The first Arduino which only has the receiver gets only one radio signal per day.
The second Arduino which also has a transmitter will always transmit a short signal every time the PIR sensor is triggered (I would say 15 to 30 times a day).
And yes, 4x Alcaline @ 2000 mAh+.
What battery life can I expect on both devices?
I checked your hyperlink and it seems that I only get 4.9V with four AA-battiers. Is this still okay for 5V consumers?
But the components won't consume these numbers all the time, right? If the LED is flashing every 30 seconds and the PIR sensor is triggered only 15 to 30 times a day. Is there no way that I can run this setup for some weeks or months with 4x AA-batteries?
That datasheet just specifies 65mA. And I don't think triggered or not makes a real difference. So just measure it
Same advice for the transmitter, just measure it! And if the quiescent current is high, use a PNP to disable the power when not in use.
Of course the led will only draw current when lid. 20mA is the max current per LED. For a RGB that means 60mA max. But if it just has to indicate something 1mA is more then sufficient. Just use a resistor accordingly.
And to make the Arduino more efficient, disable everything you don't need. Remove the power led. And put it to sleep as often as you can
And it sounds like it doesn't need to do much. Maybe reduce the clock to use the internal 8Mhz clock. That way it's able to run fine down to 2,4V
thanks for your replies. English is not my native language, so please excuse me if I have trouble explaining my project.
As I already mentioned, I need two different modules to realize my project. The first module only receives a RF signal once a day and fades in a RGB LED from 0% to 100% brightness over a period of 30 minutes. The second module has a PIR sensor which commands the RF transmitter to transmit a signal every time it gets triggered. In advance both modules should have a Status LED which should flash every 30 seconds to state that the battery is not empty.
I don't know much about electronics and Arduino seemed to be manageable to me. The problem is, I already have two Arduino Nanos at home for this project.
@septillion: This sounds good, but as I already said, I don't know much about electronics. I don't know if I'm able to do all these things.
Is there a way that I can get similar consumption values with my Nano using the JeeLib? What else can I do to get the least power consumption possible?
How do I use the JeeLib with a PIR-Sensor which should always scan? Put in a 1000 ms Sleep so it only gets triggered every second?
It uses a step-up switch regulator and is designed to run on common AA batteries for longer periods and also counts with a wireless transceiver for long range communication!