I am kind of new to this community and the world of small electronics, so let that guide the way you read this question. I plan to build a motorized projector screen using an Arduino Uno. I will add a Bluetooth module (HC-05) to control a DC 12V motor rated at 0.92A to roll the screen, and a potentiometer will read the rotation. Also, I have a separate DRV8801P motor controller for the DC motor.
My question relates to power. I have a 12V/1A outlet adapter, which I planned to use to power both the Arduino (and Bluetooth module), as well as the motor controller and DC motor. However, I'm wondering if the 1A current will be enough for both the motor and the Arduino when the motor will be in use. My idea was to power the Arduino directly from the 12V/1A, and the same adapter (using an adaptor splitter) would power the motor controller. The power to the motor controller would be switched on/off using a relay switch that is controlled using the Arduino, but I don't think that matters to the discussion.
I apologize for not providing a schematic of the circuit, but I cannot download software to the laptop I am currently using, and couldn't find an online option.
Thanks for the reply. I suppose I shouldn't encounter any issues with splitting the current between the Arduino and the motor controller in that case, correct?
luismsfern:
I suppose I shouldn't encounter any issues with splitting the current between the Arduino and the motor controller in that case, correct?
Well, yes and no.
First point, unless you have a "shield" for the UNO that already does everything you want, a UNO, being the "demonstration" version of the Arduino, is not very practical for actual projects. A Nano will be more useful, easier to assemble onto a protoboard/ stripboard/ solderless breadboard/ custom PCB. And somewhat cheaper to boot.
Next, don't use 12 V to the "barrel jack" or "Vin". Particularly if you want to use a relay module, you need a proper 5 V regulated supply, powering the "5V" pin on the Arduino and the relay module. Either a separate mains supply, or a switchmode "buck" regulator from your 12 V supply.
Thank you both for the support. I am actually planning on constructing my own "Arduino" from its separate components, and keep the UNO for future projects, mostly for cost effectiveness. I will look into the buck regulator so feed the Arduino 5V port in that case.
luismsfern:
I am actually planning on constructing my own "Arduino" from its separate components, and keep the UNO for future projects, mostly for cost effectiveness.
Basically, a major waste of time.
Buy a Pro Mini clone. Actually, buy a few. You will find it quite difficult to get the separate components cheaper, even before the PCB. The Pro Mini clone is the cost effectiveness.
And yes, put the UNO away for the time between remote and never when it is actually appropriate. Basically, only if there is a "shield" for it which does everything you want without adding other parts.
The major reason for putting together you own Arduino variation from separate parts is the Frank Sinatra principle. Not to be confused with CrossRoads' reason for making his own boards - he makes them in quantity to sell.
I also make boards for personal projects. Just don't feel the need to put sockets on perfboard and do all the wirewrapping like I used to, especially when thru hole parts are disappearing, at what seems to be an increasing rate.
Buy a Pro Mini clone. Actually, buy a few. You will find it quite difficult to get the separate components cheaper, even before the PCB. The Pro Mini clone is the cost effectiveness.
And yes, put the UNO away for the time between remote and never when it is actually appropriate. Basically, only if there is a "shield" for it which does everything you want without adding other parts.
The major reason for putting together you own Arduino variation from separate parts is the Frank Sinatra principle. Not to be confused with CrossRoads' reason for making his own boards - he makes them in quantity to sell.
Thanks for the advice, I'll keep that in mind for next time. I already bought the individual components, and since this is new to me, I don't mind putting my feet in the mud a little
