Motors Specifications

[ron2n2222]

Looking for the Motor Specifications, Like voltage range, max current. I what to find a rechargeable battery that work on the motors and work on the STEM. I would use a boost or buck circuit to match the STEM Board.

[jasea]

Hi ron2n2222,
Welcome to the forum. You will find the description of the gearboxes at www.pololu.com/product/114 The motors are rated at 3 - 6 volt, so a single cell Li-ion 18650 at a reasonable capacity could be used for the motor driver.The STEM Board is supposed to be Arduino compatible and so should run on at 6 - 20 volts but the preferred range for a UNO is 7 - 12 V. On another project I used the Tamiya gearbox with the higher voltage motor described on the Pololu page that run at 6 -12V. To power this project I used three 18650 5000 mAh rated cells for the Motors and two Cells at the same rating for the Arduino Nano that I used to control the project. I preferred to use two battery packs rather than a single pack and a voltage regulator, to help to reduce electricial noise from the motors effecting the supply to the Nano board. I hope that this helps you.

John

[ron2n2222]

John
Thanks for the input on the motors, I am new to Robots and Pi-Bot, where is the best place to buy the 18650 5000 mAH batteries and a good charger?
Ron2n2222

[jasea]

Hi again,
You don't say where live, I live in the centre of France and have to do most of my "Techie Shopping" over the internet. I use the Chinese shops a lot but there is a delay in receiving the goods, but then the postage is low or free. You may find your local electronics shop is a better source of equipment.
As usual when I looked for the items that I bought they were no longer there, but I did find the following items on Banggood.com
www.banggood.com/18650-3_7V-Li-ion-Rechargeable-Battery-For-Flashlight-Torch-Yellow-p-921905.html
www.banggood.com/Wholesale-New-3_7V-Battery-Charger-For-UltraFire-18650-14500-17500-p-25187.html
Don't forget you will also need two cell battery cases that are suitable for the 18650 battery, but these are readily available on Ebay and Amazon as of course are the batteries and chargers.
I will add that I have no connection, except as a customer, with any of the above companies.

John

[ron2n2222]

John

Thanks again. Well I am only 5,138 miles from you; I live in North West comer of the United State. I also buy most of my parts from the China. I will look into banggood.com

Thanks

Ron