I have a question about using the external power connector to power the nano motor carrier. The data sheet seems to indicate that this voltage should not exceed 4.0 volts. I want to be able to power the board without using the battery that comes with the Engineering Kit.
If I connect the external power terminal block (green 2 pin terminal block) to a Lab Supply and set the voltage to 4.0 volts will I have an issue. My concern is that the Carrier board also has a charging circuit that is intended to turn on when a battery is connected. Will the external power supply cause any issues related to the charging circuit. Has anyone tried what I am attempting to do. Thank You....One last item do you think If I used a 5 volt supply would be a problem.
....which says that VBAT <6V won't hurt the battery charger chip.
5V is out of the Arduino spec so you shouldn't do it, but if you want to believe just some guy on the internet who only looked at the datasheet for a minute and didn't try it, it might be OK. I think if VBAT is above 4.2V or so, the charger shuts off.
Dave thank you very much for the quick response and data sheets. So it looks like as long as the External supply power that I am going to use is above 3.8V (voltage at SYS) and Less than 4.0. I will keep the Charger off and wont exceed the Arduino max voltage. I will set the external supply to 3.9 and give it a shot...Thank you very much
I just was reading through the Charger Chip data sheet. There is a command register than can be used to turn off charging. (too bad there wasnt a jumper setting for CE). I wonder if the Arduino Motr carrrier library supports that function. I believe there must be a command since I know that when you use the MATLAB interface there is a command to begin charging...I will take a look...Thanks Again..
