Martin Cowen
The idea for this project was a simple countdown timer to be used by children for various games and activities where the user interface was designed to be as simple as possible; the display was clear from across the room and provided a sense of urgency, with a clear notification when the time was...
aashvik's feed
A post about ZIPPERMAU5, a WIP micromouse robot using a custom pcb, teensy 4.1, brushed dc motors, and time-of-flight sensors.
Willy Tarreau
Baby steps are importantFour years after I wrote about some improvements brought to my Eleksmaker laser engraver, I made quite a lot of progress on multiple fronts.Laser moduleI was regularly annoyed by the too irregular laser beam and finally acquired a NEJE A40640 model that's supposedly 15W...
Andrew
Last Updated on June 13, 2024 Callsign beeper CW kit interface This is an Arduino-based callsign keyer or beeper that connects directly to the CW jack of your radio. Use it for microwave path lineups. It also has a +12v output which can be used as a driver stage for a GALI84...
Willy Tarreau
BackgroundBack in April, the hardware news site cnx-software featured a very nice new small Linux board called Breadbee, that was designed and still being developed by one of the site's readers, Daniel Palmer (aka 'dgp'). The board has many unique particularities that appealed me:it is small, very...
Willy Tarreau
Background After having successfully built a few tiny USB batteries in the past, I was always left with a bit of frustration about the difficulty to build them. My previous model has been working flawlessly for the last 2.5 years now despite the hackish way it was built, that's undeniably a...
Willy Tarreau
After starting to use my laser engraver, I found a few points that really needed to be improved. [Update-2024-07-30: new resolution and accuracy improvements described here: https://wtarreau.blogspot.com/2024/07/improving-laser-engravers-resolution.html ] Seeing under the piece First, when...
Willy Tarreau
Abstract I started making my own PCBs at the age of 10, using a pencil on PCB. 10 years later I bought a kit with an UV table, the ferro-chloric acid tank with bubbles and heating, and presensitized copper, but found it very difficult to use for occasional week-end projects and continued to work...