Alright, looks good I'll breadboard this and play around with it. I still have to put together a 12 vdc voltage regulator, maybe an LM7812. Thanks again Dan and everybody else you all have been really helpful.
Dan P
Thanks for all the help guys. What would I use for the U1 voltage regulator. I'm going to power the circuit from a garden tractor, probably 13-15 vdc when running.
Thanks Supercap2F I'll give it a try and let you know how it works out, I appreciate the help. I was an avid electronic experimenter back in the 60's, 70's and 80's but have not fooled around with it much since, will be fun to get back into it again.
I have an aneometer that puts out 0-2vdc. I want to monitor that voltage and trigger an alarm when the voltage gets below 1.5 vdc. Anybody have sugestions.
Thanks