I have a system which consists of 2 12V DC motors(0.65 A on max load) and 1 RPi 2 model B. I want this system to be plug free. I have Li-Ion batteries to power up motors. I use a L298N module to drive motors. This module also can give a 5V output. Here is where the problem appears.
If I use this output for my RPi, RPi shows lightning symbol time to time and shuts itself down if I open things like chromium on it.
I have these options.
- I can use this cable to increase cable quality, since I am using a random cable atm. But I don't know if it will really help.
- Use a step down module to directly feed RPi from Li-Ion batteries.
- Using a powerbank to directly feed RPi.
Which options is better?
(Batteries – 5x Li-Ion 3.7-4.2 V – 2100 mAh each. I use 3x atm)
Best Answer
The L298N module doesn't say how much current it can supply at 5V, but based on the components visible on the board, I would guess that it's no more than 1A, probably less. The RPi requires up to 2A at times.
You need to get a beefier regulator (step-down module) that can handle the peak demands of the RPi.