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555 Timer? Input sawtooth 0-8 volts, Output pulse variable duration

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gmcjetpilot

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555 Timer? Input sawtooth 0-8 volts, Output pulse variable duration

This is what I want to do.

Input: sawtooth from 0-8 volts with freq of 30 Hz to 60 Hz

Output: a pulse when input is at a user set voltage between 1-7 volts.
The pulse output is adjustable voltage (3-9v) and duration (5uS to 2mS)

I'm flexible, it is not super critical. I just need a stable trigger even if it has some delay.

If some one can draw out a circuit I would appreciate it.
The 555 timer seems to be the way to go?

Thanks
 
Last edited:
Here is my hack. The pulse height is 8.2V. I'll let you figure out how to make it variable.
 

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I don't see the need for a 555, surely two comparators could do the job?
 
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