switching between parts circuit pulse input

  
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This is a 9V DC power source, to a 555 timer to get a square wave. Then fed through a Half-Wave Series Multiplier (Villard Cascade) to get a high voltage DC output. Ideally I want to be able to send a single pulse at 5V pulse from a micro-controller to the switch to change the resulting output of the system between those two points. I think that I
switching between parts circuit pulse input - schematic

should include basically what I am trying to accomplish with this circuit as it seems that I may have chosen possibly the wrong path to pursue. First off, I wish to be able to power the circuit off of a battery source, hence the 9VDC. What I wish to accomplish is to get a about 30-40V square wave output. I was going to add another 555 timer at the end of the diagram that I originally posted to get the square wave. So I guess it`s kind of a circuitous route to take, DC->AC->DC->AC, lol. Firstly, it is easier to have a level from a microcontroller so that high = one voltage and low = the other voltage. I don`t know if that is what you intended. Secondly, you could lower your component count a lot by using a boost converter. You can easily get a microcontroller to change the output voltage of a boost converter. I assume that you want two possible fixed output voltages, and a boost converter would be good for that. First off, I wish to be able to power the circuit off of a battery source, hence the 9VDC. What I wish to accomplish is to get a about 30-40V square wave output. I was going to add another 555 timer at the end of the diagram that I originally posted to get the square wave. So I guess it`s kind of a circuitous route to take, DC->AC->DC->AC, lol. Thanks for all your help. Im going to go with a boost converter instead with a MOSFET as the switch. All I have to do now is specify which diode and inductor to use. Any...



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