So im planning to use arduino uno to get data from sensor and turn on the pump for a few seconds before the sensoor make another reading to determine whether to turn off the pump. So i use any of electric parts laying around to finish this project. I use my internet knowledge to make this circuit […

Ok, I like that you are thinking about this, well done for that. [image] beginnersluckk: Ohhh okay... I thought it would protect the digital pin from voltage spikes Read this: Flyback diodes and why you need them The diode gets rid of the spikes. Also, in a MOSFET the gate is isolated from …

[image] Here is my arduino uno. Its not original i hope its okay

Hii beginnersluckk! Although the circuit seems perfect but i would recommend to use a relay to turn on and off your pump and for the control part you should definitely go with an optocoupler which will help you to isolate your control circuit with powercircuit. and you will not loose your arduino a…

Tiny thing, but R1 should be on the Arduino side of R2.

Yes you can use 12v power supply on arduino. which sensor you want use on your project... :question: whats your plan to make from arduino :question:

Bad circuit. R1 needs to go to the port pin. The way you have it drawn is all over the internet and it is wrong. You are forming a voltage divider reducing the gate voltage which in return reduces the MOSFET enhancement. You have picked a good part that will work as you have drawn it. You probably d…

Be careful when using the power plug or Vin. Powering through Vin or the power jack means that the Arduino and all peripherals that are on the 5V rail are powered by the onboard 5V regulator. The on board 5V regulator is not heat sinked so will supply limited current before it overheats and shuts do…

[image] Ohh, Is this how its supposed to be? I changed the symbol for the transistor because i realized that its wrong. This is the full circuit for arduino to power supply and the water pump. I dont think i will use relay because its pretty expensive. Is optocoupler a must? my project is that ard…

[image] Ohh, i just realized that i was making a voltage divider! Thanks. I have made the full circuit because i feel like i didnt explain good enough. Should i use relay? i didnt feel like i need to use them because the pump is DC and only 12V.

[image] gilshultz: You probably do not need D2 with this MOSFET Hello @gilshultz , I suggest you have a look at this: Flyback diodes and why you need them - #6 by PerryBebbington

[image] beginnersluckk: Should i use relay? You don't need a relay unless you want isolation. Even then you can use a MOSFET with an opt-coupler to get isolation if required. The only problem with your circuit is as mentioned by @groundFungus in reply #7, be very careful feeding an Arduino w…

Controlling 12V 2A Max DC Water Pump With Arduino Uno

Projects General Guidance

PerryBebbington January 28, 2023, 10:48am 10

Hello @gilshultz ,
I suggest you have a look at this: Flyback diodes and why you need them - #6 by PerryBebbington

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Controlling 12V 2A Max DC Water Pump With Arduino Uno

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