Review: 4-cell/6-cell 18650 usb mobile power banks #1
Review of two different USB mobile power banks - white 4-cell with 3-digit 7-segment LED display and black 6-cell with…
Arduino mppt solar charge controller #19 – season two plans
Plans for this season's work on the MuPPeT solar test rig. A look at Ralph's implementation of this project in…
Update: diy single 18650 cell mobile power bank
Charge termination test and a bright pink USB torch head
Arduino power saving tutorial: clock pre-scale and sleep
Experiments to reduce current consumption of the Arduino-compatible Pro Mini.
Review: diy single 18650 cell usb mobile power bank
A good value single cell 18650 lithium mobile power bank which you have to part assemble yourself.
12 volt solar power system, ups slas and anderson connectors
My hotch potch collection of solar panels and car batteries. I'm thinking of replacing the car batteries with some SLAs…
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.…