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:

• spamzeedijkwhore at spamgmail.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+
• spammf_piclist at spamindirection.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:

• spamnelsonmakeketa at spamyahoo.com asks:

  Great tutorial!
  
  I tried following the steps and i got the hardware rite but programing the pic i am strugglling i don't seem to understand the program can anyone plz send me a complete ASM file 4 the computer

  James Newton of James Newton's Massmind replies: The asm file is listed at http://www.piclist.com/techref/piclist/biketut/chapter9.html#zzee_link_10_1019487535 +

  +

• spambb386 at spamscn.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+

  +

• spamkmgkhai6 at spamtm.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 .

See:

Peter Todd has released source and sample projects for his artwork, including his 3d wireframe cube renderer for the PIC 18f6520 This includes examples of hardware developed with free software tools such as gEDA/gschem/PCB, SDCC, gputils and picp all on Linux. http://petertodd.ca/art/source-code/

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