Hackaday.io is having a 2024 Business Card Contest between May and July 2024, I decided to enter the contest with my own design. This describes my design process from planning to the completion for a business card that can be used as real time clock with 3-year battery life and can also be used as an ATtiny3227 development board. Continue reading "ATtiny3227 Business Card + Clock + Development Board"
For many makers, a project idea sometime may take a very long time to materialised. This project for creating a STM32G070-based PalpTop handheld took me almost a year, starting from the initial idea, to making the final PCB, and still not 100% completed yet. Continue reading "Build a PalmTop handheld with STM32G070"
The megaTinyCore work great when using with Arduino IDE, but not so with PlatformIO. This is my quest on making the megaTinyCore work for PlatformIO. Continue reading "Make megaTinyCore work for PlatformIO"
I had a classic Ikea clock that damaged by the leaking battery, during the new year cleaning, my family decided to throw it away, I took it back from trash bin and thinking of a weekend tinkering project to turn it into a digital clock. Continue reading "ESP8266 NTP clock with NTP update and Charlieplexing"
This article talks about how I hack a UYue 946 preheater and convert it into a solder reflow hot-plate. Continue reading "Converting UYue Preheater into a Solder Reflow Hot-plate"
Recently I came across a piece of code which is nearly 50 lines long, plus several global variables, a state machine, all it does is to debounce two buttons. Button debounce does not to be this complicate, in this article I will show you probably the simplest button debounce solution. Continue reading "The simplest button debounce solution"
ATtiny3217 is a modern AVR microcontroller chip from Microchip that could potentially replace ATmega328p that is widely used in official Arduino boards, and here is how I build an Arduino compatible development board based on ATtiny3217. Continue reading "Arduino-Compatible Development Board with ATtiny3217"
This is the second part of the two-parts review on Seeed Studio's ph and EC Sensor Kits. In this part, I will take a closer look at EC Sensor Kit and how to measure EC with an Arduino. Continue reading "A review on Seeed Studio pH and EC Sensor Kits – Part 2"
For the past several months, I've been searching for a cost-effective pH and EC sensor kit and I evaluate Seeed Studio's new pH sensor kit and EC sensor kit this week. Continue reading "A review on Seeed Studio pH and EC Sensor Kits – Part 1"
I recently did a range test over a pair of ESP-01 running ESP-Now, by no means its a comprehensive test, but it gives a better understanding of ESP-01 wireless performance and the ESP-Now protocol. Continue reading "ESP-01 Range Test with ESP-Now Protocol"