Hello All,
I am looking into using a 12 V adapter to power my UNO (and possibly a NANO later on) plus a couple devices. My devices are a linear motor and an induction heating module (DC 5V-12V ZVS) which will require more current then the Arduino can provide. I am thinking of either using transistors or relay to control the components. My question are
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Are the relays like the one I have drawn below? The idea is all power would be supplied to a 12 V power terminal and the components attached to the relays and Arduino would draw power from that.
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How would you go about doing this with transistors?
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Any other suggestions?
I would use a 12V to 5V regulator to power the Uno & Nano.
Then you also have the option to use 5V relays.
I would use MOSFETs as buffers between the Uno/Nano and the other circuits.
I have a board with 8 MOSFETs that I am just starting to provide.
It can sink 12V thru relay coils, or connect Gnd for your motor and heating module.
I designed it so that the MOSFETs can be controlled from an on-board shift register, from an on-board buffer to accept 3.3V or 5V inputs, or by driving the MOSFET gates direct from an Arduino.
Screw terminal inputs, screw terminal outputs.
I assembled the first 6 last night, am doing another 6 tonight (10 were presold), and then I have another 8 boards I can assemble (but have to get some more parts, need to check how many I ordered).
Hello and Thanks for the reply.
I am not ready to buy right now, but in general how much would something like this cost? Are the alternatives with less MOFSETs (I think I only need 4 at most)
Also I think I generally get the concept behind what you are showing, but to confirm the board just has multiple built in MOFSETs that can be controlled with the Arduino. A couple additional questions (I am not very familiar with these things so sorry if there are any not so great questions)
- Would my power supply screw into the top left of the terminal marked as 12 to 30 V? Would
doing so supply power to all of the MOFSETs
- How does the Arduino interface with the board. Can it draw power directly from it? How would
I complete the circuit for each of the digital output pins used to control each MOFSET
- Would the outputs each just be connected to the terminal listed as output on the top right. For
example would it be as easy as connecting the positive end of the heater to 1+ and the
negative to 1-
