Oregon WMR928 1 wire rain gauge conversion

Very carefully remove the Oregon circuit board ,there are two screws holding the circuit board in place. You will need to make a back plate to hold a small reed switch, use existing circuit board to mark out your holes on your new backplate , use the screws you removed earlier to hold the back plate in place, solder two wires one at each end of the reed switch,then connect these wires to the counter. I have fitted a halogen bulb inside the casing this is controlled by a thermostat it will help to stop the rain gauge from freezing.

I am using a 12v 10W halogen bulb this will maintain a constant temperature and switches in and out when it reaches the setpoint,the thermostat control was brought in a kit form from Maplin Electronics £4.99.