If you want us to help, try to put yourself in our shoes. Realize we know nothing about the specs of your linear actuator (voltage and current requirements, etc.), nothing about your comparator, or your available supply voltages. Do you want to latch the "hold-high" circuit, or do you simply need a high side switch?Basicly this is what I have. A linear actuator that I need to move up and down. The signal is coming from a comparator and pulling it high. I realize it needs to be adjusted for voltage. I'm just trying to get an idea.
I "think" I understand what you are saying. The laser is shining through the clear pipe pointed at the phototransistor, and when the (opaque) sleeve gets to the point where the phototransistor is it will interrupt the laser beam. Correct?I'm sorry I realize I am the worst when it comes to explaining things. I do not have any details on the acuators or really anything yet. I'm still super early in the design stage. Here is my plan. I am going to have a "sleve" over a clear pipe. A laser will be pointed at a phototransistor. As the voltage across the transistor goes down, it will hit a set point (via the comparator and pot). The "hold high circuit" will move the linear actuator up and the circuit will be cut off by a limit switch. Then the oppsite via the same laser and different com and pot.
Edit: I realize that there needs to be reistors in a lot of places but like i said this is just a concept design not a functional design
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by Luke James