Category: Microcontrollers

This is a project I built for work as an add on to our battery tester which is able to test up to six batteries at once. The battery tester is controlled by a PLC and does not show voltages in real time so we had no idea how long the battery runtime was remaining. […]

I’ve been working on a new Arduino project; the ultimate alarm clock which shows the time and date on a 16×2 LCD module and features multiple alarms with repeat / auto arm and radio function. I used a Tiny DS1307 RTC and EEPROM module which is a breadboard / veroboard compatible PCB containing a DS1307 […]

Back in October I posted about a basic NIMH battery tester based on an Arduino nano I made some time back which was a successful project and works quite well however it could only test one battery at a time and didn’t apply a constant current load. It was good but not very accurate and […]

Introduction I’ve been playing around with a red 5×7 dot matrix LED display module which I have had in my spares box for a while. I thought about making some sort of scrolling message display as an Arduino project but could not find any more of these modules online as I’d need at least another […]

A close relative of mine has been having lots of wifi connection issues over the last few months but just on a couple of devices. A scan of the wifi neighborhood showed only a couple of signals from adjacent houses which were too weak to cause a problem. I tried changing the channels, 150 or […]

***Updated*** now version 5 which has a vastly improved display layout and better voltage reading accuracy. Download can be found towards the bottom of this page. During my clearout of old junk I came across an LCD display fitted into a small plastic case with a PC parallel cable attached which was originally used for […]