I dont understand at all how the circuit works so i need all the help i can get, but the circuit looks simple so i plan to build it. The schematic i am talkin about is the following one
I wanna know how to get it to drive 5, 7-segment leds as the bike easily revs past 10k.
Also how to program that IC.
--------------------------------------------------------------------------------------------------------------- Why ask questions to which you already know the answers!!!
The original forum topic is pretty descriptive...What do you need help with? And why not just ask in the original topic?
I am not sure how that PIC is programmed but most are done through the serial port with a simple circuit. Google for "home made PIC programmer" for info.
Adding another digit is easy since it looks like the PIC has another output. Just duplicate the existing "zero stage".
Also you might want to consider just buying a tach. They're fairly cheap in the aftermarket.
Ok programming part i may sort out. For getting ranges in excess of 10k would i need to do any changes in the source code???
Also aaron could u re sketch the circuit for the 10k+ range, as i dont understand the PIC part of it.
As far as buying stuff is concerned dude i am in India n we dont get this sort of stuff here atleast not yet. So plz help
--------------------------------------------------------------------------------------------------------------- Why ask questions to which you already know the answers!!!
quote: Ok programming part i may sort out. For getting ranges in excess of 10k would i need to do any changes in the source code???
I have not seen the source code, and if it's assembly then I'm basically useless at it. You will need to find the code that enables the zeros at the end and then add a clause that says something like "IF RPM > 10000 Then Enable Output" on the appropriate pin.
quote: Also aaron could u re sketch the circuit for the 10k+ range, as i dont understand the PIC part of it.
Absolutely not. I can't set aside an hour to redraw a schematic that is not on my site.
quote: As far as buying stuff is concerned dude i am in India n we dont get this sort of stuff here atleast not yet. So plz help
I simply don't believe that. There are many places to mail order thus stuff like http://www.summitracing.com . There's also eBay, and I have to believe that in teh whole of India there is at least one performance shop.
Okie dokie still thanks for the help i will try figuring out some other way to do it.
--------------------------------------------------------------------------------------------------------------- Why ask questions to which you already know the answers!!!
Tachometer
Posted - Mar 13 2006 : 01:24:33 AM
I can't set aside an hour to redraw a schematic that is not on my site.