hello,
i want to learn pid analog circuit from where should i start?
i want to learn pid analog circuit from where should i start?
Yes, a large power resistor with significant thermal mass makes an interesting challenge to optimize the control loop parameters such that the temperature will rapidly reach the control temperature without overshoot or hunting (oscillation).......A temp sensor glued to a power resistor is a really simple "plant" you can build- try to control the temperature.
I want to say I very much appreciate the good replies from our members to your question. They add to the forum and I frequently learn from them as well.hello,
i want to learn pid analog circuit from where should i start?
Another good plant, which is very similar, is a temp sensor glued to a 60 W incandescent light bulb. It gives you a nice visual indication of whether your system is operating in the ballpark (though of course you won't see high frequency oscillations).Build a simple circuit with an opamp- with only "P" - proportional control.
Get the feel for how it works, then add circuits for the I and D as you learn more.
You need a "plant" - something to control that has an input and an output.
A temp sensor glued to a power resistor is a really simple "plant" you can build- try to control the temperature.
where is circuit?Another good plant, which is very similar, is a temp sensor glued to a 60 W incandescent light bulb. It gives you a nice visual indication of whether your system is operating in the ballpark (though of course you won't see high frequency oscillations).
This is a really cool idea, I'm going to try this next. Thanks!Yes, a large power resistor with significant thermal mass makes an interesting challenge to optimize the control loop parameters such that the temperature will rapidly reach the control temperature without overshoot or hunting (oscillation).
A quad op amp, such as an LM324 can be used to easily generate the proportional, differential, and integral functions.
The required time-constants for the integral and differential functions will be in the ms to seconds region.
Should be a good learning experience.
Build one of these.hello,
i want to learn pid analog circuit from where should i start?
How does this meet the Thread Starter's goal of Analog PID? And that's Analog PID.Build one of these.
This image the board is missing the opamp, the Pot, and the 2-digit 7-segment display i have for feedback.
What this does is adjust the brightness of the 3-led's by controlling the PWM of the MCU output through an RC-filter, the op-amp gets its feedback from a low ohm (i forget just now, maybe you can read the blue resistor in the image) current feedback resistor, amps it up, feeds it to the MCU, which then determines how much current the LED's are consuming, then the MCU does whatever it wants with it.
The POT is how you tell the MCU how much current you want the LED's consuming via the MCU Analog to digital converter.
I'll post a more up to date pic later tonight from home.
I would gladly sell you one of these boards and component sets at cost and share my circuits with you if you promise to share you findings with me. I had to buy in qty of 10 for the boards, and the components (most of them) were almost the same cost for 10 as they were 1.
Undermined by Google!I want to say I very much appreciate the good replies from our members to your question. They add to the forum and I frequently learn from them as well.
But I have to ask again, why can't you search for some of this yourself? Pasting your exact question text into Google got lots of good hits on this very subject. Our members are talented and generous but it is unreasonable to continue to expect that they will continue to do your work for you without complaint. Your continued participation at AAC will depend on you taking some initiative and finding things out for yourself before dropping random questions here.
It is as simple as this.
perhaps i misunderstand the semantics. Using a microcontroller to control an analog load with software PID in my mind would be Analog PID, but I think I get where I went wrong on that.How does this meet the Thread Starter's goal of Analog PID? And that's Analog PID.
Analog PID has gone the way of flying governors but they are still good for teaching /learning experiences. Cheers!perhaps i misunderstand the semantics. Using a microcontroller to control an analog load with software PID in my mind would be Analog PID, but I think I get where I went wrong on that.
Analog PID would refer to using discrete components to create a PID controller, without an MCU or digital software.
Had to think that mess through. appreciate the clarity.
I believe so.Is the OP Ritesh?
by Aaron Carman