurate square wave of from 2Hz to 33.5MHz in precise steps of 2Hz. You can enter an exact frequency, or adjust the frequency continuously using a rotary encoder: www.technoblogy.com/show?5Q7F02 Jul 2026 14:02 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3mpo73bbdls2zhttps://bsky.app/profile/technoblogy.com/post/3mncqqquoy22kThis circuit lets you control a set of one or more high-power NeoPixel RGB LEDs with an infrared remote control. It's based on an AVR64DD14 and a TSOP38238 IR receiver: www.technoblogy.com/show?5H4W02 Jun 2026 13:56 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3mncqqquoy22khttps://bsky.app/profile/technoblogy.com/post/3mmrcju4abk2fHere's a simple HSV to RGB function that can be expressed in a single line of C, as demonstrated by this plot of hue against saturation: technoblogy.com/show?3Z4926 May 2026 15:26 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3mmrcju4abk2fhttps://bsky.app/profile/technoblogy.com/post/3mlsxqrmmis2sHere is an improved version of my TinyCard project, a simple text game maker to allow children to create short adventure games, interactive stories, surveys, or quizzes. It's based on a 160x128 colour TFT display and a Microchip ATtiny3224: www.technoblogy.com/show?54EI14 May 2026 13:53 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3mlsxqrmmis2shttps://bsky.app/profile/technoblogy.com/post/3mkv553pxvk2yMy Universal TFT Display Backpack is a microcontroller board based on a Microchip ATtiny814 that can accommodate a range of different Adafruit and AliExpress colour TFT displays: www.technoblogy.com/show?5O3E02 May 2026 17:10 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3mkv553pxvk2yhttps://bsky.app/profile/technoblogy.com/post/3mfowo25tvs26I built a Feather-format board based on the new ESP32-P4, a dual-core RISC-V processor running at up to 400MHz, with 768KB of on-chip SRAM, 32Mbytes of on-chip PSRAM, and up to 32Mbytes of external flash: www.technoblogy.com/show?5AII25 Feb 2026 14:52 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3mfowo25tvs26https://bsky.app/profile/technoblogy.com/post/3mcfdkwbd522fLight 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?5DCO14 Jan 2026 15:01 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3mcfdkwbd522fhttps://bsky.app/profile/technoblogy.com/post/3m5vyozscdc2zThis 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?572918 Nov 2025 14:56 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3m5vyozscdc2zhttps://bsky.app/profile/technoblogy.com/post/3m4ssc3l63s2hThe 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?4O8604 Nov 2025 14:58 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3m4ssc3l63s2hhttps://bsky.app/profile/technoblogy.com/post/3m46mrhzptc2wThis 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?5DEV27 Oct 2025 14:26 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3m46mrhzptc2whttps://bsky.app/profile/technoblogy.com/post/3lxcnrr4f6k2eThis 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?5CC026 Aug 2025 13:49 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3lxcnrr4f6k2ehttps://bsky.app/profile/technoblogy.com/post/3lwtla5nurs24This 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?5BQG20 Aug 2025 13:53 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3lwtla5nurs24https://bsky.app/profile/technoblogy.com/post/3lw7gzoa4ak2bMy 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?5BGM12 Aug 2025 13:45 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3lw7gzoa4ak2bhttps://bsky.app/profile/technoblogy.com/post/3lv4bh4vxm223The 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?2AON29 Jul 2025 14:02 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3lv4bh4vxm223https://bsky.app/profile/technoblogy.com/post/3ltjvbbcenk2nMy 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?3V6B09 Jul 2025 13:10 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3ltjvbbcenk2nhttps://bsky.app/profile/technoblogy.com/post/3lpmb5in3ls2oThis 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?53Z620 May 2025 14:08 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3lpmb5in3ls2ohttps://bsky.app/profile/technoblogy.com/post/3lmuad3nalc2vFor 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?55KG15 Apr 2025 13:59 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3lmuad3nalc2vhttps://bsky.app/profile/technoblogy.com/post/3ll7j6uyyfs2fMy 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?51KR25 Mar 2025 14:46 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3ll7j6uyyfs2fhttps://bsky.app/profile/technoblogy.com/post/3ljkqbpvy2224My 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?547T04 Mar 2025 15:02 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3ljkqbpvy2224https://bsky.app/profile/technoblogy.com/post/3ljkqai7xg224My 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?547T04 Mar 2025 15:01 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3ljkqai7xg224https://bsky.app/profile/technoblogy.com/post/3ldj5ztsbv22nThis 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?4WX817 Dec 2024 15:32 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3ldj5ztsbv22nhttps://bsky.app/profile/technoblogy.com/post/3lcv2mymczs2tAutomatically expand a 6x8 pixel character set to plot smooth, hinted, double-sized characters: www.technoblogy.com/show?53BK09 Dec 2024 15:37 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3lcv2mymczs2thttps://bsky.app/profile/technoblogy.com/post/3lb33aoamic23The 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?52G416 Nov 2024 14:14 +0000at://did:plc:rvqhei2e53monyprgi3normq/app.bsky.feed.post/3lb33aoamic23