lsdweb
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| posted on 7/5/08 at 08:47 PM |
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Testing a Hall Sensor
Hi all
I'm trying to get my R1 running but can't get a 'signal' from my cam sensor
(previous thread)
It's set up as follows:
12v feed to live (blue)
Sensor earth to ECU earth (blue/black)
Signal to ECU (white/black)
 
cam sensor wiring
I've tried testing it off the engine with a similar setup but I get no change in the signal voltage when I move a metallic object across the
sensor. The sensor gets really hot as well!
Any thoughts?
Wyn
[Edited on 7/5/08 by lsdweb]
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mark chandler
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| posted on 7/5/08 at 09:57 PM |
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When I tried testing a hall sensor I failed to get any response by hand, I resorted to offering it to the spinning jaws of my lathe.
So if you have not got a lathe try a standard drill, the wifes kenwood mixer etc, anything that has a spinner and hold it close.
I do not think it should get hot.
Regards Mark
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MikeRJ
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| posted on 7/5/08 at 11:30 PM |
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quote:
Originally posted by lsdweb
It's set up as follows:
12v feed to live (blue)
Sensor earth to ECU earth (blue/black)
Signal to ECU (white/black)
Is it definately a 12v Hall sensor? Many of them are 5v parts, which would explain the getting hot and not working. You may have a nice desk
ornament there...
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Werner Van Loock
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| posted on 8/5/08 at 06:13 AM |
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I also thought they're 5V, best to check with a manual or something.
http://www.clubstylus.be
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02GF74
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| posted on 8/5/08 at 06:38 AM |
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off the shelf Hall sensor ICs that I have seen operate at 10 V max - having said that just looked at RS and see some will run at 30 V ... but as ^^^
said, yours may run on 5 V.
If certainly shouldn't get hot, let alone warm.
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lsdweb
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| posted on 8/5/08 at 12:13 PM |
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Thanks guys
I've been running it on 5 volts not 12 - sorry! In the car it runs off the 5v sensor feed from the ECU and, on the bench, I've used a
mobile phone charger (5.9v roughly) so it should be within its working parameters.
The annoying thing is I've tested two sensors (spare engine) and neither seems to give me a signal - I'll have to try the spinning
technique although I'm getting nothing with the sensor in the engine when it's running!
I must be doing something totally stupid!
Wyn
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MikeRJ
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| posted on 8/5/08 at 02:15 PM |
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It's possible that it has an open collector output, so try adding a pull up resistor on the output to +5v. 2k ohms or so should be fine.
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