Cheap-O (the sub $2 magnetic endstop)
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Published on June 3, 2012
Description
This is the simplified DIY version of a magnetic endstop. Instead of using a hall effect sensor and some logic, it uses a hall switch. So the board is much simpler.
PLUS - it has a control LED.
Cheap-O in action: youtube.com/watch?v=smRay_nAUWA
Update: Improved STL for super slim design.
PLUS - it has a control LED.
Cheap-O in action: youtube.com/watch?v=smRay_nAUWA
Update: Improved STL for super slim design.
Instructions
Get a TLE4905 (for about 1 EUR), 2 x 4.7 nF caps, a LED, 1.2kOhm and 3.3kOhm resistors and a tiny piece of strip board pcb (I needed 7 strips by 5 holes).
Drill 2 3 mm holes.
Solder according to photos and schematic.
Mount.
Glue a magnet to your axis (I used 3 mm neodym cubes).
enjoy your cheap and accurate endstop.
Drill 2 3 mm holes.
Solder according to photos and schematic.
Mount.
Glue a magnet to your axis (I used 3 mm neodym cubes).
enjoy your cheap and accurate endstop.
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License
Cheap-O (the sub $2 magnetic endstop) by hmeyer is licensed under the Attribution - Share Alike - Creative Commons license.
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Am I reading it wrong, or does your schematic have the resistor values swapped?
I built a couple, with the resistors changed around, and they seem to work so far, except for one thing that I don't understand.
In your video, the LED comes on when the magnet approaches the sensor.
With mine, the LED goes off when the magnet approaches the sensor. Should I care?
corrected
Oh. You are correct. I'll have to correct that.