Arduino Forum

Products => The Arduino Starter Kit and Basic Kit => Topic started by: ReadySetGo on Dec 03, 2015, 02:12 pm

Title: Project 10 - What is the benefit of using an H-Bridge?
Post by: ReadySetGo on Dec 03, 2015, 02:12 pm
Hi!

First off, thank you for your help!  I'm new to Arduino and working my way through the Starter Kit.  My goal is to eventually make a solar powered robot.

Project 10 utilizes the L293D H-Bridge to send signals to the DC motor.  However, it takes up 3 GPIO pins on the arduino.  Conversely, project 9 doesn't use an HBridge and requires only one GPIO pin.  Even if I were to drive two motors on my robot without an H-Bridge, I would have one pin available for other cool stuff (blinky LED's - mandatory in every cool robot).

My question is: What is the benefit of using an H-Bridge?

As a follow up question: I've noticed some people using continuous servos to maneuver their robots.  Under what circumstances would I use a continuous servo instead of a motor?

Thanks!
Title: Re: Project 10 - What is the benefit of using an H-Bridge?
Post by: Gorduino283 on Sep 09, 2016, 07:54 pm
In the description in the beginning of the chapter, it says H bridges can switch polarity.  You need this for this project since you make the motor switch spinning directions.
Title: Re: Project 10 - What is the benefit of using an H-Bridge?
Post by: rogertee on Nov 19, 2016, 05:21 am
arduino uno has at least 11 digital pins if you run out of pins you need to graduate to the Arduino Mega 2560