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Topic: Is my power supply sufficient enough? (Read 1 time) previous topic - next topic

khimm19

I have a project and im using this FF. components to be controlled by arduino uno and 1 power supply.

1x 12v DC motor(https://www.lazada.com.ph/products/high-torque-12v-dc-120rpm-dc-worm-geared-motor-with-gear-reducer-turbo-motor-intl-i161675531-s197762262.html?spm=a2o4l.searchlist.list.56.172e328dOEYusd&search=1)

1x 12v DC motor(https://www.lazada.com.ph/products/550-dc-12v-21000rpmmin-07a-high-power-high-speed-dc-motor-diy-electric-tools-intl-i152146576-s180326232.html?spm=a2o4l.searchlist.list.28.9d5451909ejAIU&search=1)

2x 12v dc solenoid lock(https://www.lazada.com.ph/products/12v-dc-solenoid-lock-i141825423-s161555733.html?spm=a2o4l.searchlist.list.3.74e655f8o7DyfL&search=1)

1x servo motor (https://www.lazada.com.ph/products/oh-mg996r-torque-digital-all-metal-gear-servo-for-helicopter-car-boat-model-i1827351-s2219545.html?spm=a2o4l.searchlist.list.11.61d0568c96hfjO&search=1)

1x HC-SR04

and finally my power supply(https://www.portablepower.com/product/gs-portalac-yuasa-pxl-12090/)



My question:
*Is my power supply sufficient to control all of the components?
     a.if yes, can i directly connect it to the barrel jack of arduino?
     b.if no, can you give me specific power supply in able to control all the components.

tnx in advance

juma_yetu

Impossible to say, for at least these 2 reasons:

  • The specs for the first motor in your list only give the no-load current. You need to know the stall current, since that's what it will draw at start-up
  • The battery doesn't say what current it can supply; only gives its capacity



Robin2

That 12v 9Ah battery should be capable of powering everything. Lead acid batteries can usually supply high currents for short periods. But I can't say how long it will be until the battery needs recharging. I would assume 9Ah really means 3 or 4.

You can certainly connect the battery to the Arduino. However do NOT draw current for the other device through the Arduino.

...R

PS ... do not leave a lead-acid battery in a discharged state - it will greatly shorten its life.
Two or three hours spent thinking and reading documentation solves most programming problems.

septillion

Your "power supply"is a battery. Those 9Ah batteries can output quite a lot of current so I would say that's plenty.

And yes, you can connect it straight to the Arduino if you don't load down the 5V output of the Arduino with stuff you might not mentioned. And for the motors, speed will change a bi depending on the charge of the battery.

@juma_yetu, first point, read better ;) Second, those lead acid batteries happily do 1C which is plenty.
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khimm19

hmmm.. 3-4 hrs seems too fast.. can i use atx power supply(PSU) instead?

juma_yetu

@juma_yetu, first point, read better ;)
Actually I read fine, posted wrong. It's the second motor which doesn't give the stall current, just no-load of 0.7A.


septillion

Hehe, that's true :D But from the size you can assume it's not very power hungry. I agree, not very scientific but will do for hobby standards (and more then you want to know for industry as well...)
Use fricking code tags!!!!
I want x => I would like x, I need help => I would like help, Need fast => Go and pay someone to do the job...

NEW Library to make fading leds a piece of cake
https://github.com/septillion-git/FadeLed

Robin2

hmmm.. 3-4 hrs seems too fast.. can i use atx power supply(PSU) instead?
If that is a response to my Reply #2, I did not mean 3 or 4 hours. I meant 3 or 4 amp hours - of course if you are drawing 1 amp from the battery it amounts to the same thing. Unfortunately battery manufacturers are very optimistic.

...R
Two or three hours spent thinking and reading documentation solves most programming problems.

khimm19

Hehe, that's true :D But from the size you can assume it's not very power hungry. I agree, not very scientific but will do for hobby standards (and more then you want to know for industry as well...)
If that is a response to my Reply #2, I did not mean 3 or 4 hours. I meant 3 or 4 amp hours - of course if you are drawing 1 amp from the battery it amounts to the same thing. Unfortunately battery manufacturers are very optimistic.

...R
how can i charge the battery if its attach in the barrel jack of arduino?

khimm19

I have a battery (https://www.portablepower.com/product/gs-portalac-yuasa-pxl-12090/) and i want to charge it even if it is attach in arduino via power jack.

Wawa

#10
Apr 13, 2018, 06:53 am Last Edit: Apr 13, 2018, 06:53 am by Wawa
You have already mentioned this battery in your other thread.
https://forum.arduino.cc/index.php?topic=541078.0
You could have asked it there.

If you want to charge a 12volt SLA battery, then connect a 12volt SLA battery charger to it.

I always get nervous when powering an Arduino with more than 9volt (>= 13.5volt in this case).
The 5volt regulator on the Uno could overheat, depending on what else the Uno has to power.
You might want to power the Arduino with a 5volt buck converter (on the 5volt pin).
Leo..


juma_yetu

You have already mentioned this battery in your other thread.
https://forum.arduino.cc/index.php?topic=541078.0
You could have asked it there.
S/he did:

how can i charge the battery if its attach in the barrel jack of arduino?
;)


khimm19

how to connect it sir?.. first time encountering that one  :(

Wawa

Did you search for "SLA battery charger" on ebay or Amazon.
Or ask for it in a local car/motorbike shop.
Leo..

septillion

Use fricking code tags!!!!
I want x => I would like x, I need help => I would like help, Need fast => Go and pay someone to do the job...

NEW Library to make fading leds a piece of cake
https://github.com/septillion-git/FadeLed

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