SOHC.co.uk Forums > CB500/550
Electronic ignition
K2-K6:
;D
K2-K6:
Ash "This is a good reference in the link below from Microchip (a chip manufacturer that I use all of the time) and one of these days I am going to make an EI based on this app. note. The one bike which would really benefit from EE with electronic advance etc. is the CB72/77. Honda mounted the auto-advance in between the two cams halves on this model and it's notorious for causing problems and very expensive to fix. There is a company in Germany that makes a crank mounted EI system which gets rave reviews but I don't think you get much change from £400 for their system (more than I paid for my bike !)"
Interesting project with mapping etc. Something that has the potential to be interesting, maybe....... crank triggering we obviously look at conventional type as many are available. But.... did you know that many current or recently made cars make use of tapping off one of the ac fields from alternator windings to give rpm readout in tachometer? Obviously on a car system with belt drive that's not a defined link to crankshaft, but it is on bikes though. And so, could that possibly be used to run a full programmed system as reliable timing by running relative delay at various range to give advance retard etc.
They read out at about 7 volts ac on my car, and just goes to tachometer not ECU.
Thinking it originated in diesel as a way to run electronic tachometer but with no ignition pulse present.
Diesels have mostly moved to crankshaft trigger and monitoring for ECU functionality as they've discarded injection pump timing in favour of pure mapping and injection control.
Dave:
Ash
> ...from Microchip (a chip manufacturer that I use all of the time)
What devices / development tools do you generally use?
AshimotoK0:
--- Quote from: djb on January 28, 2022, 10:27:11 AM ---Ash
> ...from Microchip (a chip manufacturer that I use all of the time)
What devices / development tools do you generally use?
--- End quote ---
We used to programme in assembler the 'C' but recently I started using Great Cow Basic for some projects as there is a lot of support online and libraries of routines like graphics drivers etc etc.
For the past twenty years I have used a development board I designed with PIC16F877 and 5 Philips PCF I/O expanders and MAX232 on board RS232 and 'bootstrap' so customer can load code via RS232. but I tried a few of the newer chips a couple of years ago, which have loads more on chip features (like D->A , more advanced A->D and RTC and are amazingly cheap. Most of my applications are fairly simple though and relatively low speed. I still use a cheapo PicKit2 to program the devices. Great Cow have their own software for it which programmes a lot more up-to-date devices than Microchip intended/supported on it.
Interestingly I used to get my PCB's made near Saltburn ... Think it was a company called Cleveland Circuits. I now use Photronix in Sussex.
Ken ... I am merely answering a members question here .... before you terminally explode ;D ;D ;D
Johnwebley:
My head hurts!!
But isn't it good to have such expertise on the forum
Sent from my SM-A750FN using Tapatalk
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