Post by thread:[EE]: Linear hall effect sensors

Hello, I'm looking for a linear output hall effect sensor. The Melexis MLX90215 seens to be ideal for my application but I don't want to expend US$750 on the programmer. Someone knows a non-programmable linear hall sensor? Low cost? What about doing my own MLX90215 programmer? Thank you very much, Brusque -- ----------------------------------------------------------------- Edson Brusque C.I.Tronics Lighting Designers Ltda Research and Development Blumenau - SC - Brazil Say NO to HTML mail http://www.citronics.com.br ----------------------------------------------------------------- -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Allegro also makes them, and their web site has those two magic words - "Request Samples". I'll find out whether they'll send any to someone who doesn't work for an electronics company and expects to order a total of 0 every year... :) You might also be able to use the Melexis sensors without programming them - aren't they set up to be at least usable by default? Edson Brusque wrote: {Quote hidden}> > Hello, > > I'm looking for a linear output hall effect sensor. > > The Melexis MLX90215 seens to be ideal for my application but I > don't want to expend US$750 on the programmer. > > Someone knows a non-programmable linear hall sensor? Low cost? > > What about doing my own MLX90215 programmer? > > Thank you very much, > > Brusque > -- > ----------------------------------------------------------------- > Edson Brusque C.I.Tronics Lighting Designers Ltda > Research and Development Blumenau - SC - Brazil > Say NO to HTML mail http://www.citronics.com.br > ----------------------------------------------------------------- > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

> > I'm looking for a linear output hall effect sensor. > > > > The Melexis MLX90215 seens to be ideal for my application but I > > don't want to expend US$750 on the programmer. Allefro A3515, A3516 5mV/gauss and 2.5 mV/gauss Allegro application note 27702A Better in many ways than the following Older, cheapewr, more temperature sensitive. UGN3501, -03, -08, -07, -06, Digikey search on linear hall gives 8 matches (mostly similar). RM -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Putting together a DIY pgmr shouldn't be too hard. There is enough technical doc in the spec sheet to do it. (PWM for data bits (<150us=0, >150=1) after you take VCC to 12V. Take Vcc to 18V to make the setting permanent (plus set the 'write' bit). The sensors are NOT usable until programmed since the default pgmg load is all FF (or 00, I can't recall exactly). I have a several for experimentation, but can't seem to get a response out of the factory confirming the programming info I deduced from the spec sheet. What I do like is their ability for their response to be 'normalized' so that variability in magnets is compensated at the completed sensor, instead of within the program code. Robert Edson Brusque wrote: {Quote hidden}> > Hello, > > I'm looking for a linear output hall effect sensor. > > The Melexis MLX90215 seens to be ideal for my application but I > don't want to expend US$750 on the programmer. > > Someone knows a non-programmable linear hall sensor? Low cost? > > What about doing my own MLX90215 programmer? > > Thank you very much, > > Brusque -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email spam_OUTlistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body

Hi Edson, I cannot download the datasheet on the Melexis web site for the device you mentioned, but it sounds very similar to the Micronas HAL 805, also a programmable linear hall effect sensor. I think the HAL 805 is a bit expensive (about 2.25 US$ ea in 1k quantities), but it works very well. I believe the programmer cost about $175 US, but looking at the programming protocol, it would be very easy to build. Micronas also makes a variety of other hall sensors, but I recall that the Allegro devices were more economical in the non-programmable style, and probably easier to get. Lyle Killough -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads