80 cue ic firing circuit
Posted 29 September 2013 - 05:03 AM
Posted 06 October 2013 - 03:49 AM
EDIT: I think I found it, so it is a sequencer rather than a full blown firing system? What are you triggering it from?
Edited by mike_au, 06 October 2013 - 06:43 AM.
Posted 06 October 2013 - 07:39 AM
Edited by eb11, 06 October 2013 - 07:40 AM.
Posted 07 October 2013 - 06:26 AM
Are you still planning on doing it as a sequencer? and if so, have you looked into matrix switching? If you use a high side switch to drive rows and a low side like the 2803 to drive columns then you can get rows*columns cues, so 3 chips with 8 outputs each would get you 8*16=128 cues, compared to the 10 chips for 80 cues using a 1-to-1 connection.
The down side is that you can only trigger multiple cues simultaneously if they happen to be in the same row or column, which isn't a problem for a sequencer since it only fires one at a time anyway and since the 2803 can't handle all of it's outputs running at max current simultaneously you are going to have to put some limitations in place.
My first firing system was based on high current mosfets so using matrix switching made it a lot cheaper. I'm now working on a version 2 which is a bit more flexible and will have individual FETs for each cue.
Posted 07 October 2013 - 11:18 AM
I have the arduino mega running 54 cues and the I am using more megas to talk to a master to fire the cues to what I program into it. the megas are driving the 2803 with 5v outputs and the 2803 are sending 12v to the talons. I want more control over what I am firing and when the sequencer I had set up did not give me much flexiblity
Edited by eb11, 07 October 2013 - 11:19 AM.
Posted 08 October 2013 - 07:46 AM
So you're planning one uC per 54 cues? that seems like it would get expensive quite quickly
Posted 08 October 2013 - 01:54 PM
still cheaper than buying a system. the arduino cost me 60 dollars
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Posted 09 October 2013 - 07:38 AM
Fair enough, I guess it is only expensive compared to using the matrix set up, the one I'm building atm uses a high current FET per cue, so that will end up costing more than $60 for 80 cues
Posted 15 October 2013 - 10:37 AM
Posted 01 September 2014 - 05:36 PM
i was able to make 4 of these controllers for a total of 480 cues i have now just made it so i can fire them to music using the arduino megas 13 of them to be exact and the vixen software. i will do some more testing and then if anyone interested i can post the code
Posted 08 October 2014 - 05:20 PM
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Posted 29 September 2020 - 08:02 AM
Firing systems can be fun bench projects BUT... I have a matrix system that used sub-D connectors and the cable weighs enough to tilt the car -really good for 10 - 50 cues but after that it's hard going. I have wireless systems that do up to 20 cues each -much simpler and easier -all manual though.
I have a full digital system that does 64 cues per module, up to 255 modules per data line (and infinite data lines with repeaters) but it's only controllable from a computer.
It's always a matter of choosing the right one for the job in hand.
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