I was wondering if it would be possible to control the speed and direction of a 12v DC motor with out the need of user interaction. In the project I am working on I require 3 12v pumps, and I need each to pump varying amounts of liquid. How would I go about doing this? Thank you.
I am trying to automate a small living fish tank I have, but some of the supplements that I need to add, I only need a few drops at a time. The pumps are rated for 20-60 ml/min so what I really want to do is just slow the pump as much as possible and do a little bit of experimentation in terms of how long the pump should be on. Would this be a viable, accurate, option? After the liquid is pumped, I would like to reverse the direction of the pump and any liquid in the line to the container they are stored in. I’ve been looking that an H bridge could be an option, but all I can find is ones with user interaction per a button. I want to incorporate a DS1307 RTC in order to keep the nutrients on a weekly and bi weekly schedule. Thank you for reading.