Hi. I've shortly begun to learn electronics because of my interest in learning to produce the controversial colloidal silver. I've actually been making CS for some time without using a circuit but only a potentiometer to reduce the current from a 32v - 1a printer wall-adapter. Polarity reversal to balance the use of each electrode and to prevent oxidation/blackening on electrodes is tedious manually.
What I've been searching for on the web is a diagram of circuit for producing around 30 volts DC, 0.5 ma, and about 30 seconds of alternating polarity periods. Actually, it would be good if each of these three values (especially current and reversal time) were adjustable; for instance, 0 to 2 ma and 10 to 60 seconds, but for a beginning, I need to be able to build on a breadboard the diagram for the fixed values and then, I think, I can experiment with resistors, pots and capacitors to make it adjustable.
Currently, I don't have the knowledge to design the diagram I need. I'm just enthusiastic about following a ready diagram, building it on a breadboard and securing it in a box for use. But I couldn't find the specific diagram I need, something as simple as possible.
In the beginning of my web searches, it seemed that the circuit would need to use a 555 timer with a relay. Then, I read that an h-bridge without using a relay would be easier and better due to a relay's sound, potential quick wearing, etc.
I made a search on this website (and some others) for similar help requests for CS makers but couldn't find something specific or very similar to the one I seek. I'll be grateful if someone here can provide the diagram I seek.
What I've been searching for on the web is a diagram of circuit for producing around 30 volts DC, 0.5 ma, and about 30 seconds of alternating polarity periods. Actually, it would be good if each of these three values (especially current and reversal time) were adjustable; for instance, 0 to 2 ma and 10 to 60 seconds, but for a beginning, I need to be able to build on a breadboard the diagram for the fixed values and then, I think, I can experiment with resistors, pots and capacitors to make it adjustable.
Currently, I don't have the knowledge to design the diagram I need. I'm just enthusiastic about following a ready diagram, building it on a breadboard and securing it in a box for use. But I couldn't find the specific diagram I need, something as simple as possible.
In the beginning of my web searches, it seemed that the circuit would need to use a 555 timer with a relay. Then, I read that an h-bridge without using a relay would be easier and better due to a relay's sound, potential quick wearing, etc.
I made a search on this website (and some others) for similar help requests for CS makers but couldn't find something specific or very similar to the one I seek. I'll be grateful if someone here can provide the diagram I seek.