On 24 Nov 98, 14:24 Scott Dattalo wrote: > On Tue, 24 Nov 1998, Wolfgang Strobl wrote: > > > On 23 Nov 98, 23:25 James Cameron wrote: > > > > > The module would count the speed sensor pulses and deliver them with a > > > timestamp as an ASCII line on the serial output that looks like this; > > > > > > > > a,0000000001,0000000001\r\n > > > > Funny. I just finished and testet a similar device last weekend, and reporte d the > > results to the "bikecurrent" mailing list (for a slightly modified html vers ion, see > > http://ntklotz.gmd.de/pic/tacho/bikecurrent.htm). > > Neat! One idea I had for a speedometer, but (like most of my other ideas) > never implemented was to count the spokes and use the valve stem as the > single-revolution reference. Most valve stems and spokes are metal > (steel), so it should be possible to inductively measure them. Well, when looking at the bits of data I've collected so far with my device, I notice that there is so little random variation between one cycle and the next, that I believe the measurement to be already more exact than necessary with one pulse per revolution. So what's the advantage of your design? No necessity for a magnet in the spokes? Greater distance between wheel and sensor, at least in theory? And what kind of sensor are you going to use? I'm curious. -- o ( Wolfgang.Strobl@gmd.de (+49 2241) 14-2394 /\ * GMD mbH #include _`\ `_<=== Schloss Birlinghoven, __(_)/_(_)___.-._ 53754 Sankt Augustin, Germany ________________