Moderator: twehr
mattrsch wrote:Thanks for the heads up!
Could you get away with a logic inverter on TL and an AND gate watching TH and the inverted TL with the output attached to the laser power supplies TH input? That way they both have to agree to fire the laser, so if reset makes TH go high but doesn't effect TL, the laser won't fire on reset. If power off lets TL go low but doesn't make TH go high, the laser won't fire.
twehr wrote:
I just posted an idea on the other forum. Why not just put an inverter (alone) between the controller and the TH. When power is removed form the controller, it will still go low, but the power to the inverter will also be removed - thus it will not go high, so no firing.
Gadroc wrote:Thanks Tim.
I'm looking into what it would take to do that. Does anyone have any recommendations on how to proceed with the not on the laser trigger signal?
Would a very simple NOT circuit work described here using the two resistors and a transistor?
1) http://www.electronics-tutorials.ws/logic/logic_4.html
2) http://www.kpsec.freeuk.com/trancirc.htm
Or will this application require more thought and require something like a schmitt trigger?
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