Hi;
I would like to make a timer for a DC motor driven pyrotechnic wheel.
It will be triggered from a pyrotechnic firing system at the right time in the show. The system has a 24 volt output of unknown polarity and will be lighting the pyrotechnic devices on the wheel.
After lighting the devices I need a short delay about 1/2 sec. Then I need to start the motor and a varible timer to shut the motor off after a 1/2 min. up to 2 mins.
I was thinking of sending the 24 volt fire power of unknown polarity to a bridge rectifier feeding an opto 4N35? then to a RC circuit that starts a 555 varible timer after the short delay. The 555 will power a relay that turns the motor on and off.
The hole thing will be running off a 6 or 12 volt battery.
Any other thoughts for the simplest way to get this done?
Would somone be willing to draw this up for me?
Thanks Andy
I would like to make a timer for a DC motor driven pyrotechnic wheel.
It will be triggered from a pyrotechnic firing system at the right time in the show. The system has a 24 volt output of unknown polarity and will be lighting the pyrotechnic devices on the wheel.
After lighting the devices I need a short delay about 1/2 sec. Then I need to start the motor and a varible timer to shut the motor off after a 1/2 min. up to 2 mins.
I was thinking of sending the 24 volt fire power of unknown polarity to a bridge rectifier feeding an opto 4N35? then to a RC circuit that starts a 555 varible timer after the short delay. The 555 will power a relay that turns the motor on and off.
The hole thing will be running off a 6 or 12 volt battery.
Any other thoughts for the simplest way to get this done?
Would somone be willing to draw this up for me?
Thanks Andy
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