12v external supply?

Other Hardware General Electronics
1

Does anyone know how to calculate the input voltage of an external supply? I want to connect a 12v coin acceptor and a 12v water pump with the Arduino UNO. should I buy either a 12v or 24v external power supply?

2

Welcome to the forum

Your topic was MOVED to its current forum category which is more appropriate than the original as it has nothing to do with Installation and Troubleshooting of the IDE

3

Hi,
You can easily run it on a 12V power supply and connect it in parallel.

You can calculate the required current by adding up each of your loads.
If you send us the datasheets or links to your coin acceptor and water pump we can help you calculate the amperage.

1 Like
4

thank you for your reply! Is it okay to use a voltage stepper to step down the voltage as I already have a 24v power supply at home? I know there is an LM2596 DC-DC module but I am not sure about it.

5

Welcome
If you want to run motor pump through arduino I personally recommend you to use relay module and connect a adapter to relay for better protection

6

Also if you want to control two things:-

  1. If you want to control both individually add 2 relay
  2. 12V power supply is enough connect it in parallel
7

thank you very much!!

8

My project where I need to use:

  1. servo motor *2 (4.5v-6v)
    2 . water pump (12v,6A)
    3 . 42 stepper motor (3.3v)
    4 . coin acceptor (12v)
  2. 12v relay module

is that enough to use a 12v, 6.5A DC adaptor?

9

Cannot supply enough current. The water pump itself uses 6A, let alone the 42 stepper motors

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10

I finally understand. Thanks a lot!
so now should I buy an adaptor with 12A if I need 11A from adding up all my device?

11

You need to add up the peak current requirements of all of your devices to determine the maximum current requirement. Then you need to buy a suitable power supply.

By suitable I do not mean one that can only just about supply the expected peak current, but one that can supply say 50% more that that to allow some leeway in the calculations and performance

12

I see, thank you!

13

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