Hi folks
I recently acquired a WT588D-16p audio playback module that I'm getting acquainted with as I have a few prop related fx systems that require sound fx:
I thought I'd start with domething simple and make a prop blaster fx board and I'm trying to work out how to integrate it so it triggers an nfet/monostable circuit for controlling a high current LED used for the mozzle flash effect.
My knowlage is still under development so I'm pretty much just going through a prelim to make sure I have my thinking straight but any suggestions for things I havent thought of, or a simple yay or nay would be most appreciated.
My Setup
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The module is set to button trigger mode for the fx system I'm working on. The module is a 5v device and the button pins measure approx 4.5v when floating and 2.6v when pulled to ground.
I then got to thinking about tying a path to one of the the buttons directly but as the pins are only 2.6v when closed circuit, it isn't going to be enough for the 555 trigger, so I thought something like the LP2992 logic level nfet could be used to tap 5v from the modules power rail as a monostable pre trigger.
I made this quick schematic of that particular juction:
However, I have little faith in the above diagram as it looks like I've just gone and given the floating a pin a path to ground via the gate's pulldown resistor, which I'm guessing will automatically trigger the pin when power is applied. Useful to know for other projects but no good in this case.
The only place I can think of to go from there is on the buttons negative side to ground as indicated by the arrow in the pic below:
Again, my faith is a little shaky and not sure if it'll work as intended.
I hope so as I was then going to use the monostable to trigger a second nfet that controls the high current LED for the muzzle flash effect.
I recently acquired a WT588D-16p audio playback module that I'm getting acquainted with as I have a few prop related fx systems that require sound fx:
I thought I'd start with domething simple and make a prop blaster fx board and I'm trying to work out how to integrate it so it triggers an nfet/monostable circuit for controlling a high current LED used for the mozzle flash effect.
My knowlage is still under development so I'm pretty much just going through a prelim to make sure I have my thinking straight but any suggestions for things I havent thought of, or a simple yay or nay would be most appreciated.
My Setup
----------------
The module is set to button trigger mode for the fx system I'm working on. The module is a 5v device and the button pins measure approx 4.5v when floating and 2.6v when pulled to ground.
I then got to thinking about tying a path to one of the the buttons directly but as the pins are only 2.6v when closed circuit, it isn't going to be enough for the 555 trigger, so I thought something like the LP2992 logic level nfet could be used to tap 5v from the modules power rail as a monostable pre trigger.
I made this quick schematic of that particular juction:
However, I have little faith in the above diagram as it looks like I've just gone and given the floating a pin a path to ground via the gate's pulldown resistor, which I'm guessing will automatically trigger the pin when power is applied. Useful to know for other projects but no good in this case.
The only place I can think of to go from there is on the buttons negative side to ground as indicated by the arrow in the pic below:
Again, my faith is a little shaky and not sure if it'll work as intended.
I hope so as I was then going to use the monostable to trigger a second nfet that controls the high current LED for the muzzle flash effect.