Most of us toss away our car and boat batteries when they no longer start our vehicle in the winter. Most of these batteries are now advertised as maintenance free lead acid, even though the electrolyte often still dries out. Youtube user Redicety12 shows us how you can bring them back to life by cracking the tops off the battery, dumping out all of the old electrolyte out, rinsing
 Dimitri, Frank, Kevin and Robin from Eectronique have sent in some details of a project that they have been working on. They had an old early 90’s LED matrix sign and wanted to make it work with a Raspberry Pi. The circuit layout is what you would expect from that era. Read More: Old Display Reverse Engineered to work with a Raspberry Pi Google Translated version. “I was
 If you would like to be a super hero for a day, this Titan Arm can make it happen! They have milled the exoskeleton system out of 6061-T6 aluminum. It hasn’t been all smooth sailing, check out this video of the mill crashing when some wrong coordinates were entered by accident. The technology and testing behind the arm is extensive. They have attempted to design it in such a
 We have machines that wash and dry our clothes. I am still surprised that there aren’t more wash and dry combo units available since it would save so much space and eliminate one machine from the house. Folding is still one of those tasks that needs to be done by hand. This might be a thing of the past though! The FoldiMate is a Robotic Laundry Folding Machine that
Rich Olson shows us how he was able to laser etch the trace pattern onto some copper clad PCB using his laser cutter so that he could later chemical etch the unwanted copper away. I have tried something similar and was not successful since I was not able to line up the front and back of the PCB well enough for pads and vias to work. Rich uses a
You can purchase some macro lenses for your phone camera but with a bit of work and a spare LED lens you can make your own. Only thing to make sure is that the LED lens is high quality so that there aren’t any bubbles or other imperfections in it which would cause image distortion. ASCAS shows us how it is done in his LED Lens converted to Macro
