Electronics > Projects, Designs, and Technical Stuff
Car in a box
coromonadalix:
Maybe it need an zero crossing signal ? plus and minus voltage with an zero reference ?
james_s:
That may be the case. The ABS sensors I've seen are all VR types, they work like the pickup on an electric guitar and sense the steel teeth passing by.
mintynet:
I have one of the ABS rings for the sensor and it is definitely magnetic, I'm going to try to build a rig to spin this next to the fixed sensors and see what I get on the scope.
This could be used going forward but I would prefer an electronic circuit to generate the wave form as this would be smaller and require no moving parts.
Thanks
Ian
Rerouter:
That exact waveform is from a proximity sensor that is fed through a AC coupling capacitor, with a biasing resistor tugging it back to ground, easy enough to simulate with your arduino aswell, just need to fiddle with the capacitor and resistor value to match what is on screen.
--- Code: ---http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+43%0AR+176+176+96+176+0+2+40+5+0+0+0.5%0Ac+176+176+256+176+0+0.00001+-2.12110699839023%0Ar+256+176+256+240+0+1000%0Ag+256+240+256+256+0%0AO+256+176+336+176+0%0Ao+4+64+0+4098+10+0.1+0+1%0A
--- End code ---
GeorgeOfTheJungle:
Yep, a square wave ac coupled should do the trick.
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