RPIZ_CT3V1 - 3 CT and 1 Voltage AC adaptor for Raspberrypi zero.

Rating: Choose the maximum rms current in Ampere the board can support with the associated CT. For any custom setup please opt for "other".

Voltage Sensor Type: Choose the desired support for the voltage port.

Sensors and Raspberrypi are not included.


Rating (A)
Voltage Sensor Type
In Stock



Raspberrypi AC current and voltage hat

Online Documentation

  • 3x AC Current Ports.
  • 1x AC Voltage Ports.
  • Provides Irms, Vrms, RealP, ApparentP, PFactor.
  • View/record data using Linux / Python / Emoncms / Grafana / MQTT and more.
  • Configurable from serial port.
  • Open Source Arduino Firmware.

Package Content

  • 1 RPIZ_CT3V1 Unit.
  • 2 Mounting Stand off with screws.
The listing does not include sensors and Raspberrypi.

Recommended Sensors



(for any other CT sensor please contact us to have adapted resistor mounted and calibration coefficients calculated)

Technical Specifications

Microcontroler Atmel Attiny84
MCU Frequency 8Mhz
Operating Voltage 3.3V
Waveform Sampling 1250sps
Fastest Data Polling 600ms
Vertical Resolution 10 bits (1024 steps)
Communication UART Serial Port
Firmware Arduino (open source)
Dimensions 56x35mm
Programming port 6 pin ISP
Compatible OS Any supporting GPIO serial port access
Compatible Raspberrypi All of Family Raspberrypi Zero
Compatible CT Current output type
AC Current Range Options from 20A to 600A
AC Voltage Range Options from 140V to 280V
Smallest Readable Current Approx 50mA to 150mA

Scope of Use

This development board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by LeChacal.com to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This
evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.

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