Motor signal amplifier

Introduction

This is a simple home built curcuit that amplifies the power available to drive larger motors than the standard Lego motors. The singal source can be a simple Lego switchbox (as seen in the picture) or an RCX controller. The control circuit is opto-isollated from the motor drive circuit to keep the control circuit safe from the higher voltage drive cicuit.

This project is made from:

• Press-n-Peel Press from Techniks, Inc.
• Press-n-Peel Blue PCB Transfer Film from Techniks, Inc.
• Blank PCB(Jameco)
• One PC Board Kit Catalog #: 276-1576 (RadioShack)
• Two Vishay Infrared Optocouplers(Mouser)
• Four ST Power MOSFET Transistors(Mouser)
• Three 1k Ohm resistor, ¼ watt (RadioShack)
• Four 10k Ohm resistor, ¼ watt (RadioShack)
• Three Terminal blocks(Jameco)
• One Jumper Wire Kit Catalog #: 276-173 (RadioShack)
• Two Modular IC Breadboard Socket Catalog #: 276-175 (RadioShack)
• Two Heavy-Duty 9V Snap Connectors Catalog #: 270-324 (RadioShack)
• 9-Volt Lego Connecting Leads
• Lego Battery Box With Switch

The Plan

Status of the Project

What's Next

Modified 2003-06-30
Copyright © 2003 Edward Evers