High Current H-Bridge with MOSFET

February 10th, 2009 by Robot Technology | 1 Comment | Filed in Electronics

High Current H-Bridge with MOSFET circuit diagram>

One important feature of MOSFET transistors is that they contain an intrinsic (unavoidable, built-in) diode between their drain and source. This diode acts as a catch diode in an H-bridge configuration, and most MOSFET datasheets specify the parameters of this diode. It is thus possible to use this built-in diode of the transistors and not provide external ones if the specification of this diode meet the design requirements. For bipolar transistors there’s no such intrinsic diode so external diodes always have to be provided.

For more explanation, check up this explanation

And here the sample h-bridge schematic diagram with MOSFET:

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Microcontroller Ebook: C Programming for Microcontrollers

December 24th, 2008 by Robot Technology | 10 Comments | Filed in Microcontroller, Programming

c programmingC Programming for Microcontrollers – Featuring ATMEL’s AVR Butterfly and the free WinAVR Compiler

Introduction

C Programming and microcontrollers are two big topics, practically continental in size, and like continents, are easy to get lost in. Combining the two is a little like traipsing from Alaska to Tierra del Fuego. Chances are you’ll get totally lost and if the natives don’t eat you, your infected blisters will make you want to sit and pout. I’ve been down this road so much that I probably have my own personal rut etched in the metaphorical soil, and I can point to all the sharp rocks I’ve stepped on, all the branches that have whacked me in the face, and the bushes from which the predators leapt. If you get the image of a raggedy bum stumbling through the jungle, you’ve got me right. Consider this book a combination roadmap, guidebook, and emergency first aid kit for your journey into this fascinating, but sometimes dangerous world.

I highly recommend that you get the book, ‘The C Programming Language – second edition’ by Kernighan and Ritchie, here after referred to as K&R. Dennis Ritchie, Figure 1, wrote C, and his book is the definitive source on all things C.

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Build a Robot in 2 Hours

November 6th, 2008 by Robot Technology | 6 Comments | Filed in Electronics, Mechanics, Microcontroller, Programming, Robotics Tutorial, Sensors, Software

build robot in 2 hours
Build a robot is not difficult as you think… With no experience in electronics, you can make a robot easily in 2 hours :)

Ho it can be..?

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Making Electronics Schematics is Easy with Diptrace

September 12th, 2008 by Robot Technology | No Comments | Filed in Electronics

arx1218783179g Making Electronics Schematics is Easy with Diptrace

Making schematics and pcb layout will be easier with this program.
Autorouting is included in this program. So you can create PCB layout automatically.

Click this link to find more about Diptrace

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H-Bridge for your robot

September 11th, 2008 by Robot Technology | 6 Comments | Filed in Electronics, Robotics Tutorial

h-bridge schematics

H-Bridge is a must used for your robot to control the motors… the speed and the direction of each motor. There are many kinds of H-Bridge. For low current DC motor, you can use IC L293D or L298N to drive your motor.

H bridge is an electronic circuit that enables a voltage to be applied across a load in either direction. These circuits are often used in robotics and other applications to allow DC motors to run forwards and backwards. H bridges are available as integrated circuits, or can be built from discrete components.

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