Robot Builder Articles

The PIC 16F62X series is a pin-compatible upgrade to the old F84. There are no analogue to digital converters (ADC) as such but it is a simple job to use a comparator, a timer and a few lines of software to make one.

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Electronics

Quick Start Guide to Microcontrollers

Quick Start Guide to Microcontrollers, how to choose and where to go.

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programming

Compass Sensor Error Correction

Geomagnetic compass sensors provide an absolute direction reference which is essential for reducing dead reckoning errors in robot navigation, however errors due to external magnetic fields often limit their uses. A method of identifying and reducing these errors is described.

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Electronics

Robot Sonar

A brief introduction to the use of ultrasonics in measuring distances to objects. A circuit for a 4-channel sonar system is described.

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Competition

Morris-y-Gwynt ~ beneath the polycarbonate

Pictures of Morris-y-Gwynt and a few notes which I hope may be helpful for other RobotBuilders working towards either Rex’s Robot Challenge 2003 or other feather weight competitions.

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Electrical flexible conduit and fittings for robot wiring

electrical liquid tight flexible metallic conduit,LT fittings

DC-DC Converter using a PIC16C620A

A buck-mode converter for a stable output
voltage and/or current from an unstable
or variable input. Preliminary.

DC Motor Speed Control

A brief introduction to using a H-Bidge IC and a PIC microcontroller to control the speed of a DC motor.