Solar Dice: a Sensor Node in the Internet of Things (IoT) Reference Design


Design files


The Solar Dice are a battery-less, wirelessly-transmitting device for the Internet of Things.  An onboard accelerometer detects the orientation of the Dice and wirelessly transmits this to a host, such as a USB dongle or smartphone.  The reference design demonstrates an ultra-low power sensor node, which is enabled by ultra-low power optimized code for the CC430 and ultra-low power management through the TPS62740.  The entire system draws a mere 2.36µA when in standby mode.  The Solar Dice are just an example of an unlimited number of different sensor types (temperature, humidity, pressure, etc.) that are enabled by the TPS62740 and CC430.

  • Battery-less operation from 6 solar panels
  • Orientation wirelessly transmitted to host
  • 2.36 µA current draw (standby mode)
  • Ultra-low power optimized power supply
  • Ultra-low power optimized code
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU369.PDF (782 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDR681.PDF (50 K)

Detailed schematic diagram for design layout and components

TIDR682.PDF (55 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC453.ZIP (926 K)

Design file that contains information on physical board layer of design PCB


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

TPS627402.2V-5.5V input, ultra-low-power 300mA step-down buck DCDC converter with 360nA Iq

Data sheet: PDF | HTML
Sub-1 GHz wireless MCUs

CC430F514716-Bit ultra-low-power CC430 Sub 1 GHz wireless MCU with 10-bit ADC, 32kB Flash and 4kB RAM

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
Test report PMP9754 Test Results May 28, 2014

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