Hi. When I made my Cannon trials car 'road-legal' 30-odd years ago [registered, chassis no. etc etc] I used what was cheap and available in those days...namely a Halfords electronic bicycle speedo. The head was about the size of a wrist watch...which was a bit of a nuisance, but the bits that did the reading, were a magnet [which was supposed to attach to a bicycle front wheel spoke] and a sensor, on a bracket. I attached the magnet to the top of a front brake drum, [I think I glued it there?} , with the sensor attached to a fixed point [brake back plate, IIRC?]. It worked very well indeed. I did wonder why a bicycle speedo should be able to read up to 120 mph, however....
Yes, I admire your inventiveness in fact it is very similar in concept to my arangement and a fraction of the price. I will be delighted if I ever drive ths special as everything takes so long and I am quite old.
![ТРЕШ ОБЗОР фильма УРОДИНА [теперь пластические операции бесплатные, но и обязательные]](http://i.ytimg.com/vi/jYU2d0iy3kk/mqdefault.jpg)
Hi. When I made my Cannon trials car 'road-legal' 30-odd years ago [registered, chassis no. etc etc] I used what was cheap and available in those days...namely a Halfords electronic bicycle speedo. The head was about the size of a wrist watch...which was a bit of a nuisance, but the bits that did the reading, were a magnet [which was supposed to attach to a bicycle front wheel spoke] and a sensor, on a bracket. I attached the magnet to the top of a front brake drum, [I think I glued it there?} , with the sensor attached to a fixed point [brake back plate, IIRC?]. It worked very well indeed. I did wonder why a bicycle speedo should be able to read up to 120 mph, however....
Yes, I admire your inventiveness in fact it is very similar in concept to my arangement and a fraction of the price. I will be delighted if I ever drive ths special as everything takes so long and I am quite old.