New Lab. 2020-12-15

Finally the new lab is up and running. Everything has its place and the workspace is well thought thru. Instruments are easy accessed and there is a lot of space to work on!

Four4 usb charger. 2020-06-17

So it was time to make another kickstarter project. At first i needed a reliable charger at home due to that increasing number of gadgets we are charging. When i designed it i was so good that several collegues wanted one and they all liked it. It was then decided to make it as a crowdfunding project.

It uses the 16F18346 controller which is a cheap and feature packed mcu with alot of memory. At first i used a smaller mcu but when starting programming the memory wasn enought. The Oled display uses more than 50% of the memory due to it's drivers. Good to have in mind.

Another issue i had with this newer mcu was that i never succeeded to actually set up the registers correct to use the internal I2C modules. I ended up using software I2C. Slower but works fine in this application.

I put alot of effort into the product to make it bulletproof and i have worked more than 6 months on it. Had alot of issues with the wall power supply and discussed with the vendor.

I tested and verified everything to the extent that there were no isses left!!

One main feature of it was that it had almost zero internal resistance and therefore it had very low voltage drop and power loss at maximum charging power. It had really low temperature at high load!