Thank you for the link, Guerney. I'll take a long look at the code to see whether I can adapt it for my requirement. As it happens it wasn't the post I had previously seen which I found again (and it wasn't in the pedelecs forum???
How to add a throttle to a Carrera Vengeance E Spec
UPDATED v1.1 code (30/05/2018) Improved the pulse conversion from the throttle Improved the pulse replication from the pedal So, with the kind help from Tony at Wooshbikes.co.uk I've been able to complete this little project. :) He supplied a thumb throttle and a replacement DH Sensor which is...www.pedelecs.co.uk
Thank you. Yes that is a really interesting website (eg the solar powered ebike!). I got the impression that his PAS solution was quite complex - programming the atmel controller chip (viz the Arduino db) looked simpler - I'm waiting for a disc and sensor from China to provide the pulses.It's already been done here: