EEssential

The battery can be purchased for less than $2 a piece.   But it is a little skeptical that the capacity is actually 3000mAh.  The weight is ...

"18650 Battery Shield V3" charges a 18650 lithium ion battery and outputs 5V and 3.3V.  It claims 4A on 5V and 1A on 3.3V.  It can...

The most annoying problem with ANENG AN8008 multimeter is the poor accuracy of high current measurements.  Significant error is seen for th...

I wrote about  $4 multimeter  (also see  here ), which is fine for crude measurements.  For $20, we can have a meter with the following enha...

The TS100 soldering iron is an open source hardware by Miniware, which releases the schematics and software.  It has a decent construction; ...

I was generally pleased with  Cen Tech multimeter  from Habor Freight.  Similar looking multimeters (Item 63604) sold at Habor Freight now d...

Small computer modules like the Tinker Board now easily outperform old laptops while the cost ratio is 1:20. Why is that Tinker Board runs...