Power supply suggestion (12V - 5V)

Thread Starter

Lucky-Luka

Joined Mar 28, 2019
101
Hi all
I am thinking about designing a PIC development board similar to this one:
https://www.rhydolabz.com/developme...-development-board-mini-rhydolabz-p-1928.html
I was thinking about 12V 3A power supply for it like this one:
https://www.amazon.com/Chanzon-Swit...rds=power+supply+12v+3a&qid=1608659328&sr=8-3
I would like to design a motor driver board to complete this kind of demo board. I was thinking about dc brushed motor and servo motor that usually work at 5-6V and stepper motor at 12V.
What do you think the power part should look like?
Maybe a buck converte 12v-6v and a low dropout regulator to power the PIC and other peripherals at 5V?
The power part of the aforementioned board I think is not the best solution...
https://www.rhydolabz.com/documents/SCH-0226 Schematic1.pdf
Any suggestions will be greatly apreciated.
Regards
 

LowQCab

Joined Nov 6, 2012
502
In order for anyone to make any suggestions about a Power Supply,
you will have to give all of the specifications of your Motors,
what the Motors are driving,
the Locked-Rotor Current of the Motors,
what type of Over-Current Protection the Motors may need,
and how this project will be powered, (Battery or Mains).
Also, what is the intended purpose of this Project,
and what type of environment will it be used in.
And, a few other items I probably left out.
 

Thread Starter

Lucky-Luka

Joined Mar 28, 2019
101
I thought that pointing out the development board and the power supply these points were clear.
I have to say that I am still in the specifications phase of the project but I thought about a development board to let college students experiment what is taught in an embedded course without the need of connecting everything to a breadboard every time.
Mains powered through a 12V switching power supply adapter.
A DC motor driver for 2 brushed DC (3-6V) motors stalling will need less than 2A more or less (I was thinking TB6612FNG as driver)
A servo motor like MG995 (5-7V) will need 1.5A stalling more or less
A NEMA17 stepper motor (12V) will need less than 2A (I was thinking A3967 as driver)
I don't think that everything needs to work at the same time or I will need 5 amps or more... This is a topic I still have to discuss with my professor. I am just starting to gather ideas.
 

bassbindevil

Joined Jan 23, 2014
158
12 volt power brick, and a car USB charger to get 5v 1A
There are 12v/5v bricks made for external hard drives and optical drives, but they're less common.
 
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