Nice PCB, sensor is marked as "3144", so its a (compatible) Allegro 3144 digital hall switch specified for up to 150°C and 4.5V to 28V supply voltage. Pinout is simple (like as shown in the allegro datasheet): - Gnd + Power supply (e.g. +5V) S Signal I added a 10kOhm pullup-resistor between (+) and (S)ignal and just tested at 5V and 3.3V with some small Neodym magnets (from CD-ROM drive pickups). => Sensor runs fine even at 3.3V! Output is an open collector logic, so "open" means no magnetic field, "0V" = "closed" means magnetic field nearby. But anyway: the signal LED incl. pre-resistor which is clearly shown in the BG product pic was missing on all of my 5 PCB.

Nice PCB, sensor is marked as "3144", so its a (compatible) Allegro 3144 digital hall switch specified for up to 150°C and 4.5V to 28V supply voltage. Pinout is simple (like as shown in the allegro datasheet): - Gnd + Power supply (e.g. +5V) S Signal I added a 10kOhm pullup-resistor between (+) and (S)ignal and just tested at 5V and 3.3V with some small Neodym magnets (from CD-ROM drive pickups). => Sensor runs fine even at 3.3V! Output is an open collector logic, so "open" means no magnetic field, "0V" = "closed" means magnetic field nearby. But anyway: the signal LED incl. pre-resistor which is clearly shown in the BG product pic was missing on all of my 5 PCB.

Nice PCB, sensor is marked as "3144", so its a (compatible) Allegro 3144 digital hall switch specified for up to 150°C and 4.5V to 28V supply voltage. Pinout is simple (like as shown in the allegro datasheet): - Gnd + Power supply (e.g. +5V) S Signal I added a 10kOhm pullup-resistor between (+) and (S)ignal and just tested at 5V and 3.3V with some small Neodym magnets (from CD-ROM drive pickups). => Sensor runs fine even at 3.3V! Output is an open collector logic, so "open" means no magnetic field, "0V" = "closed" means magnetic field nearby. But anyway: the signal LED incl. pre-resistor which is clearly shown in the BG product pic was missing on all of my 5 PCB.

C'est une sortie à collecteur ouvert il faut une résistance de triage au plus VCC (PullUp). Pas de brochage sur le site. Le - correspond à GND Le S correspond à la sortie (OUT) La borne du milieu est le VCC.

C'est une sortie à collecteur ouvert il faut une résistance de triage au plus VCC (PullUp). Pas de brochage sur le site. Le - correspond à GND Le S correspond à la sortie (OUT) La borne du milieu est le VCC.

C'est une sortie à collecteur ouvert il faut une résistance de triage au plus VCC (PullUp). Pas de brochage sur le site. Le - correspond à GND Le S correspond à la sortie (OUT) La borne du milieu est le VCC.

in contrary of my last order of this product everything is ok with this one, really good packaging and controller is perfect.

in contrary of my last order of this product everything is ok with this one, really good packaging and controller is perfect.

in contrary of my last order of this product everything is ok with this one, really good packaging and controller is perfect.

this package of 5 units are perfect but I order 4 more packages and the PCB was not complete, no resistor and no led soldered on the board. look at photos.

this package of 5 units are perfect but I order 4 more packages and the PCB was not complete, no resistor and no led soldered on the board. look at photos.

this package of 5 units are perfect but I order 4 more packages and the PCB was not complete, no resistor and no led soldered on the board. look at photos.

We all know we're taking a risk ordering direct from a faraway land. The risk is that an inexpensive unit may have quality control issues. The Hall Effect Magnetic Sensor for Arduino (and other hobby embedded computer boards) works with a magnet nearby. Only 1 out of 10 sensors failed to light the onboard red LED. The Banggood 3 day return, or 5 day replacement, warranty is much too short of a time to analyze electronic parts. Buying a variety of sensors for Arduino means that: - you will have to locate the documentation on your own, - download the software for Arduino from somewhere else, - learn to program an Arduino or compatible processor, - test the parts using software you write for the Arduino. Basically you will do a college project in the one day between day 1 when the parts arrive, and before the end of day 3 you must have already made arrangements with Banggood for Return Merchandise Authorization number. You will need time to pack the defective item and reship the part back to the correct address which Banggood gives you. I fully expect Banggood to tell me “Please contact our return department and post a video of your non-working part” right after I send this review. (Feels like jumping through a hoop at the circus.) But in any case, I am thankful to be able to get good prices for the parts that work. My .mov file is waiting to be uploaded. I have a video of the failed part, and a good part for comparison.

We all know we're taking a risk ordering direct from a faraway land. The risk is that an inexpensive unit may have quality control issues. The Hall Effect Magnetic Sensor for Arduino (and other hobby embedded computer boards) works with a magnet nearby. Only 1 out of 10 sensors failed to light the onboard red LED. The Banggood 3 day return, or 5 day replacement, warranty is much too short of a time to analyze electronic parts. Buying a variety of sensors for Arduino means that: - you will have to locate the documentation on your own, - download the software for Arduino from somewhere else, - learn to program an Arduino or compatible processor, - test the parts using software you write for the Arduino. Basically you will do a college project in the one day between day 1 when the parts arrive, and before the end of day 3 you must have already made arrangements with Banggood for Return Merchandise Authorization number. You will need time to pack the defective item and reship the part back to the correct address which Banggood gives you. I fully expect Banggood to tell me “Please contact our return department and post a video of your non-working part” right after I send this review. (Feels like jumping through a hoop at the circus.) But in any case, I am thankful to be able to get good prices for the parts that work. My .mov file is waiting to be uploaded. I have a video of the failed part, and a good part for comparison.

We all know we're taking a risk ordering direct from a faraway land. The risk is that an inexpensive unit may have quality control issues. The Hall Effect Magnetic Sensor for Arduino (and other hobby embedded computer boards) works with a magnet nearby. Only 1 out of 10 sensors failed to light the onboard red LED. The Banggood 3 day return, or 5 day replacement, warranty is much too short of a time to analyze electronic parts. Buying a variety of sensors for Arduino means that: - you will have to locate the documentation on your own, - download the software for Arduino from somewhere else, - learn to program an Arduino or compatible processor, - test the parts using software you write for the Arduino. Basically you will do a college project in the one day between day 1 when the parts arrive, and before the end of day 3 you must have already made arrangements with Banggood for Return Merchandise Authorization number. You will need time to pack the defective item and reship the part back to the correct address which Banggood gives you. I fully expect Banggood to tell me “Please contact our return department and post a video of your non-working part” right after I send this review. (Feels like jumping through a hoop at the circus.) But in any case, I am thankful to be able to get good prices for the parts that work. My .mov file is waiting to be uploaded. I have a video of the failed part, and a good part for comparison.

very good

very good

very good

works as its supposed to. very good

works as its supposed to. very good

works as its supposed to. very good

ok

ok

ok

no complaints

no complaints

no complaints

Super sensor.works fine.good price

Super sensor.works fine.good price

Super sensor.works fine.good price