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This instructable is the written version of my "Arduino - Obstacle Avoiding Robot (with L293D)" YouTube video that I've uploaded recently. I strongly recommend you to check it out.

My YouTube Channel

Step 1: Tutorial

In this video is explained step by step.

Dual H-Bridge Motor Driver for DC or Steppers - 600mA - L293D

This is a very useful chip. It can actually control one motor independently. We will use in its entirety the chip in this tutorial. Pins on the right hand side of the chip are for controlling a one motor. Pins on the left hand side of the chip are for controlling second motor.

You can run four solenoids, two DC motors or one bi-polar or uni-polar stepper with up to 600mA per channel using the L293D.

Step 2: Hardware Required

  • Arduino Uno R3
  • Dual H-Bridge L293D Motor Driver
  • HC-SR04 Ultrasonic Module Distance Sensor
  • Bracket / Holder for HC-SR04
  • DC Motors and Wheels
  • Bovine Wheel
  • Plate or Chassis
  • Jumper or Wires
  • Batteries and Battery Holdes
  • Glue Gun or Cable Ties
  • Breadboard

Step 3: Create a Chassis

In this step; We are doing chassis installation.

You can use any plate for the chassis. But do not use a metal!

  1. Let's first mount the wheels.
  2. Then let's mount the battery holder.
  3. Finally mount Arduino and breadbord.

Step 4: Create Power Distribution

I am using a breadboard for distribution to VCC and GND. For to be adjacent to the motor driver.

Step 5: All VCC and GND Connections

All VCC-GND connect with wires to the L293D motor drive and the batteries.

Each chip contains two full H-bridges (four half H-bridges). That means you can drive four solenoids, two DC motors bi-directionally, or one stepper motor. Just make sure they're good for under 600 mA since that's the limit of this chip.

Normally we can connect both of these to the Arduino 5V pin. We used a powerful motor, or a higher voltage motor. So we provided the motor with a separate power supply using pin 8 connected to the positive power supply and the ground of the second power supply is connected to the ground of the Arduino.

Step 6: DC Motor Connections

You can run four solenoids, two DC motors or one bi-polar or uni-polar stepper with up to 600mA per channel using the L293D.

You can use OUT1 and OUT2 for the left motor.
OUT4 and OUT3 can use for the right motor

Step 7: Digital Input Connections

The L293D has two +V pins (8 and 16). The pin '+Vmotor (8) provides the power for the motors, and +V (16) for the chip's logic.

Digital 2 to OUT1

Digital 3 to OUT2

Digital 4 to OUT4

Digital 5 to OUT3

Step 8: HC-SR04 Connections

Sensor VCC to Breadboard VCC

Sensor GND to Breadboard GND

Sensor Trig to Arduino Digital12

Sensor Echo to Arduino Digital11

Step 9: Finally; Battery, Wheels and Sensor Mounting

We're making the final touches ...

Then connect the robot to the computer for programming.

Step 11: If I Was Helpful

First of all, I would like to thank you for reading this guide ! I hope it helps you.

If you want to support me, you can subscribe my channel and watch my videos.

Visit My YouTube Channel

<p>can we connect 9v battery as power supplu please help in that</p>
<p>I also have the same question as mounting a 9v battery would be much easier, but in this instructable, 4 AA batteries are used which gives 1.5x4=6v only. So if you connect a 9v battery won't it overpower the circuit? I am equally not sure, someone please help. Can a 9v battery be used instead of 4 AA batteries?</p>
<p>Ger&ccedil;ekten &ccedil;ok başarılı bir &ccedil;alışma olmuş emeğine sağlık mertcan kardeş. <br>yalnız &ouml;ndeki tekerlek nasıl bir tekerlek anlayamadım. hazır mı satılıyor <br>Proje on numara proje keşke 10 sene &ouml;nce meslek lisesinde bu dersleri verselerdi. </p>
<p>Yorumların ve desteğin i&ccedil;in teşekk&uuml;r ederim. &Ouml;n tarafta kullanmış olduğum tekerlek 'sarhoş tekerlek' olarak satılmakta. &Ccedil;ok &ccedil;eşidi var. İnternet &uuml;zerinden &ccedil;eşitleri inceleyebilirsin. </p>
<p>what...</p>
<p>Somewhy i cant not drive my own robot. It looks like it is missing amps or something? motors aint spinning while on batteries. Robot is working fine while connected to USB/ PC. I am using <a href="http://www.electrodragon.com/product/arduino-official-motor-drive-shield-l293d/" rel="nofollow">L293D</a> motor shield. </p><p>What can be the problem? Thanks</p>
<p>I will try to help;</p><p>- If the motors are moving with USB, please check your external power connections for L293D.</p><p>- It may be a simple suggestion, but it has happened before, so renew your external battery. (That means the battery you are using does not have enough power.)</p><p>- I need to see your robot in order to produce a solution. If possible, upload the images of the robot here.</p>
<p>Eğer bir keskin yakınlık sens&ouml;r&uuml; ve nasıl kullanabilirim?</p>
<p>Hi vincent44,</p><p>Where are u from? Because I don't understand sorry :/ What did you mean &quot;keskin yakınlık sens&ouml;r&uuml;&quot;? </p>
<p>bir sorumda bu t&uuml;r paylaşımlar yapınca &uuml;cretsiz premium filan var mı merak ettim </p>
<p>Mesaj g&ouml;nderirken fark ettim, sanırım senin premium aboneliğin mevcut :)</p>
<p>evet aralıkta bitecek.</p>
<p>Paylaşımlardan ziyade paylaştığın projeler eğer &ouml;zellikli ise, yani onların deyimiyle 'featured' ise premium &uuml;yelik hakkı tanıyorlar. Ben sana &ouml;zelden bir premium hediyesi g&ouml;ndereceğim. O kodu kullanırsan bazı site &ouml;zelliklerinden de yararlanabilirsin. Eğitim ve kurslar v.b.</p>

About This Instructable

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Bio: I've just started a youtube channel, hoping to help people, share some of my knowledge and learn myself. My next Youtube (and Instructables) tutorials ... More »
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