can we run Chimuino on battery?

[samthiriot]

Analyze energy consumption and the possibility not to have to plug the chime on an outlet.

[samthiriot]

See source https://openhomeautomation.net/arduino-battery

[samthiriot]

see https://engineersportal.com/blog/2018/3/21/arduino-internet-of-things-part-2-lowering-the-power-consumption-of-the-atmega328p-breadboard-arduino-with-the-hm-10-bluetooth-module

[samthiriot]

see also http://www.home-automation-community.com/arduino-low-power-how-to-run-atmega328p-for-a-year-on-coin-cell-battery/

[samthiriot]

see for the stepper engine: https://forum.arduino.cc/index.php?topic=393500.0

[samthiriot]

for the RTC clock:

• base consumption is around 300uA
• should stop square wave and other useless features at startup
• see http://www.picaxeforum.co.uk/showthread.php?29952-Power-consumption-of-DS3231-AT24C32-board

[samthiriot]

seems like the best efficiency with stepper engines is reached by accelerating gradually instead of defining the top speed immediately

[samthiriot]

there is the possibility to run the stepper engine with a wave signal, which means one coil at a time instead of two - better efficiency when the load is to high enough to require the two coils

[samthiriot]

tension: the stepper requires 5V to move, the regulator is absorbing a bit less than 1V, the battery is loosing tension with time => to run the stepper out of a battery pack, the battery pack should be around 7V (?)

[samthiriot]

the 28byj-48 stepper is rated about 70 Ohm per coil. So at 5V or 6V its consumption is about 70mAh to 85mAh per coil.

[samthiriot]

On the arduino side:

• lower the frequency of the chip
• put the arduino on sleep when not used
  See for low poser:
• http://www.gammon.com.au/power

[samthiriot]

consumption of a nano: https://arduino.stackexchange.com/questions/926/what-is-the-maximum-power-consumption-of-the-arduino-nano-3-0

there are low power versions of arduino, like:
http://www.rocketscream.com/blog/product/mini-ultra-8-mhz-arduino-compatible/

[samthiriot]

wake up the arduino in case of a change in light : https://engineersportal.com/blog/2018/3/24/arduino-internet-of-things-part-3-external-interrupts-using-a-motion-sensor-hc-sr501

[samthiriot]

Wakeup on bluetooth communication:
https://forum.arduino.cc/index.php?topic=107665.0

[samthiriot]

solar powered?

• https://www.gammon.com.au/forum/?id=12821

[samthiriot]

see http://heliosoph.mit-links.info/arduino-powered-by-capacitor-start/

[samthiriot]

https://www.gammon.com.au/forum/?id=12821

[samthiriot]

https://www.gammon.com.au/power