Tore down some optispark sensors today
07-31-2015, 09:27 PM
#42
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Does it look like this one
08-01-2015, 09:16 AM
#43
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Yeah, you've still got something weird there. The signal goes from 0 to 5 volts. anything at 5 to 10 millivolts is probably just noise. Try zooming the scope out to something like 2 volts per division. If everything is working you should be able to put your scope on the 5v from your power supply and see just a straight line at two and a half divisions.
Another thing to be aware of is that the sensor doesn't generate the square wave when the optispark isn't spinning. If you are holding still it should just show 5v or ground depending on whether or not it's in one of those slots.
Another thing to be aware of is that the sensor doesn't generate the square wave when the optispark isn't spinning. If you are holding still it should just show 5v or ground depending on whether or not it's in one of those slots.
08-01-2015, 09:24 AM
#44
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Actually now that I think about it, I don't know if we ever tested the optispark off of the car. If the computer has pullup resistors holding those lines up at 5v and the sensor just pulls them low that would be another reason you are just seeing the noise change a little. You could try plugging it into your car's harness with the ignition on and then looking at the signals with the scope.
08-01-2015, 09:35 AM
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Yeah, I'll bet that's it, needs to be plugged in to the car work. I'll have to see if I have a functioning optispark laying around that I can test.
08-01-2015, 09:42 AM
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I would guess something like a 10k resistor but I'm really not sure what would be needed. There's also a chance that could hurt the sensor if it's wrong so you'd be safer plugging it in.
12-19-2016, 01:31 AM
#50
Ok, thread resurrection...
https://www.amazon.com/Ignition-1992.../dp/B00FSC65P4
http://www.aipelectronics.com/index....nitac-lt1.html
And various other locations on the inter-wide-web...
1) Has anyone tried these AIP sensors more recently? Any luck? Longevity?
2) For those who already fixed their old sensors, are the opti's still going strong?
I literally have a milk crate full of dead opti's and this would be a really good way to save some cash but I just want to do my reserach before buying. If its a gamble I'll probably get it, but if its **** I'll pass. I know the optical sensor is what craps out on these things and I remember a few years ago looking into replacing the sensor. Back then, I couldn't find just the sensor, seems though, times have changed.
Very interesting to see what everyone has to say.
https://www.amazon.com/Ignition-1992.../dp/B00FSC65P4
http://www.aipelectronics.com/index....nitac-lt1.html
And various other locations on the inter-wide-web...
1) Has anyone tried these AIP sensors more recently? Any luck? Longevity?
2) For those who already fixed their old sensors, are the opti's still going strong?
I literally have a milk crate full of dead opti's and this would be a really good way to save some cash but I just want to do my reserach before buying. If its a gamble I'll probably get it, but if its **** I'll pass. I know the optical sensor is what craps out on these things and I remember a few years ago looking into replacing the sensor. Back then, I couldn't find just the sensor, seems though, times have changed.
Very interesting to see what everyone has to say.
12-19-2016, 07:06 PM
#51
11 Second Club
Wow.. Never knew you could buy just the sensor.. I'd say try it and see.. Make history lol
