Picture of author and project on the road.

Table of Contents

SECTION 1 Hardware Tools...

Chapter 1.

• Introduction.
• Our Goal
• The Master plan.
• Getting the Act together
• What is a microcontroller ? and Which microcontroller?.
• Which PIC language?.
• The Software Shopping List
• The Tutor
• Text Editor
• MicroChip’s MPLAB.
• The program to get our program into the PIC..
• Starter Kit
• Defining the Computer
• Sensors
• The PIC’s 18 pins
• Where to find the Starter Kit

Chapter 2.

• The PCB.
• The PCB Shopping List
• The Theoretical Circuit
• Component List
• The Electrical circuit Diagram..
• The PCB track Layout process
• I Boob… No, two boobs
• The Print process.
• Calibrating the Scale.
• Other print problems
• More Boobs… ExpressPCB was right !
• Other print process problems?.
• WARNING Chemicals WARNING..
• Waste elimination.

Chapter 3.

• Photographic Stuff
• Photographic shopping list
• The Photo frame.
• The Chemicals
• Mixing the Chemicals
• The Test strip.
• Exposing the PCB Tracks
• Here we go this is real
• Drilling the board.

CHAPTER 4.

• Inserting and Soldering the Components
• Colour code.
• The PIC programmer
• Final shopping List
• Component List

SECTION 2 Writing Code for the PIC....

CHAPTER 5.

• Introduction.
• The First attempt to define the bike computer
• Start of my original notes
• End of my original notes
• The First Steps after pseudo code.
• Making Firstest Work.
• What to do with the HEX file.
• Setting up ICPROG..
• Summing up.

CHAPTER 6.

• A simple Hex to Decimal routine.
• Debugging ” myh2dec.asm” with MPASM..
• The Watch Window.
• The F5, F6, F7 and ( control + F9 ) keys
• The StopWatch Window.
• Debug Break settings
• The Stack window.
• Summing up using MPASM..
• The Basic Windows
• The Menus we have used till now..

CHAPTER 7.

• MPLAB Number Formats
• Letter Case conventions
• More on generating code.
• The hex2dec Time problem with Big numbers

CHAPTER 8.

• The Bike Computer Flow diagram, simple version.
• The Flow-Chart
• Resolution Available.
• Back to the Flow Chart
• The Automatic menu.
• The Complete Loop Execution Time.
• Compromises

CHAPTER 9.

• Nuts and Bolts
• Math routines
• LOGIC routines
• Conversion routines
• HEX to DECIMAL.
• HEX FRACTIONS to DECIMAL FRACTIONS.
• NUMBER SCALING..
• LCD Setup, Signalling and data transfer routines
• Automatic menu (2)
• Bike3.asm..
• The END Product the HEX file.
• CONCLUSION..

SECTION 3 Putting it together....

Chapter 10

• Construction Notes.
• The Wheel rotation Sensor
• What is the Hall effect?.
• There are two main types of Hall device.
• The Bike mounted PCB.
• Bike only Theoretical diagram..
• The Box.

Chapter 11

• Appendix 1 Revised diagrams for *development System..
• PCB of Bike computer and test accessories.
• The Theoretical diag. +component layout

Comments:

• -Remove-zeedijkwhorespam at @spam@gmail.com

  Hi, I think you have a small miscalculation in the circumference of the bike wheel. Wheel circumference= Radius*2pi (for a 26" wheel circ=26*2*PI*2.54/100 = 4.14m) I believe that the 26" is the diameter and not the radius of the wheel: circ=13*2*PI*2.54/100 = 2.07m Kind regards Mike/NL

• Very nicely done. A well written and designed project :)
  
  I've just bought the bits to create one of these for my motorbike (which outputs about 64 pulses/revolution), but I was planning to use the counter pins on the PIC. This removes the risk of lost pulses (particularly on a motorbike), but also means that more time intensive functions could be performed.
  Microchip also have some nice examples of clock code, so that's possibly worth investigating too.
  
  Cheers,
  Jason+
• May be I can help you on the PCB building. I us a double sided PCB.
  Do a layout for all the parts. Us a small drill to drill for those
  parts. I made a Pad cutter by taking a 1/8 inch steel drill and made the tip look like a wood bit that would cut the copper off the
  PCB where the parts feed through. the top of the PCB is the ground
  of the circuit. I use a paint pin by SK Mechandising Corp it called Super Met-Al Marker to make my traces on the bottom of the PCB . The paint dryies real fast. It can make a .05 inch trace.
  and then I take and put wide tape on the top side of the PCB. but it into the acid and in a few minutes I have a PCB ready to use.
  
  I hope this help you. Nice code for the 16f84
  MY email is cbeener@columbus.rr.com+
• -Remove-mf_piclistspam at @spam@indirection.com

  http://home.swipnet.se/~w-51358/pilot/default.htm Nice work (big documentation effort)!! I'm looking for a way to collect a detailed record of my ride. For example: “http://home.swipnet.se/~w-51358/pilot/default.htm” -- BUT I want a simple way to collect this detail data then download to my computer using a PIC or something else. Suggestions?

Questions:

• -Remove-priceless8301spam at @spam@gmail.com.com asks: " Awesome job! How can this be converted to display miles for distance and mph for speed?" +
• -Remove-saimiri1spam at @spam@hotmail.com asks: " Sorry, it's the C language" +

  +

• -Remove-bb386spam at @spam@scn.org asks:

  Great tutorial! I would be interested in hearing from others who have home built a bike computer or have written a bike computer program for a Palm Pilot or similar.
  
  Thanks!
  
  Bruce
  bb386@scn.org

• David A Cary asks: " Nice tutorial. Who wrote this ?" James Newton replies: Fred Maher+

  +

• -Remove-kmgkhai6spam at @spam@tm.net.my asks:

  What's the max speed the computer can sense (kmh) . I planned to build a bike computer for my motorcycle . My motorcycle top speed is 220kmh . Bike computer is very hard to get and very expensive where i came from .

.