EEssential

I finally retired a ten year old router which can no longer support the speed from the cable modem.  It has been running DD-WRT firmware; no...

Hennessy and Patterson's Computer Architecture book was first published in 1990 and the sixth edition came out in 2017.  That is a span ...

The $3 Li+ battery charger is very simple in construction.  It has a single layer PCB.  I could not identify the IC, which linearly regulate...

LoRa is a low-power and long distance wireless technology.  I have a set of Semetch SX1272 boards.  We'll try to use them to communicate...

PSoC from Cypress is a unique microcontroller for the flexibility of its peripherals.  The low-cost PSoC 5LP prototyping kit CY8CKIT-059 is ...

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...