Electrical and Electronic engineers
and looking at your board its more a case of writing the assembly code,
the speedo drive goes into a 3 wire connector im not too sure ec what each wire is.
RED- (POSSIBLY 5V?)
WHITE- (POSSIBLY GROUND)
BLACK- (POSSIBLY NEUTRAL)
either way it should give a digital output (square wave) for each rotation it sends a voltage which would register as a one, all basic stuff really.
Alternatively get a fzr (cable drive speedo pickup) fit it to your fzs then just buy a cheap analogue gauge (£30 on ebay i think) then simply just make a circuit for the rev counter ....
infact i had an idea for a new dash setup here it is sorry for babbling on about it.....
FZR cable speedo drive pickup http://i.ebayimg.com/t/90-Yamaha-FZR600-FZR-600-Speedo-drive-Cable-/00/s/MTIwMFgxNjAw/$(KGrHqNHJCUE9!M2DEVNBPT+!pWus!~~60_57.JPGUniversal speedometer clocks http://www.bajadesigns.com/images/items/Large/370002.jpg5 green leds (represents 1k -5k) http://www.earthshineelectronics.com/40-91-large/5mm-green-diffused-led-s-pack-of-10.jpg4 yellow leds [size=78%](represents 6k -10k) [/size]https://www.egr.msu.edu/eceshop/Parts_Inventory/images/5mm%20yellow%20led.jpg[size=78%]
3 red leds [/size][size=78%](represents 11k -13k) [/size][/color]
http://www.basicmicro.com/assets/images/b0058_red_led.jpg[size=78%]
some skills in DIYpatients wire ://egscontrols.com/thhn_wire_1.jpgsoldering kit (possibly?) http://www.toolstation.com/images/library/stock/webbig/57891.jpg5 blue leds (fuel gauge) http://www.sciencephoto.com/image/346754/large/T3560583-Blue_LED-SPL.jpghere goes...basically make a small op amp circuit to amplifier ---------------- THIS IS PART A wrap wire around the ht lead, possibly 4 coils and secure with tape -----------------this is part Buse part a as an input to part b------------this amplifies the signal into a usable range tap of resistor of different values (you will have to determine this) set the resistors so that when the output voltage from the amplifier turns on a led as you increase rpm therefor voltage or current something like that more leds will light up
the same principle applys for the fuel gauge using the original fuel sensor as the voltage input
then as for the speedo just replace stock fzs drive with the fzr cable drive and then screw into the analogue cable speedo
not sure what links im allowed to post but oh well..
lots of errors above very sorry, i need sleep..
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