Hello
I am very much a beginner when it comes to electronic circuits, as I only started researching various circuit designs less than 1 month ago. My father has cancer and I am trying to build a circuit for the electrolysis of silver.
Through trial and error I have managed to build a PWM module for a magnetic stirrer, Developed a Constant Current Circuit that adjusts down to a needed 1ma and a Square Wave timer circuit that will switch on an off 3 times a second up to every 10 minutes.
However, I am having trouble creating the “Reverse Polarity Circuit” to tie in with my timer so I can alternate my Positive and Negative wires based on the time adjustment. Since the 1ma is a must I have not been able to find a circuit that simple switches the positive and negative polarity, does not effect the adjusted current and will support as little as 1ma. I have looked at various H-Bridge designs, but they either do not appear to support 1ma or I have not been able to get them to work as designed.
I would greatly appreciate anyone that could please provide any help or at least point me in the right direction. I am running out of time and could use some guidance from someone that actually understands what is or is not possible with electronic circuitry…
Thanks in advance for your time and efforts…
Oh and by the way my Constant Current Source is a 37V Printer Power Supply, that I am adjusting down to between 1ma to 10ma. (More voltage will be required at the beginning of the process to maintain 1ma, but will drop as the process progresses.
I am very much a beginner when it comes to electronic circuits, as I only started researching various circuit designs less than 1 month ago. My father has cancer and I am trying to build a circuit for the electrolysis of silver.
Through trial and error I have managed to build a PWM module for a magnetic stirrer, Developed a Constant Current Circuit that adjusts down to a needed 1ma and a Square Wave timer circuit that will switch on an off 3 times a second up to every 10 minutes.
However, I am having trouble creating the “Reverse Polarity Circuit” to tie in with my timer so I can alternate my Positive and Negative wires based on the time adjustment. Since the 1ma is a must I have not been able to find a circuit that simple switches the positive and negative polarity, does not effect the adjusted current and will support as little as 1ma. I have looked at various H-Bridge designs, but they either do not appear to support 1ma or I have not been able to get them to work as designed.
I would greatly appreciate anyone that could please provide any help or at least point me in the right direction. I am running out of time and could use some guidance from someone that actually understands what is or is not possible with electronic circuitry…
Thanks in advance for your time and efforts…
Oh and by the way my Constant Current Source is a 37V Printer Power Supply, that I am adjusting down to between 1ma to 10ma. (More voltage will be required at the beginning of the process to maintain 1ma, but will drop as the process progresses.
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