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“Build a function generator with an Arduino Nano and a AD9833 Programmable Waveform Generator module. The purpose of the project was to test the Analog Devices AD9833 Programmable Waveform Generator chip. On eBay, Ali-Express and other similar sites you can …
“The problem with WS2812B’s on a slow CPU When even the co-author of the FastLED library, Mark Kriegsmann, says it’s can’t be done, you know it’s not going to be easy. “The CPU would need to …
“A hand-held twist-to-set countdown timer for your kitchen. Recently I built an Attiny85 Twist-to-Set Kitchen Timer by bobson.h. After finishing the build, I found that the optical rotary encoder had a number of problems which I won’t go …
“32 bit RISC-V homemade In this article I will describe how I designed and made a functional 32 bit RISC-V CPU at home. Specifications: “Max” clock speed: 500 kHz Program memory: 512 kB RAM size: 512 kB VGA …
“Serial (ascii) monitor with 9 lines of 28 char. Baudrate from 2400 up to 256000 baud. Digital 3.3V or 5V input. Powered by a single Lithium-Ion battery. (3.7V nominal) Supplies: ILI9341 display (here a parallel version is used …
“This is a project that I have been meaning to finish for over a year now. it is a heart shaped, BEAM based pummer circuit I made to charge up during the day and flash like a heart beating at …
“Vectron Handheld is a retro handheld gaming console based on the 6502 CPU. It has five input buttons (up, down, left, right, fire) and a 1.8” 128x160 18-bit color TFT LCD display. I have developed an implementation of Pong …
“When you need pulses of any sort, long, short and with variable frequency you can use one or two 555 timers. That works, is easy to set up and is cheap. But it also limited to a certain range in …
“Ever since the 80’s I’ve wanted to build a Z80 computer. I even bought the chips, but never used them. The reasons for this are varied. I never liked erasing and reprogramming EPROMs. My EPROM eraser died. I …
“After 20+ years of programming, I wanted to get some understanding of the electronics that make my career possible. I had built the basic individual logic gates with transistors on a breadboard, but to build anything meaningful I needed loads …