How long will a battery last?
Archiver
Posts: 46,084
I want to thank everyone for their help with my question
concerning the 'switching of a video signal with a relay'. With all
your help I was able to eliminate the interferane.
My next question is : Is there any way of approximately telling
how long a battery will last. I want to use a 9v battery for this
circuit--it consists of the stamp 2, the infrared module, and the
relay. The relay draws 13.8mA when latched. Assuming the relay stays
latched and no sleep commands are used, would it be worth using a 9v
battery(approx. how long will it last?). Or should I use a 9v AC
adapter?
concerning the 'switching of a video signal with a relay'. With all
your help I was able to eliminate the interferane.
My next question is : Is there any way of approximately telling
how long a battery will last. I want to use a 9v battery for this
circuit--it consists of the stamp 2, the infrared module, and the
relay. The relay draws 13.8mA when latched. Assuming the relay stays
latched and no sleep commands are used, would it be worth using a 9v
battery(approx. how long will it last?). Or should I use a 9v AC
adapter?
Comments
current you can calculate battery life.
Sid
manufacturer.
BS2 takes about 7 mA without any load (no sleep)
plus you IR module ~ 40 mA
This means about 60mA total including the relay
9V Alkaline = ~ 500mA
Usable 250mA/60 = 4 ~ 6 hours
ACJacques
charlieb83@h... wrote:
>
> I want to thank everyone for their help with my question
> concerning the 'switching of a video signal with a relay'. With all
> your help I was able to eliminate the interferane.
> My next question is : Is there any way of approximately telling
> how long a battery will last. I want to use a 9v battery for this
> circuit--it consists of the stamp 2, the infrared module, and the
> relay. The relay draws 13.8mA when latched. Assuming the relay stays
> latched and no sleep commands are used, would it be worth using a 9v
> battery(approx. how long will it last?). Or should I use a 9v AC
> adapter?
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
i've had enough problems with the battery myself
avi
--- Newzed@a... wrote:
> A 9V battery has a capacity of about 565 ma/hr. If
> you know your total
> current you can calculate battery life.
>
> Sid
>
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
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