darb1972
Senior Member
Hi All (and particularly Manuka if you are lurking)
I have a client (my Father actually, so this is yet another love job) who wants to turn on/off an Electric Fence Generator using a handheld RF remote control from anywhere on his property. It's not a big property so worst case as the crow flies is around 400m from the Dairy. The location of the transmitter has LOS (Line Of Sight) to most of the boundaries with only two trajectories with another building in the way (around 50m from the Dairy).
I can do experiments if needed as the client is forced to be patient with me (as all Fathers are with their kids ).
I have some older Dorji modules in "stock" so I don't know if they might have the necessary range to do the job. The model is DRF7020D13 (13dBm maximum power). Being in Australia I will need to stick to the 433MHz range and hope I can use sufficient power to do the job. As mentioned, the transmitter needs to be handheld, preferably pocket sized. The receiver can be whatever I like (size/form factor etc) and it can have an omni-directional antenna (basically unity gain) on the Dairy roof. I only need to send some basic code from the likes of an 08M2 to another 08M2. He doesn't need confirmation that it worked because he also has a tester with him that will indicate if the fence is off. That keeps it nice and simple. No need for duplex or running the system in a transceiver mode. Just transmit from the handheld remote the the receiver.
Does anyone know what sort of range I can expect from the models mentioned above? If so, and if these are not considered sufficient (and if I am permitted to increase the power level on our 433MHz band), is there a more powerful Dorji that will do it???
As mentioned, if needed I can experiment, but thought I would run this past the forum first.
Thanks.
I have a client (my Father actually, so this is yet another love job) who wants to turn on/off an Electric Fence Generator using a handheld RF remote control from anywhere on his property. It's not a big property so worst case as the crow flies is around 400m from the Dairy. The location of the transmitter has LOS (Line Of Sight) to most of the boundaries with only two trajectories with another building in the way (around 50m from the Dairy).
I can do experiments if needed as the client is forced to be patient with me (as all Fathers are with their kids ).
I have some older Dorji modules in "stock" so I don't know if they might have the necessary range to do the job. The model is DRF7020D13 (13dBm maximum power). Being in Australia I will need to stick to the 433MHz range and hope I can use sufficient power to do the job. As mentioned, the transmitter needs to be handheld, preferably pocket sized. The receiver can be whatever I like (size/form factor etc) and it can have an omni-directional antenna (basically unity gain) on the Dairy roof. I only need to send some basic code from the likes of an 08M2 to another 08M2. He doesn't need confirmation that it worked because he also has a tester with him that will indicate if the fence is off. That keeps it nice and simple. No need for duplex or running the system in a transceiver mode. Just transmit from the handheld remote the the receiver.
Does anyone know what sort of range I can expect from the models mentioned above? If so, and if these are not considered sufficient (and if I am permitted to increase the power level on our 433MHz band), is there a more powerful Dorji that will do it???
As mentioned, if needed I can experiment, but thought I would run this past the forum first.
Thanks.