Hi,
I am trying to make a control system for my astronomical telescope dome and would very much appreciate any assistance with the wiring connections. I have purchased the items shown below which I think will do the job, however, that's were it ends. I need assistance to work out the wiring. I have attached all the info.
Many thank
Dave
Astronomical dome controller
Astronomical dome controller
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- Auto dome rotator system.odt
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Re: Astronomical dome controller
I am sure this project could be made to work, but frankly there is just too little information to give any detailed help. How did you decide on the items to buy? Was it a kit?
You will need to find out how to connect the photoresistor to the transmitter so that a change in light level causes a change in the transmitted signal. Then you need to take the output from the receiver and use this to switch a relay. The receiver (and transmitter) run on 3.3V, and I suspect that the relay module will be powered by 12V or so. If so, a transistor amplifier will be needed between the receiver and the relay.
Hope this helps
You will need to find out how to connect the photoresistor to the transmitter so that a change in light level causes a change in the transmitted signal. Then you need to take the output from the receiver and use this to switch a relay. The receiver (and transmitter) run on 3.3V, and I suspect that the relay module will be powered by 12V or so. If so, a transistor amplifier will be needed between the receiver and the relay.
Hope this helps
Re: Astronomical dome controller
Hi David,
Thank you for your reply.
I have found a way to simplify the system. The dome motor is activated with a key-fob, and if I short out the terminals of the key-fob with a relay the dome will rotate. However, in order to do this I require a light activated circuit which switches on a relay when a beam of light shines on it. All the modules I have found so far switch the relay off when the light shines on it, so I would be very grateful if you could advise on a module or circuit diagram to build one. The relay would have to have a timing circuit of say 1 - 10 secs.
Many thanks
Dave
Thank you for your reply.
I have found a way to simplify the system. The dome motor is activated with a key-fob, and if I short out the terminals of the key-fob with a relay the dome will rotate. However, in order to do this I require a light activated circuit which switches on a relay when a beam of light shines on it. All the modules I have found so far switch the relay off when the light shines on it, so I would be very grateful if you could advise on a module or circuit diagram to build one. The relay would have to have a timing circuit of say 1 - 10 secs.
Many thanks
Dave
Re: Astronomical dome controller
Have a look at the relay in the module you have. Very often the relay has one or more sets of changeover contacts (i.e. one common contact, one contact that is connected to the common one when the relay is energised, and another contact which is connected to the common one when the relay is not energised - hence "changeover"), and therefore the function of the relay can be altered by using different connections.
Re: Astronomical dome controller
Thank you David, I've managed to find a unit on line which will be perfect for the job; it's a AS3079AKT - Basic Light / Dark Activated Switch.
Many thanks
Dave
Many thanks
Dave