Servo Motor Probem for making both Move Opposite ways

[adafruit_support_bill]

I don't think you want to solder the pack directly, because you will need to remove it to charge it.

You could use a set like this: https://www.amazon.com/Qsmily-Rechargea ... B08M3PX5SZ
It comes with a battery pack, a charger and an extra connector. If you wire the extra connector to your Nano, you can plug your battery into the Nano to run, or into the charger to re-charge.

LiPi cells are 3.7v, so the LiPo pack voltages are in multiples of 3.7v. A 2-cell pack would be 7.4v which would work for the Nano. Don't forget you will need to get a 7.4v charger to go with it.

[animefruit]

So can I solder the LiPo batteries to my Arduino Nano?

Because in the images in this article it looks like they solder them directly to it.

But they also connect these other devices to it which are the TP4056 and the Pololu U3V12F5 I guess to regulate the voltage when the battery charges or something like that.


If I did choose to solder LiPo batteries to my Arduino Nano, would I need to connect those other devices as well?

Here is the link for the article:

https://bikepixels.com/2019/11/10/how-t ... -projects/

[adafruit_support_bill]

In that project, they can solder direct because they have a charger in the circuit also. They also have a boost converter to generate 5v from the 3.7v LiPo.

The problem with that is that the current will be limited by the boost converter. And since you need to drive 2 servos you will need to use a boost converter that can supply enough current for your servos.

[animefruit]

Ok. I think it will be easier to use the set from the link you gave me that is the set that just lets you recharge it through usb and plug into the Nano.

This is the link you were talking about:

https://www.amazon.com/Qsmily-Rech ... PX5SZ

Does it matter how much mAh it is?

There are two options for the specific battery you sent me, which is 1000 mAh or 2000 mAh.

For the specific battery in the link you sent me; the battery that is 1000 mAh would get here in like 2 days or so but the 2000 mAh battery would take 1 month or 2 to get here.

But I could always get a different brand or something if I do need to get 2000 mAh.

So which amount of mAh should I get?

[adafruit_support_bill]

Does it matter how much mAh it is?

A battery with a higher mAh rating will give you a longer run-time between charges. 2000mAh should give you about twice the run-time compared to 1000mAh.

2000mAh should give you about the same run-time as your current battery pack with AA alkaline cells.

[animefruit]

Ok.

So it has been a while.

But I tested out the Battery I just got and it can’t plug into my Arduino Nano.

So can you tell me all I need to connect a LiPo Battery to my Arduino Nano in order for it to be rechargeable?

[animefruit]

Nevermind.

I got this anyways:

https://www.adafruit.com/product/1 ... Lw_wcB

I think this will definitely do.

But you can still tell me if this isn’t what you think I should get.

[adafruit_support_bill]

That should work if you have a 3.3v Nano.

[animefruit]

I am using the original Arduino Nano from here:


https://www.amazon.com/Arduino-A000005- ... st_sto_dp#

https://store.arduino.cc/products/arduino-nano

Well actually it says the operating voltage is 5v so do you still think it will work?

[adafruit_support_bill]

Probably not. We do not make those processors, so I do not know. But typically, the 5v Arduinos require a 5v USB supply or at least 5v to the VIN pin. A 3.3v Nano should work OK with 3.7v to the VIN pin.

[animefruit]

I connected my Adafruit Micro LiPo Charger.

I connected them like how it is in this link:

https://www.reddit.com/r/adafruit/c ... rduino/

I connected the 5V of the Charger to Vin on my Arduino.

And I connected the the GND of the Charger to the GND on my Arduino.

And I plugged in the 3.7v LiPo Battery.

My Adafruit Micro LiPo Charger works when plugged into the USB of my computer.

But it doesn’t work by itself with the LiPo Battery connected.

What do you think is wrong with it?

Should I connect a rechargeable battery to my Arduino in a different way?

And I would like to not have to completely change my Nano to a 3.3V Nano.

[adafruit_support_bill]

I connected them like how it is in this link:

https://www.reddit.com/r/adafruit/c ... rduino/

That diagram is not correct.

The '5v' pin of the charger only has 5v when plugged into USB. It is a charger board. Not a voltage booster.

[animefruit]

Thanks for the info that it is incorrectly connected.

How am I supposed to connect it to my Arduino?

[adafruit_support_bill]

As I explained in my earlier post. It will not work for a 5v processor since the battery is only 3.7v You need a boost converter for that.

If you want to power your project with 3.7v, you need to use a 3.3v processor. There are many 3.3v processors to choose from.

[animefruit]

Ok.

I do not want to change my processor though.

And I don’t want to connect a boost converter because I do not know how that works.

I really think using normal 4 double A battery pack was perfectly fine.

But the batteries weren’t very Secure in the pack and I sometimes even had to press on them to get them to work.

I also don’t want a Battey Pack that will jostle around the batteries because it is supposed to be made for something that will be attached to a vest for people, so it will be moving around quite a bit.

So instead of rechargeable batteries, do you know of anything that would Securely Fit my batteries for my Arduino for my project?

The Battery Pack I used is here:

https://www.amazon.com/gp/aw/d/B00H ... in_title