Switch to PIC to Transmitter Interface
Switch to PIC to Transmitter Interface
(OP)
Hi, i'm Matt from the British Royal Navy. I need to design and build a Transmitter unit controlled by a PIC with several switch Inputs.
A more detailed description of my proble is that i have to build a water propelled rocket. I'm designing the control side of things. I need to be able to remotely actuate a compressor to fill up the bottle and then stop the compressor. I also need to be able to abort the launch of the rocket and be able to remotely actuate the release mechanism. On top of all that, i need to be able to remotely control the azimuth and elevation of the launcher.
If you have any ideas/suggesions on the technical side of things, i would be most grateful.
Cheers.
A more detailed description of my proble is that i have to build a water propelled rocket. I'm designing the control side of things. I need to be able to remotely actuate a compressor to fill up the bottle and then stop the compressor. I also need to be able to abort the launch of the rocket and be able to remotely actuate the release mechanism. On top of all that, i need to be able to remotely control the azimuth and elevation of the launcher.
If you have any ideas/suggesions on the technical side of things, i would be most grateful.
Cheers.





RE: Switch to PIC to Transmitter Interface
Inputs : Compressor pressure Digital/Analog??
Release mechanism Position feedback DI
Elevation feedback AI
Azimuth (AI ??) Expand what this is pls.
Outputs : Compressor Start DO
Release mechanism DO
Elevation Control AO
Azimuth control AO
If you could post a small drawing of the system that can help. What type of PIC are you using. Important will be the amount of ports avaible . You might need a couple of external devices for your analog control. The Analogs you can bring in on a singled port and in your source code scale it to a value which is usable.
Any additional information can help, but start with a system schematic, showing parts used ect.
Regards
Rheinhardt
RE: Switch to PIC to Transmitter Interface
RE: Switch to PIC to Transmitter Interface
I/P: Analog Compressor. Azimuth is like the bearing on a compass, its a direction, i have to be able to control the bearing of the rocket(Sorry my fault, Naval terminology). I'm using an alpha-numeric display to indicate the bearing and elevation via feedback from the launcher.
Im using a PIC 16f876, i know its not very good, but its extremely cheap and has the right amount of pins for what i need. I'm using an esay radio ER400TRS transceiver, because seperate Tx and Rx will require an expensive device to allow them to use just one aerial. The box is very small as well.
Will try and get a diagram ASAP
Cheers
RE: Switch to PIC to Transmitter Interface
www.maxstream.net
Xbee modules....small...serial uart interface. Just send data back and forth.
RE: Switch to PIC to Transmitter Interface
RE: Switch to PIC to Transmitter Interface
As far as controlling the launcher...isnt this going to be a seperate circuit? Or is the bottle fill/stop control located on the launcher unit as well. To get elevation information just use a accelormeter to measure that.