This is a very brief video showing you how to set up your own inexpensive cadence meter. I do not show you every single step. You will have to fill in some of the blanks yourself. Most bicyclist don't use speedometers or cadence meters, but I have found them useful. Experienced bicyclist spin at 70 to 90 rpm. competive racers peddle at 80 to 120 rpm. Roller racers can spin over 200 rpm. I have heard the record is 300 rpm. I usually average 78 rpm during my hour commute. I am most confortable peddling around 85 rpm. For a better workout I will try to keep it over 95. My top rpm so far has been 133 rpm. Because, I use 2 speedometers (one on the wheel and one on the crank) I can get some other useful information. I know that I peddle 92% on the time. And, my average gear ratio is 1.89. So, for each rotation of the peddle I am traveling 13.7 feet. If you want to use the k/hr mode use 1667 to configure the speedometer. I figured this all this out using a Excell spreadsheet. It was only later that I understood why it works. 88 X 60 = 5280. So, the rpm = mph. Don't believe me. Do the math yourself. It is an interesting exercise Having two speedometers on the handle bars can be distracting. So, If you are watching numbers instead of traffic get rid of them or move them where you can't see them. Usually I am most interested in my average speed. Since speed is a combination of cadence and gear, I have found it most useful. I know if my average speed drops below 11 mph than it is going to take me more than an hour to get home. I know what you are thinking. But, I am old and fat. My bike with all the lights and extra clothes for early morning cold weighs 45 pounds. Even if I had a $10,000 carbon fiber bike I am not going to average 20 mph. Plus, my experience is that speed in an urban area with lots of traffic is not an advantage. You get into trouble quicker and have less time to react.... Dec 23 2009nbsp018332This is a very brief video showing you how 3 Simple Ways to Share What You Make With Instructables you can share what you make with the world — and tap into an May 06 2011nbsp018332im try to my 14 LCD Electronic Bicycle ComputerSpeedometer Digital speedometer schematic available here PDF 34KB C source code available here under GPL ZIP Cadence is the speed at which the pedals turn Youve decided to take your bicycling seriously Chances are youve been riding your bike between 10 and 15 miles per hour at about 60 revolutions per minute also Welcome Curious about Human Power Need some exercise Trying to lose weight Need Our Lights test 2012 ranks the best 28 front and 22 rear bike The most comprehensive Honda Goldwing technical forum in the world Free membership maintenance help tutorials and much more for Goldwingers