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Velosats
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Re: Velosats

by adafruit_support_bill on Wed Mar 25, 2020 3:11 pm

I am connecting 1 servo motor,1 lcd, and like 50 sensors to it, so I think I need a good amount of voltage.

For all that, you need current, not voltage. And 9v batteries are pretty bad at supplying current.

Servo motors run best on about 6v and even the small ones can draw 1A or so when moving, so the 4xAA pack would be a good choice.

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Re: Velosats

by animefruit on Wed Mar 25, 2020 3:18 pm

But I already have a 4 AA pack and when I used like two servos it did a wired beeping sound when ever the servos were supposed to move.But than I tried it with on servo, and the servo moved, but it couldn’t go one direction and than the other direction, or as some people call it, sweeping.And I want it to sweep.So I was thinking that if I just give it a little bit more power than it would.But what do you think about this problem?

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Re: Velosats

by adafruit_support_bill on Wed Mar 25, 2020 3:29 pm

I was thinking that if I just give it a little bit more power than it would.

Power is volts times amps. More volts does not necessarily mean more power if the battery can not supply amps also.

4xAA should be plenty of power for 2 servos. Your problem might be interference from the servo motors causing the processor to malfunction. You can try adding a large capacitor between 5v and GND. Or you can try powering the servos from a separate battery pack.

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Re: Velosats

by animefruit on Wed Mar 25, 2020 3:43 pm

So do you mean a capacitor goes between 5v and ground on the bread board?I have connected 5v and ground to my bread board.

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Re: Velosats

by adafruit_support_bill on Wed Mar 25, 2020 3:54 pm

Yes, on the breadboard should be OK. If that doesn't work, post some photos showing your setup and we'll see if we can spot any problems.

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Re: Velosats

by animefruit on Wed Mar 25, 2020 4:07 pm

Ok.I will try that.Thankyou.

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Re: Velosats

by animefruit on Thu Mar 26, 2020 11:29 am

So I heard the feather only supports 3.3 volts.Is there something like it that can charge up that supports more volts?

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Re: Velosats

by animefruit on Thu Mar 26, 2020 11:41 am

I also don't know the amount of uf that you recommend for my capacitor.How much?There are some that are 100 uf, 220 uf , ect.

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Re: Velosats

by adafruit_support_bill on Thu Mar 26, 2020 12:33 pm

The exact value is not critical. And some servos are noisier than others. About 220uF per servo is a good starting point.

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Re: Velosats

by animefruit on Thu Mar 26, 2020 6:35 pm

Ok,got it.So can I connect other higher voltage batteries to the Feather we are talking about?Such as the 9v battery holder?

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Re: Velosats

by adafruit_support_bill on Thu Mar 26, 2020 7:19 pm

No. The Feather is designed for power supplies between 3.3v and 5v only,

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Re: Velosats

by animefruit on Thu Mar 26, 2020 8:25 pm

Ok. Thankyou for that information.But isn’t that the same that the Arduino Uno does?Can’t the Arduino hold 5 volts even if you connect something that is 9 volts?

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Re: Velosats

by adafruit_support_bill on Thu Mar 26, 2020 9:07 pm

No. It is not the same as an UNO. First, the UNO is a 5v processor vs. 3.3v for the Feathers. And the UNO has a much larger voltage regulator that can dissipate more heat. And that is exactly what it needs to do with the excess voltage. It just gets burned off as heat.

The Feathers were designed to run from either a LiPo or USB. They can handle anything from 3.3v to 5v.

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Re: Velosats

by animefruit on Thu Mar 26, 2020 9:14 pm

So isn't the Adafruit Metro Mini 328-5V 16MHz and the Arduino Nano the same as the Arduino Uno as far as voltage goes?Is there type of circuit board that can support as much as 12 volts like he Arduino Uno and is solderable?

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Re: Velosats

by adafruit_support_bill on Fri Mar 27, 2020 6:01 am

The Metro Mini 5v can handle the same input voltage range as an UNO and is solderable. But why do you want to power it with 9v or 12v? You are just making the regulator work harder to burn off the excess voltage.

More volts does not mean more power. It means more heat. And more heat means less usable current. So in effect more volts means less usable power.

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Please be positive and constructive with your questions and comments.