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Note: Effective immediately, the products on this website have been rolled into the VEX product line (see VEXpro) and will only be available for sale at vexrobotics.com. Please click over to the VEX site to make your purchases. The relevant reference material on this site will be migrated over to the VEX Wiki over the next few weeks.

IFI Robotics - White Papers

C Programming
Using Polled or Interrupt-driven Timers (2004-Jan-14)
The purpose of this document is to show two examples of how to use the timer modules of the Microchip PIC18F8520 microcontroller.  This information is applicable to both the 2004 Mini Robot Controller and the 2004 FRC Robot Controller.  This document will also provide hints and a useful example of how to use the low-priority interrupts which are available to the user.
More Than Two Joysticks using a Y-cable (13K)
Maximize Your Analog Channels! You can legally build a Y-Cable with kit parts that will allow up to four joysticks. Also included is a source for ordering more joysticks.
More coming soon . . .

Educational Robot
Radio Control Selection Guide (37K)
Selecting a Radio-Control System for the 2004 Mini Robot Controller.
More coming soon . . .

FIRST Team Tips
Quick Start Guide (18K)
This document is a guide to aid FIRST teams in their design and prototyping process. Think of it as an extension of your kit. You don�t want to find yourself waiting to order parts tomorrow when you have a problem to solve tonight!
Example Schedule (5K)    Also in .XLS format (81K)
Looking for a place to start. Here is a typical schedule. We developed and improved this over 6 years of competing in FIRST.

FIRST Robot Technical Info
8.2 Volt Memory Issue - Temporary Resolution (37K)
Data appears to be shifted. The displayed battery voltage is actually the Port4_Aux value. If
nothing is connected (on this port) the voltage gets converted to 8.2-8.3 volts.
Improving Drive Train Efficiency (15K)
Here is a method to follow to determine the efficiency of a drive train and some tips on how to improve it.
Speed Controller Comparison Charts (26K)
Motors can draw large amounts of current with over 300A surges. This chart compares the Victor 883 to a typical RC speed controller designed for toy cars. Data includes temperature, thermal shock, and surge current supplied to the motor.

Information from FIRST Teams

FIRST Handbook (204K)
Here is a document by veteran David Asano from Bell Atlantic. In it, he covers everything form brainstorming to travel arrangements.
 

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