The aim of this pcb is to offer an easy way to build a reliable and compact battery powered multi-sensor based on MySensors, an ATMega328P (Arduino) and a RFM69 or NRF24 radio module.

Features

The main features of the pcb are:

  • Small dimensions: 57 x 57 mm
  • Multiple power options: 2 x AAA batteries (Rechargeable or Alkaline), 1 x CR2032 battery or standard cellphone charger at 5V through the micro USB port
  • Reverse polarity protection (Mosfet Q1) to prevent damages in case of wrong batteries insertion.
  • Boost converter (ME2188C33) to increase the battery voltage to 3.3V when necessary
  • LEDs for radio traffic, low batteries and motion detection signaling. All configurable in the firmware.
  • Multiple radio module supported: NRF24L01 (SMD and THT) and RFM69.
  • Socket for the Si7021 Temperature and Humidity.
  • Socket for the AS312 Pir motion sensor with mounting holes for a standard Fresnel lens like the one used in the HC-SR501 motion sensor.
  • Socket and circuit for a photoresistor to measure the light level
  • Additional PIN to power the board (J6)
  • FTDI and ICSP headers to program the MCU
  • Support for ATSHA204 chip (security and signing)
  • Mounting hole for a M2.5 screw

Downloads

You can download the Gerber files and have ten of this pcb for about 5€, with an online pcb manufacturer like JLCPCB or PCB way.

The entire Kicad project is available here.

Know more…

Visit this page of the d-diot wiki to know more about the pcb and its BOM. 

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