Connecting 2 Heathkit weather stations to 1 remote sensor boom
 
Several individuals have asked me for a way to connect multiple weather stations to a single remote sensor boom. The following circuit will isolate the weather stations from each other while using the same wind speed and wind direction sensors. In each case, you should always use separate temperature and/or humidity sensors.

The diodes used can be any type of signal diode capable of isolating a 5 volt signal. I used 1N4148's. You can mix any combination of ID-4001's or ID-5001's, or even the ID-1890 Digital "Wind" computer.
The left connections are to the Sensor Boom, the right top connections are to the "master" weather station, and the right bottom connections are to the "slave" weather station.
The "master" weather stations provides the power to the LED's located inside the wind speed/direction modules and must be powered up for either weather station to work. Do not attempt to modify the circuit to allow for either weather station to drive the LED's.
I have tried this circuit with two ID-4001's, two ID-5001's and a mix of one ID-4001 and one ID-5001. I have not tried to drive more than two weather stations, but I suspect it may work as well.