Am I safe using individual batteries in a series connection?

[Jarfi]

I am building a system which uses multiple components, each has varying voltage. The large motors use a voltage of 14-16 Volts, thus there are several batteries wired in series, providing this voltage.

Now, there are other components such as microcontrollers, multiple sensors and smaller servos which use a lower voltage of 7 Volts. Say I have two batteries, could I use each one individually, while also having them connected in series configuration?

I am aware they may be discharged unequally. But other than that I don't see a problem. This picture is a concept.

Thanks,
-Jarfi.

 

[gleem]

Sure it will work but you observation about unequal discharge is correct and will be a problem regarding monitoring of battery condition.

 

[meBigGuy]

Yes it will work within the limits you pointed out. The more optimal solution is a buck converter to efficiently produce a lower voltage from the higher voltage. Also, circuit 1, 2 and the motor do not share a common ground, which can be problematic.

 

[Jarfi]

Yes it will work within the limits you pointed out. The more optimal solution is a buck converter to efficiently produce a lower voltage from the higher voltage. Also, circuit 1, 2 and the motor do not share a common ground, which can be problematic.

buck-converters seem like a pretty good option, I'll take a look at them. Thanks