Power meters like the Kill-A-Watt are great for keeping track of ... I now have a working setup where the energy meter is completely wireless with an Arduino mini pro 3,3V and a nRF24L01 ...

[oakkar]’s optical power meter uses these SPF transceivers, tied together with a fairly simple circuit consisting of an Arduino, a few tact switches, a Nokia LCD, and an FTDI UART.

Learn how to build a DIY current and voltage meter using Arduino Nano. This project demonstrates step-by-step instructions to measure current, voltage, and wattage with precision. Using simple ...

A simple Arduino project to measure the stability of USB power supplies. This project can easily be reconfigured to be a simple digital voltage meter. Aspencore ... this Arduino DVM can also be used ...

Power Supply (5-12V) and External Battery connector The UDOO has been in development for more than a year, and the team says it is "80 percent ready" to deliver the final product.

The parts arrived for the RPM meter that uses an Arduino and reciprocal counting to get a three-times-a-second update rate with 1rpm ... for Electronics Weekly, covering electronics developments for ...