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Voltage ramp circuit

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Gordon McLeod

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Ok this is my first post so I hope I have put it in the right place
I am redesigning a dimmer we build in the past it ramped using a integrator between off and full output with the time constant set in the integrator
currently I am trying to get it to ramp between different levels but the integrator seems to only work between the two extremes
I have been using the LM324 as it has two unused opamps from the rest of the dimmer circuit
any help is appreciated
thankyou
 
Can't help without a schematic.

"A picture is worth 10,000 words".
 
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