I found the following links in my favorites after completion of the Unimog hardware. All these pages have been helpful in some way.

Projects

• SuperREGIS Roving Robotic WebCam a autonomous webcontrolled vehicle - bigger than Unimog :-)
• Robotics Links for technophiles
• very small robot samples

Robot resources / circuits

• Bowden's Hobby Circuits a collection of circuits for the hobbyist
• ePanorama.net - All about electronics various electronics circuits and documents
• Interfacing to the IBM-PC Parallel Printer Port
• Jim Fuller's Web Resource Site
• PC Generated Pulse Width Modulation (PWM) DC motor Speed Control
• Pitronics - Over Robots
• Dan Creagan's Robots
• Rover Project uses the same sensors (GP2D12 and Polaroid 6500)
• Tech Geek - Building a robotics community
• Seattle Robotic Group newsletter The Encoder

Parts

• IC-ID Integrated Circuit Identification find out what parts you have
• PWM motor controller for DC motors and fans
• Polaroid 6500 Sonar Module pdf
• Polaroid Sonar Module manual pdf
• Motor Drive Electronics
• Color Resistor Code
• the CNY70 is the part I used for the tacho to count how far Unimog drove CNY70.PDF pdf

PIC Links

• PIC 16F877 Datasheet pdf
• JAL list everything you want to know about JAL
• PIC16F84 and PIC16F877 application very good documentation how to connect in and output to the PIC 16F877 - thank you very much, vasile
• JAL resources
• PIC - Ubicom Dev'rs - What's New
• PIC Theory