A simple decade resistor box

June 19th, 2015

There are situations when prototype/device under test must be checked with (or against) various resistor values. Do it once, do it twice – and soon you wanna have a good ol’ resistor decade box. Read the rest of this entry »

Electronics, Equipment | Posted by Grunf

LED matrix board, part I

July 22nd, 2012

LEDs are cool. A few thousand of them, more so. After playing with 7-seg displays and 5×7 arrays next in line is… 32×24 bicolor LED matrix prototype Read the rest of this entry »

Atmel, Electronics, LED | Posted by Grunf

Dot matrix LED clock

May 29th, 2012

This project has been on my to-do list for a long time:  dot matrix LED clock. Read the rest of this entry »

Electronics, Microcontrollers, PIC | Posted by Grunf

Waveform generator with MAX038

November 1st, 2011

There are several pieces of workbench any intermediate hobbyst can build. Waveform generator is one of them. Read the rest of this entry »

Analog, Electronics, Microcontrollers, PIC | Posted by Grunf

Numeric display with MAX7219

August 20th, 2011

As summer approaches to an end there’s more time to fiddle with electronics. Of dozen projects on my to-do wish list, several ones would nicely benefit by having a built-in numeric display. This turned out to be simple fire & forget project, mostly thanks to good selection of integrated circuit. Read the rest of this entry »

Electronics, LED | Posted by Grunf

A new toy

April 11th, 2011

Over time projects and experiments became more demanding. My poor workbench needed some… shuffling and improvements. Oscilloscope was first on my list. Read the rest of this entry »

Electronics | Posted by Grunf

Pong game: Let’s go retro

February 6th, 2011

There are video games, legendary video games and Mother of All Video Games ™. Latter honorable title belongs to game named Pong. The year was 1972. Read the rest of this entry »

Electronics, Games, Retro | Posted by Grunf