Recent content by eegeek

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    Designing an Efficient RC Circuit for Linear Ramp Control

    @yungman: Thanks! Would you mind a quick sketch for this novice? "I still don't quite know what you are trying to do. Do you mean you want to achieve a soft start by using a linear Ramp to ramp the voltage from 0 to 24V across the solenoid to create a soft start. Then when you want to turn off...
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    Designing an Efficient RC Circuit for Linear Ramp Control

    Thanks all for the helpful replies...
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    Designing an Efficient RC Circuit for Linear Ramp Control

    @NascentOxygen: The solenoid is used for steering a large equipment and a sudden step input might result in jerk resulting from force needed to overcome the moment of inertia (infact an exponential voltage coming from series RC circuit might do the same). Hence the soft start..Do you have a...
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    Designing an Efficient RC Circuit for Linear Ramp Control

    @DragonPetter: You're right. I actually have to use a 8Ω resistor anyway to have a current of 1.6A at the solenoid coil (7Ω) from a 24V DC source. So my circuit currently has a 24V source in series with an 8 ohm resistor, a .056 F capacitor and the coil. Of course linear ramp is difficult here...
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    Designing an Efficient RC Circuit for Linear Ramp Control

    The coil can take upto about 1.6A..
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    Designing an Efficient RC Circuit for Linear Ramp Control

    Thanks DragonPetter for the quick response! This equation looks more like the one for RC discharging circuit. And to achieve constant current source, I connect a resistor between voltage source and capacitor?
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    Designing an Efficient RC Circuit for Linear Ramp Control

    Hello! I'm trying to activate a solenoid with a linear ramp in voltage of 0 - 24VDC in 2 seconds. An RC series circuit helps achieve soft start but in an exponential way (with 63% of supply voltage in 1 time constant). Can I use a single circuit for charging and discharging? (linear ramp down...