Hi, I'm clueless when it comes to electronics so bear with me. I want to control the intensity and polarity of a series of electromagnets (at the same time if possible) on an ATmega328 microcontroller and I cannot figure out the setup. Can anyone help me? Where do I start even? What pins do I use?Do I need a driver, a darlington transistor array or a mosfet transistor array, or a H-brigde? I don't know the difference...starting at the beginning. Each electromagnet is powered with a 12V DC power supply, consumes 3 watts, and has two connecting leads. Any help is greatly appreciated.
Could you link me to a specific model of the part so I can have a look? Increasing and decreasing the intensity will be of most importance...
So is type of H-bridge? What is the maximum number of 12V electromagnets do you reckon I can run off this shield? I was hoping for at least 3-4....but I see it says you can control two DC motors with this....is that the same for electromagnets?
Also I was hoping to run an RGB LED strip off the same microcontroller. I've been told it uses two SPI pins and two Power pins. Is this possible? I've attached the pins list - maybe someone can help me figure out if there is enough space for these?
Increasing and decreasing the intensity will be of most importance...
I don't think you need an H-bridge.Are you planning to reverse the magnetic direction of these electromagnets at all ? If not, then you don't need an H-bridge.He did state:QuoteI want to control the intensity and polarity of a series of electromagnets (at the same time if possible)[/color]You are very keen on varying the intensity. You may be disappointed with the outcome there, because of the way thatelectromagnets behave. Are you trying to pick things up ?If you want to vary the electromagnet current, the best approach would be to find a suitable transistor to implementlinear current control. A big audio transistor would probably be the best place to start looking.
I want to control the intensity and polarity of a series of electromagnets (at the same time if possible)
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