This is amazing, someone actually made Lord Vetinari's clock!
If you've ever wrestled with fixed-point math, scaling, and rounding, this blog post is for you!
I go deeper into binary arithmetic, division tricks, rounding, and what it really takes to build fixed-point systems that work.
As always, I appreciate all of your feedback and corrections.
An ESP32 Pomdoro Timer - The Pomdoro technique of time management has moved on a little from the tomato-sha... - https://hackaday.com/2025/03/29/an-esp32-pomdoro-timer/ #microcontrollers #pomdorotimer #productivity #lifehacks #esp32
Pi Pico Turns Atari 2600 into a Lo-fi Photo Frame - The cartridge based game consoles of decades ago had a relatively simple modus ope... - https://hackaday.com/2025/03/27/pi-pico-turns-atari-2600-into-a-lo-fi-photo-frame/ #microcontrollers #retrocomputing #photoframe #pipico #atari
Metal Detector Built With Smartphone Interface - If you think of a metal detector, you’re probably thinking of a fairly simple devi... - https://hackaday.com/2025/03/25/metal-detector-built-with-smartphone-interface/ #microcontrollers #microcontroller #metaldetector #smartphone #toolhacks #esp32
Three SPI Busses Are One Too Many on This Cheap Yellow Display - The Cheap Yellow Display may not be the fastest of ESP32 boards with its older mod... - https://hackaday.com/2025/03/20/three-spi-busses-are-one-too-many-on-this-cheap-yellow-display/ #cheapyellowdisplay #microcontrollers #esp32 #spi
World’s Smallest Blinky, Now Even Smaller - Here at Hackaday, it’s a pretty safe bet that putting “World’s smallest” in the ti... - https://hackaday.com/2025/03/19/worlds-smallest-blinky-now-even-smaller/ #microcontrollers #microcontroller #microsoldering #attiny20 #tantalum #blinky #led
Speeding Up Your Projects With Direct Memory Access - Here’s the thing about coding. When you’re working on embedded projects, it’s quit... - https://hackaday.com/2025/03/18/speeding-up-your-projects-with-direct-memory-access/ #directmemoryaccess #microcontrollers #embedded #code #dma
Checking In On the ISA Wars and Its Impact on CPU Architectures - An Instruction Set Architecture (ISA) defines the software interface through which... - https://hackaday.com/2025/03/18/checking-in-on-the-isa-wars-and-its-impact-on-cpu-architectures/ #instructionsetarchitecture #microcontrollers #currentevents #hardware #interest #cpuisa #risc-v #x86_64 #mips #arm
Ask Hackaday: What Would You Do With the World’s Smallest Microcontroller? - It’s generally pretty easy to spot a microcontroller on a PCB. There are clues apl... - https://hackaday.com/2025/03/17/ask-hackaday-what-would-you-do-with-the-worlds-smallest-microcontroller/ #microcontrollers #texasinstruments #hackadaycolumns #microcontroller #askhackaday #cortex #arm #bga #mcu
A 6502, In The Shell - Shell scripting is an often forgotten programming environment, relegated to simple... - https://hackaday.com/2025/03/17/a-6502-in-the-shell/ #microcontrollers #softwarehacks #shellscript #linuxhacks #shell
Pi Hand is a Digital Display of a Different Sort - Hackers enjoy a good theme, and so it comes as no surprise that every time March 1... - https://hackaday.com/2025/03/14/pi-hand-is-a-digital-display-of-a-different-sort/ #microcontrollers #robotshacks #robotichand #piday #pi
ClockworkPi Unveils New PicoCalc Handheld - Do you like scientific calculators? Don’t bother answering that question, you’re r... - https://hackaday.com/2025/03/14/clockworkpi-unveils-new-picocalc-handheld/ #scientificcalculator #microcontrollers #raspberrypipico #handheldshacks #raspberrypi #clockworkpi
Today I successfully got #Rust code working for a #RaspberryPi #PicoW board! Not bad. All credit goes to the toolchains and projects... my efforts here are purely exploratory / discovery. My current status is I got some Pico / Pico W sample code working and then merged some samples together to form a foundation I'll build more code on top of. The merged code achieves:
The real TL;DR is: The embassy project seems to be the best starting point for Rust on a Pico W. (Not a Pico 2, this is an older RP2040 board.)
The long version is: https://yvan.seth.id.au/rusty-pico-w.html
Writing an OLED Display Driver in MicroZig - Although most people would use C, C++ or MicroPython for programming microcontroll... - https://hackaday.com/2025/03/08/writing-an-oled-display-driver-in-microzig/ #softwaredevelopment #microcontrollers #microzig #ziglang #rp2040 #zig
Low-Resolution Fluid Simulation On An ESP32 - Fluid simulations are a key tool in fields from aerospace to motorsports and even ... - https://hackaday.com/2025/02/28/low-resolution-fluid-simulation-on-an-esp32/ #microcontrollers #fluidmechanics #simulation #liquid #esp32 #gas
esp-hal, a Stable-API ESP32 HAL Gift For Your Rust Code - Looking to write Rust on the ESP32? You’re in luck, a new challenger has entered t... - https://hackaday.com/2025/02/27/esp-hal-a-stable-api-esp32-hal-gift-for-your-rust-code/ #microcontrollers #softwarehacks #esp-idf #esp32 #rust
A Tiny Computer With a 3D Printed QWERTY Keyboard - The ESP32 family are the microcontrollers which just keep on giving, as new versio... - https://hackaday.com/2025/02/11/a-tiny-computer-with-a-3d-printed-qwerty-keyboard/ #microcontrollers #palmtopcomputer #handheldshacks #qwerty #esp32
#Computers are wonderful... they still surprise me once in a while.
One of my #tasmota devices just stopped answering commands via #mqtt but was happily reporting status back via MQTT.
After a lot of debugging I found that the MQTT topic changed from /cmnd/... to /cmjd/...
j in ASCII is 0x6E or 0b010 1110
n in ASCII is 0x6A or 0b0110 1010
So basically one bit flipped from 0 to 1.
Bit flip? Table flip!
(╯° °）╯︵ ┻━┻
That is my first self-observed obvious bitflip. Hooray!
So I will now configure the MQTT Sender to use cmjd for this device, obviously...
