I am trying to build a wind speed gauge for home. I have found a bunch of designs online but they mostly use a bicycle speedometer and a look up table. Also the speedometers appear to be limited to about 9 pulses per second which apparently equates to around 100mph with a 28" wheel.
As an alternative, I have a DC motor from a small electric screw driver and I mounted my cup wheel on it. The wind has to be at about10mph before it starts to turn which is probably OK as it often gusts to 50+.
So the plan is to use a DVM and a variable resistor to adjust the readout from volts to mph if possible. Ignoring any decimal points.
The thing I would really like to have is the highest speed recorded. How would I go about storing the highest voltage achieved since the last reset?
I can build kits etc but I am hopeless at design so a schematic would be good.