Battery Conservation?

[unix60959]

Hello EDAboard,

I have a simple question, I'm currently working on a project where the more battery life the better. The device i'm working on requires an RF transmitter controlled by a micro-controller. I was wondering if it would be worth using an I/O pin on the controller to 'turn on' the transmitter via some relay/optocoupler in attempt to decrease battery draw. The transmitter only transmits when a specific condition is met which may be no more than once a month or less. Do you guys think that this would signigantly improve battery life or other wise reduce current draw?

thanks,

unix60959

 

[chuckey]

Without knowing what percentage of the power drawn is down to the transmitter and down to the other electronics , its hard to say. Can't you switch the whole kit off say for one minute then on for one minute.? Using a CMOS NE555 and a MOSFET Vcc switch should only be a few micro watts extra and double battery life!!
Frank

 

[dick_freebird]

Power management is the done thing in all personal
portable electronics, and there's no reason it wouldn't
help you. The trick is in cutting power "there" without
increasing power "here", so to speak.

If you're going to the trouble you might look even more
broadly at the system, take advantage of as many
power-shedding options as you can.