Go Down

Topic: L293D Motorshield Perhaps not supplying enough power to motors? (Read 129 times) previous topic - next topic

hakhokhar

I am building an obstacle avoiding 2WD Car, and my motor shield seems to not want to comply in the sense that it may not be powering the motors enough. However, when I give the motors a direct 5V source from the pins on the shield, it is sufficient for powering them, with a sufficient amount of speed.
The build is based on the following tutorial: Obstacle Avoiding Bot Tutorial

The motor shield I used: Motor Shield Link

The Chassis I used: 2WD Chassis

Also I am powering the Arduino and motor shield through a power bank: Power Bank Link

I am looking for some guidance on what I may be missing, or perhaps is faulty. All feedback and help is appreciated. Thanks.

slipstick

The L293D is very inefficient and is likely to be dropping 2-3V so you're probably getting no more than 3V across the motors. You really need to be powering it with at least 6V, preferably more.

steve

jremington

The L293D is ancient and weak. Use a modern motor driver, like these from Pololu.

Go Up