Operate solenoid from low voltage source

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heryrg

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Hello guys,
I'm a newb here so please pardon any silly mistakes i make.
I am designing a circuit to drive a latching solenoid. It will work something like this:
I have a constant voltage signal (low voltage and low current) 700mV to 950mV.
When the voltage value will be 894mV (as of now) i want to apply a 38v signal to the solenoid.
When the voltage drops to 811mv (as of now) i want to apply a -12v signal to the solenoid.

I think i need to use the H-bridge circuit to drive a latching solenoid, some sort of high voltage amp for the solenoid voltage, and transistors for sensing the voltage and applying a signal at the right time.

I would really appreciate any help from you guys because im kinda stuck right now.

thanks
 

Do you actually mean "operate from" or just "operate depending on"?
In other words, do you have a high voltage supply?
 

I don't have a high voltage power supply. It's battery powered with 2.4 or 3.6v, not 100% sure yet.
I've played with the solenoid today and found out that the voltage needed is actually much less then the rating. To activate it in and out i need around +/-10v.

I guess my real question here is how do i transform a 100mV voltage difference to +10v and -10v? 900mv sends +10v 800mv sends -10v
thanks
 

Can anybody help me out??
 

I understand, that you have two different problems:
- processing the 700mV to 950mV in put signal
- generating a high voltage from a 2.4 or 3.6V supply

As a general answer, the first involves a comparator circuit, the second a boost converter respectively an inverting boost converter.
Both are standard electronics building blocks.
 

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