Fizzing noise update
I tracked the fizzing noise down to a GP cigarette lighter plug which is probably not designed for operation at…
50w led driver, vga heatsink fan and a fizzing noise
The last of my Sure Electronics LED drivers is tested with a 50W LED. A very cheap VGA Cooler heatsink…
Led matrix displays and non-optimal byte orientation
A look at a retro LED matrix display project and problems with some eBay LED matrix modules
Building a battery cell internal resistance tester #1
Some initial ideas for the design of a battery (or cell) internal resistance tester for NiMH AAs or Lithium 18650s.…
Ebay haul: lithium battery paraphernalia
In order to further my understanding of lithium battery technology, I've been on an eBay buying spree. It's all cheap…
12v meteor shower led strips
Fitted with 22 LEDs, a 14-pin microcontroller and a 5v regulator, these LED strips are described as having a meteor…
Fun with ice sculptures, a cpu heatsink and a peltier element
What started as a test on an 8A digital buck converter, quickly changed direction and became messing about with a…
Project preview: wearable oled data display wristwatch device
This is a wearable wristwatch data display combining an OLED display, 3v 8MHz Arduino Pro Mini, 240mAh LiPo battery and…
Charging a lithium 18650 cell using the tp4056
Using a very cheap single cell lithium battery charger module based on the TP4056. For less than £1 you can…
Lithium battery fun – testing 18650 cell undervolt protection circuit
For the very first time I step into the exciting world of lithium batteries - and I get my fingers…