#✅ - toggle reed switch

6 messages · Page 1 of 1 (latest)

flint peakBOT
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clever spindle
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Yes, it is called a “hall effect sensor” , but it is not wired up like a switch and requires some extra circuit design.

graceful perch
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not all of them need exterior parts, for instance the AH3503UA, AH3661UA and the texas instruments DRV5053EAQLPGM can be used without extra components if you are only using them as switch, if you want to set them off at a specific distance from the magnet you need additional components. I use these things as endswitches on my delta printer without external components, if you just plug them in the connector for the end switches. they will switch when a magnet comes near.i have 2mm magnets on my cariages and use these hall effect sensors that look like transistors to detect the carriage at the top of the printer printer the magnets almost have to touch the sensor to switch

graceful perch
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these hall effect sensors that i named can be plugged in directly in the 3 terminal connectors for end stops of a printer control board and with 1 or 2 capacitors you can set the sensitivity of those sensors. and indeed, on my delta printer (Duet 2 WIFI controlboard) i abuse them as switches. and they are smaller than reed switches (4mm x 3.1 mm x 1.5 mm TO-92 package)

graceful perch
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yes they turn of when not in the proximity of the magnet, but you don't use them as on of switches, but rather as pulse switches, on my deltaprinter, the magnet (2mm x 1 mm) passes the sensor mounted parallel to the rail and that sends it to a little loop in which the carriage goes a few mm further, then switches to reverse and when the manet gets in proximity again, it stops moving and sets the axis steps to 0, . so on the way back it just moves like 2 steps or so, then stops, always exactly on the same point. its a matter of polling the sensor and run a loop in the program accordingly.

flint peakBOT