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rayshobby / squarewear

SquareWear is an open-source wearable electronics controller board. This repository contains the hardware design files, software library, and software demo.
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power consumption on power down mode #2

Closed acornejo closed 10 years ago

acornejo commented 10 years ago

What is the power consumption of the squarewear?

Specifically, if you put the atmega in power down mode (turn off all features, including adc, etc), how much power does it draw?

I would like to estimate what kind of battery life I can expect for the squarewear if used for data logging applications. I would put the atmega in power down mode, and wake up every 8 seconds using the watchdog timer, take some measurements and write on eeprom, and go back to sleep.

rayshobby commented 10 years ago

I just measured: in power-down mode, it consumes 150uA current. Some part of it comes from the photoresistor (which is connected between VCC and GND in series with a 10K resistor). If you remove the photoresistor the current should be lower.