Upgrading keychain with XIAO RA4M1 microcontroller
ezContents 25 April 2025
Today we are transforming this mini slot machine keychain into a digital version with an LCD screen.
How to TM1638 with Arduino Uno
ezContents 12 May 2024
A short tutorial on how to get the TM1638 module up and running by using the Arduino IDE and a library.
Decibels (dB) explained
ezContents 21 April 2024
A decibel (dB) is 1/10th of a bel (B), so 10 decibel = 1 bel. A decibel value by itself does not mean anything. It expresses a ratio, typically of power or intensity, on a logarithmic scale.
In electronics, voltage and current amplification are calculated as 20 * log10 and power as 10 * log10. Logarithms are the inverse of exponentiation. For instance, the logarithm to the base 10 of a number is the power to which 10 must be raised to produce that number.
Raspberry Pi Pico W Micropython Quickstart
ezContents 23 July 2022
To start with MicroPython development on the Raspberry Pi Pico W follow the steps below.
Troubleshooting C64 PLA chip replacement
ezContents 15 February 2022
In this blog post I am going to dive a bit deeper into the ezPLA chip, investigate the reason why it does not work in all C64 machines and then try to fix it.
Recreate C64 PLA chip in VHDL
ezContents 14 February 2022
ezPLA - C64 PLA replacement PCB
ezContents 2 September 2021
A while back I created a prototype board for the PLA replacement chip for C64. It was time to make a PCB out of it. In this blog post I will describe the steps that I did to design the PCB using KiCad and manufacture it using PCBWay prototype service.
Teensy 4.1 PSRAM upgrade
ezContents 21 July 2021
Teensy 4.1 can be upgraded with up to 16 Megabytes of PSRAM. Here I describe the process.
1602 LCD module with I2C adapter
ezContents 16 July 2021
This 1602 display module includes an IIC adapter based on PCF8574 chip. This should work nicely on microcontrollers with a limited number of GPIO pins.
Boost Arduino Nano USB 5V to 12V
ezContents 21 June 2021
Using this DC Boost converter (XL6009E1) you can easily convert 5V from the Arduino Nano USB to 12V. This setup should come in handy to power the SID chip.