Simple RF M4 Receiver Battery Question
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Simple RF M4 Receiver Battery Question

by ryguystye on Mon Mar 04, 2013 2:20 am

I'm trying to do a little wireless buzzer cat collar project and I'm interesting in purchasing the Simple RF M4 Receiver and the keychain fob. I was hoping to wire receiver to a small piezo buzzer and a battery (maybe two 3V coin batteries in series). Would this setup work as a viable alternative to those key-finder keychain beepers? I'm kind of a noob when it comes to circuits and such, but I have put together some arduino stuff before.
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Re: Simple RF M4 Receiver Battery Question

by adafruit_support_bill on Mon Mar 04, 2013 7:24 am

That should work. Not sure what the battery life would be - I haven't measured the current draw from one of these receivers.
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Re: Simple RF M4 Receiver Battery Question

by ryguystye on Mon Mar 04, 2013 8:05 am

Thanks. Is there any way you can check its current draw for me? I'd like to try to estimate any kind of battery life I'd get with various combinations of batteries so I can see if this project is even worth attempting.
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Re: Simple RF M4 Receiver Battery Question

by adafruit_support_bill on Mon Mar 04, 2013 8:59 am

I'll try to hook one up this afternoon and measure it for you.
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Re: Simple RF M4 Receiver Battery Question

by Arctic_Eddie on Mon Mar 04, 2013 1:18 pm

The highest current will occur when it's transmitting, and probably in bursts. You may have to measure it with a scope in differential mode across a series current sampling resistor.
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Re: Simple RF M4 Receiver Battery Question

by adafruit_support_bill on Mon Mar 04, 2013 4:47 pm

The receivers pull about 2.5mA @5v and 5mA @10v in standby. Any load attached to any of the output pins is added to that when activated.
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Re: Simple RF M4 Receiver Battery Question

by Arctic_Eddie on Mon Mar 04, 2013 7:30 pm

Oops, I was thinking of the transmitter.
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