I have a motion sensor that has a relay output (I name it RL-A in my circuit).
It has a NC (normally close) output only (but not a N.O. or normally open terminal).
I like to use a DC supply (battery) of 5 volts for powering up a radio when there is motion detected by the sensor.
Because this sensor does not have a N.O output I am thinking I need to build a small circuit like showing below, which I think it should work.
So my load in the circuit is a radio that I already turn on all the time.
Question: what are the values of the resistors, R1, R2 and R3 you reckon?
how about 5K, 1K and 3K ohms?
Of course and please recommend me a "better" circuit as I know I am not a good designer for one.
Thanks for your help.
https://drive.google.com/drive/folders/0By5oEN_IgslpbTFMa3pxS0RrNkk?usp=sharing
It has a NC (normally close) output only (but not a N.O. or normally open terminal).
I like to use a DC supply (battery) of 5 volts for powering up a radio when there is motion detected by the sensor.
Because this sensor does not have a N.O output I am thinking I need to build a small circuit like showing below, which I think it should work.
So my load in the circuit is a radio that I already turn on all the time.
Question: what are the values of the resistors, R1, R2 and R3 you reckon?
how about 5K, 1K and 3K ohms?
Of course and please recommend me a "better" circuit as I know I am not a good designer for one.
Thanks for your help.
https://drive.google.com/drive/folders/0By5oEN_IgslpbTFMa3pxS0RrNkk?usp=sharing