Wireless Altoids Cycle Computer

Step 13 Resources

Cycle Computer Version 0.1
Arduino Code & Processing Code
Here's a list of things and places I found useful throughout building this project:

Adam O'Hern / CADJunkie 
Original Code

16x2 LCD & Xbee Modules:
Datasheet for HD47780
Xbee Adapter Kit
Arduino Xbee Point to Point 
Xbee AT Commands
Cool Term Serial Port Monitor for Mac (Xbee Configuration) 

Processing:
Processing Development Environment 
ControlP5 Library 

Arduino:
Arduino LCD Tutorial 
LiquidCrystal Library 
Custom Character Creator 
LCD Bar Graph Library 

Comments

[jimsims]

Alex, This is , a great project. I am modifying it to display speed, distance, and time ridden on the LCD without XBee. One question is: why use analog input to sense reed switch instead of a digital input? thanks

[Alexdlp]

Hey, pleased that you liked it! It would perhaps make more sense to use a digital input - it's just I had difficulty getting the pin to register a HIGH value for some reason. Although I couldn't actually get to see inside the sensor casing, i'm pretty sure it's just a reed switch so.. yeah try and use a digital input :)

[jimsims]

Alex and fjohn, I am using a burglar alarm type magnetic reed switch that is NO (normally open). FYI most burglar alarm switches are NC. I lashed it to the bike with "zip ties". Also, I am using arduino mini-pro so I can fit it all in the altoids tin. I am wired up with 5V to the switch, the mini pro has no 3V pin. I am guessing that there is a resistor in series inside of your reed switch. Can you measure and post the ohms value of your switch with magnet near and far away from switch? Since I am already hard wired with solder to the analog input I would like like to continue with the analog input by adding a resistor. I fried a mini pro with my switch hooked to 5V without a resistor. Thanks.

[Alexdlp]

I think a 10K ohm resistor to ground should protect your arduino sufficiently. (Pull down resistor configuration). Hope this works out okay.

[fjohn]

wen i compiled the stuff the ide showed a few errors like lcd bargraph lbg(&lcd......

[Alexdlp]

Make sure you have all of the libraries installed - it's not enough just to run the code. The error that you have is likely to be because you don't have the lcd bar graph library installed correctly. Apologies in advance if this is not the case but I have checked the code and it runs fine every time for me. :)

[fjohn]

could ya check the code again there are a lot of errors wen i compiled it!!!