Content in “L293D”

problems with L293D + Arduino

lordofthedonuts — Sun, 28 Sep 2008 04:07:31 -0400

I wired up a L293D to my arduino, planning to run 2 motors with it, and just for testing I runned the blinkie program on it changing the LEDpin to the to the digital pin that goes to the l293d but only half of the pin works, like it turns in only one direction. Is it normal ?

It's 4 in the morning so I did not do a lot of trouble shooting, just changed the pins that were on PWM to digital, it didn't changed anything.

L293D - Motor Driver Walkthrough

guibot — Thu, 11 Sep 2008 10:56:00 -0400

In this walkthrough I will show one simple way to use L293D H-Bridge, and build a basic Motor Driver for Arduino. I only tried this with Arduino Diecimila and it works well.

There may be other ways to do this, but since this works for me and feeds my needs, I assume this might be useful for more people.

NOTES:

The Picaxe Support Chips - What are they for?

psy — Mon, 19 May 2008 12:38:19 -0400

There are various different chips which are commonly used with the Picaxe chip. Here I attempt to explain what each one does, where it goes and why you might care.

Most of this has already been mentioned, but I thought I would collect the information together here and add a little more detail where I can. I apologise in advance for the wikipedia scholarship that follows, so please let me know what I got wrong and I'll try and update this page to match.

L293D Motor driver

fritsl — Fri, 15 Feb 2008 10:37:38 -0500

This chip enables you to take 4 outputs and turn them into 2 that can be reversed.

Note that the chip can get quite warm, but it is designed for that.

Benefits:

You can control 2 motors in both directions instead of 4 in only one direction.

Disadvantages:

There is a 1.5V voltage drop within the L293D driver chip.

If you run both motors and servos on the same circuit, your servos will allways get 1.5V more than the motors - and typically you would want it the other way around!