Simple RF M4 Receiver Battery Question Moderators: adafruit_support_bill, adafruit

[ryguystye]

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.

[adafruit_support_bill]

That should work. Not sure what the battery life would be - I haven't measured the current draw from one of these receivers.

[ryguystye]

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.

[adafruit_support_bill]

I'll try to hook one up this afternoon and measure it for you.

[arctic_eddie]

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.

[adafruit_support_bill]

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.

[arctic_eddie]

Oops, I was thinking of the transmitter.