ADK USB Host Shield soldering This tiny PZEM-004T circuit is

This tiny PZEM-004T circuit is great for measuring AC (RMS) voltage

1 4PIN FF Dupont wire

1N4005 diode

measuring muscle activity has traditionally been used in medical research

This Peacefair PZEM-004T Multi-function AC Power Monitor is very popular in electrical consumption measurement projects

ADK USB Host Shield soldering This tiny PZEM-004T circuit isUSB Host Shield is an add on board for Arduino development platform and contains all of the digital logic and analog circuitry necessary to implement a full speed USB peripheral host controller with your Arduino. This means you could use your Arduino to interface with and control any USB slave device thumbdrives, digital cameras, bluetooth dongles, keyboards, mice, joysticks, MIDI, etc