Tore down some optispark sensors today
03-12-2015, 06:50 AM
#21
Here we go again. If you guys can't stop attacking each other, we will be putting people on vacation.
card0, even though you didn't initiate this one, your past actions have made you a target on this forum. You did however choose to escalate this situation into yet another downward spiral. I've warned you in the past that this will not be tolerated. If we see this happen one more time on here, you will be banned.
Anyone else that decides to make comments towards cardo0 and stoke the fire will also be dealt with accordingly.
card0, even though you didn't initiate this one, your past actions have made you a target on this forum. You did however choose to escalate this situation into yet another downward spiral. I've warned you in the past that this will not be tolerated. If we see this happen one more time on here, you will be banned.
Anyone else that decides to make comments towards cardo0 and stoke the fire will also be dealt with accordingly.
07-28-2015, 09:55 AM
#24
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The bigger bottom piece is just a small flathead or something similar to pry it out, it's glued around it's perimeter. The small top piece has those two plastic posts that you have to scrape down with an exacto until they are flush with the cover and then pry it off. I think that one was glued around the perimeter too but I don't remember exactly.
Also, it's been what, 5 months now? My repaired chinese sensor hasn't missed a beat so far!
Also, it's been what, 5 months now? My repaired chinese sensor hasn't missed a beat so far!
07-28-2015, 04:42 PM
#26
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Looks like mine might have failed do too a lost connection on both the high and low resolution output connections. I will try to solder them back together and test it on the oscilloscope.
07-28-2015, 05:22 PM
#27
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Yeah, it's made to sit next to a hot engine the glue probably doesn't loosen with heat very much.
You can see in my pictures the lip around the outside is where it's glued, if you can't get it by prying you could try to dremel it away. If you stay on the edge you should be able to stay well away from the electronics. I would re-attach it with silicone anyway to seal everything up so destroying the edge isn't a big deal.
Make sure to check all the obvious stuff too like 5v and ground to the sensor.
You can see in my pictures the lip around the outside is where it's glued, if you can't get it by prying you could try to dremel it away. If you stay on the edge you should be able to stay well away from the electronics. I would re-attach it with silicone anyway to seal everything up so destroying the edge isn't a big deal.
Make sure to check all the obvious stuff too like 5v and ground to the sensor.
07-28-2015, 05:26 PM
#28
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I broke the plastic off. So if I do fix it I will have to seal it back up some kind of way. So I hooked it up and now it have lost ground, some where. everything seems to check out. It is not drawing current anymore. Before, it was drawing .04 amps, now nothing.
It would have been fixed if I hadn't done that.
07-29-2015, 08:34 AM
#32
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It was soldered to the board on mine. The goop is only there to protect the electronics from moisture/corrosion. Entirely possible your heat gun got it hot enough to melt the solder though.
07-31-2015, 08:19 PM
#35
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I couldn't quite see in the video but did you attach the little alligator clips that are on your scope probes to your power supply's ground? That will drive you nuts if you don't. These are square waves that you should be seeing, the sensor doesn't put out a sin wave.
07-31-2015, 08:40 PM
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I don't get a square wave I get a really sharp sine wave, more like a zig zag and a strait line when not in an opening. When I attach the ground to my power supply ground. I was also expecting a square wave.
07-31-2015, 08:50 PM
#37
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Sounds like something is still off, you can test to see if your scope is working by simply touching ground and 5v with your scope (not at the same time obviously). Ground should just be a flat line like when you have that channel off and 5v should also be a flat line but higher. If you are seeing that sin wave when you are touching either of those with the scope I'd guess the scope has a weird setting or could possibly be broken.
07-31-2015, 08:57 PM
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The scope is fine, even when I check it on my calibration terminal I get a nice square wave and when I attach it to the DC power source I get a strait line. So, something is definitely off with this sensor.
07-31-2015, 09:23 PM
#40
FWIW you can now buy just the optical portion of an opti for ~50 on ebay.
Of course its the chinese aftermarket junk, but for $50 if you're brave you can rebuild an opti. Maybe open it before hand to verify solder joints and reseal it with silicone?
Of course its the chinese aftermarket junk, but for $50 if you're brave you can rebuild an opti. Maybe open it before hand to verify solder joints and reseal it with silicone?