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E.box: a multifunction smart device made to monitor, in an advanced way, the power consumptions

E.box is a completely new device designed to respond to the needs of different groups of people. It is a all-in-one instrument that can be compared to a different range of professional solutions: it can be used as an oscilloscope, multimeter, audio capture device, mining farm controller and so on. You can connect to E.box with a USB cable, WiFi or CAN-bus, controlling it from our open source pc software or a web interface.

What is it?

Have you ever wanted to measure the power consumption of an appliance? Are you a hobbyist tinkering with an electronic device and you want to view the current and voltage waveform of a transformer or a power supply? Are you a crypto miner and you want to monitor the power consumption of your farm? Now you can.

E.box is an all-in-one power analyzer, oscilloscope, multimeter, audio capture device. It works like an extension cord: simply connect E.box between the power source and the appliance. E.box has three communication interfaces: a usb port for a fast data transfer and raw samples streaming, a dual can bus connector to chain multiple devices using ethernet cables, a wifi web-server that allows you to monitor the device from a browser even remotely. Safety has been a design criteria for the board.

Features:

  • Works with both DC and AC power sources
  • 5V USB powered
  • Two voltage channels and one current channel
  • Built in relay to enable or disable power output
  • IEC C13-C14 connectors
  • One USB port, two RJ45 connectors, one wifi module
  • CAN bus supports up to 64 chained devices
  • Four status leds: board ready, output on, output overload, wifi status
  • One button for manual relay toggle
  • Maximum voltage: 390Vdc or 275Vac
  • Maximum current: 15A
  • Frequency: 10Hz to 500Hz
  • Measure voltage as low as 1mVdc or 0.1Vac
  • Measure current as low as 1mAdc or 10mAac
  • High voltage isolation: 7mm clearance with air gaps
  • Size: 163mm x 100mm x 50mm

What makes it special?

  • Measures: voltage, current, frequency, active power, apparent power, reactive power, cos phi, active energy, apparent energy, reactive energy
  • Power input and output are isolated from the communication section
  • Tolerates large overloads for short periods
  • Can stream voltage and current samples via USB like an audio capture device
  • Open source software
  • Designed and Assembled in Italy

Why did you make it?

We haven’t been able to find any inexpensive power analyzers: if you want to capture the voltage and current waveforms from a power socket you have to use an oscilloscope and a couple of differential probes which are very expensive.

Video demos are available on YouTube: https://www.youtube.com/channel/UCykofA1I7hzNNAwrOy6vzeg

This project will be available very soon on tindie.com

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