Hello everyone,
I am in trouble because of a vlotage of current problem, I think it is most a voltage problem.
Let me explain,
I have a NRF51DK that I programmed to work with a stepper motor, a nema 17 (https://www.pololu.com/product/2267)
I made the code to make it work in Bluetooth, so I am able to make it turn in one and other direction.
Everything works perfectly when I power the circuit with the usb cable plug to the nrf51dk, event if I plug 4 AAA batteries of 1.5V each
But I wanted to make it better and use a rechargeable battery, I made some research and as the stepper motor that I use only require 2.8V and 1.68A to work, I choosed this Li Ion battery (www.tinytronics.nl/.../samsung-18650-li-ion-batterij-2600mah-5.2a-icr18650-26j) that deliver 3.6V and 2600mAh with 5.2A for it's maximum delivery performance, so I was sure it was right because it deliver more power than necessary and the voltage is not too low.
But it doesn't work with this battery, I didn't changed the circuit, I tried with the 3 possibilities and only this battery doesn't work, I tried with another one because I bought 2 of them, and still the same problem, and the batteries are both full charged.
My first thought was it was a voltage problem but I Don't hink because the stepper motor require only 2.8V.
Also the same problem happens if I use a nrf51822 that only requires 3.6V (this is why I choosed this battery because the futur is to use the nrf51822 and it is easier to use the good voltage)
Also I am using this driver to control the motor : www.pololu.com/.../MP6500_r1.0.pdf
Thanks for your reply and your help!
