Hi. I need help for my final project in school. Please forgive my ignorance on electronics because I am a physics major.
My professor has asked me to make a system for electroplating using PIC as the main controller of the circuit. Its function goes like this:
I have three electrodes A, B, C. All are immersed into a chemical solution. A and B will be connected to a power supply (output). A and C are connected to a voltmeter (input). Then I will specify the duration of plating and reference voltage (for example, 3 minutes on constant 5V DC). But during the process, the resistance of my solution will vary and the voltage between A and C will not always be 5V. Manual adjustment of the power supply is not advisable because the changes are very small and very quick. PIC will provide the automation by measuring the voltage between electrodes A and C compare it with the reference voltage (5V), and will compensate for the changes in resistance by providing a higher or lower output on electrodes A and B. After the specified duration (3 minutes), the power supply will either shut off or the output will be 0V.
I only need a voltage range from 0 to 12V DC. I think the whole system is just like a variable DC power supply similar to the one posted on this thread:
https://www.electro-tech-online.com...-supply.7110/?highlight=variable+power+supply
But instead of the potentiometers, the output is controlled by the PIC. Also, I think it is possible to use the comparator of PIC. Compare the voltage on electrodes A and C and the reference voltage. If higher, decrease the output. If lower, increase the output.
If there are questions regarding my project, I would gladly explain it. Please help. Thanks in advance.
My professor has asked me to make a system for electroplating using PIC as the main controller of the circuit. Its function goes like this:
I have three electrodes A, B, C. All are immersed into a chemical solution. A and B will be connected to a power supply (output). A and C are connected to a voltmeter (input). Then I will specify the duration of plating and reference voltage (for example, 3 minutes on constant 5V DC). But during the process, the resistance of my solution will vary and the voltage between A and C will not always be 5V. Manual adjustment of the power supply is not advisable because the changes are very small and very quick. PIC will provide the automation by measuring the voltage between electrodes A and C compare it with the reference voltage (5V), and will compensate for the changes in resistance by providing a higher or lower output on electrodes A and B. After the specified duration (3 minutes), the power supply will either shut off or the output will be 0V.
I only need a voltage range from 0 to 12V DC. I think the whole system is just like a variable DC power supply similar to the one posted on this thread:
https://www.electro-tech-online.com...-supply.7110/?highlight=variable+power+supply
But instead of the potentiometers, the output is controlled by the PIC. Also, I think it is possible to use the comparator of PIC. Compare the voltage on electrodes A and C and the reference voltage. If higher, decrease the output. If lower, increase the output.
If there are questions regarding my project, I would gladly explain it. Please help. Thanks in advance.
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