1
\$\begingroup\$

I'm trying to make my own home wireless security system. I will be using probably 3 AA batteries to power these devices. My problem is that I need to know if the batteries will be enough to power the devices for at least 6 months. Below are the details of all the devices I will be using:

  1. Mini Nano V3.0 ATmega328P Microcontroller Board w/USB Cable For Arduino
  2. Makerfire Arduino NRF24L01+ 2.4GHz Wireless RF Transceiver Module
  3. uxcell MC 38 Mount Wired Door Window Sensor Magnetic Reed Switch Recessed

Below are some project requirements that might be useful:

  1. For the Nano, I want to put it to sleep using delay(2000) in the loop() function. The Nano will be the one checking the window sensor.
  2. I will be using a project enclosure of about 4X4 inches.

If this will not be possible maybe someone knows of other devices that use less power that will be more suitable for this project? I would prefer something easy to use like Arduino Nano with USB so I can easily program it.

\$\endgroup\$
2
  • \$\begingroup\$ use the reed switch to turn on everything else. \$\endgroup\$
    – dandavis
    Jan 12 '18 at 7:17
  • \$\begingroup\$ Are you sure the delay() function puts the chip to sleep? I wouldn't think so but am not familiar with the Nano. \$\endgroup\$
    – Transistor
    Jul 17 at 21:25
0
\$\begingroup\$

The components you've selected are impropriate (assuming you selected items from Amazon): https://www.amazon.com/ATmega328P-Microcontroller-Board-Cable-Arduino/dp/B00NLAMS9C
and...
https://www.amazon.com/Makerfire-Arduino-NRF24L01-Wireless-Transceiver/dp/B00O9O868G?th=1

The Nano has extra components (LEDs, regulator and Serial/USB chip) on it that are not required. These will require power even when you put the MCU to sleep.

The NRF24L01 is ok, but won't run on 3 x 1.5 V batteries. This unit has no onboard regulator (which is correct for your application) but would only be suitable for 2 x 1.5 V cells

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.