Pickup Gaussmeter v.3.0

[BadHorsie]

The probe is double sided; What is the advantage of using both sensors on the probe.

[-Elepro-]

with ad22151 you have a wide range (more than +/- 5000 gauss) and can measure all magnets.... neo too....
with a1302 you have about +/- 1650 Gauss range then you can measure only ceramic and alnico magnets....(but with more precision)

so you can choose if you want a1302 or ad22151 or both.....

bye

[BadHorsie]

Thanks -Elepro. I have both on order and will use both. I guess I am all set part wise. I think I have everything sorted now. Once everything arrives I might have a few questions during assembly.

[RedHouse]

That's a good looking board.

pcb silk screen show right orientation of all components....
let me know if you have trouble...

bye

[copperheadroads]

thanks Elepro .......i got mint in the mail this morning

[t-minik]

I got mine this morning to .

great job.

[BadHorsie]

Hey -Elepro- on the AD22151 sensor in the picture I can clearly see that the tow outer legs of the sensor is soldered. I can also see that on the bottom that the the two legs on the left side is soldered and the leg on the bottom right side is soldered. Are the two middle unused legs on the top and the 1 on the bottom left not soldered. Click on the picture to see exactly what i am talking about.

[salvarsan]

Elepro wired the AD22151 for unity gain and no temperature compensation.
At unity gain, you get the +/-5000 gauss range.
Since the device will get used near 20C/72F, the tempco isn't needed.
Fewer parts == cheaper build cost.

-drh

[BadHorsie]

I am just trying to find out what the status of the three unused connectors on the sensor. I am having a hard time making it out in the picture as it is a little out of focus.

[BadHorsie]

So are you saying they are just left alone because they are not needed.

[-Elepro-]

Hey -Elepro- on the AD22151 sensor in the picture I can clearly see that the tow outer legs of the sensor is soldered. I can also see that on the bottom that the the two legs on the left side is soldered and the leg on the bottom right side is soldered. Are the two middle unused legs on the top and the 1 on the bottom left not soldered. Click on the picture to see exactly what i am talking about.

pin used are 4 5 6 and 8.... the pin 1 has soldering just for a better solidity....

....Since the device will get used near 20C/72F, the tempco isn't needed.
Fewer parts == cheaper build cost.

-drh

from 10C/50F to 35C/95F gain variation has +/- 1% error.... but.... i do not measure magnet in the garden in winter or at the sea in summer .....

i think that temperature compensation of this chip is useful for automotive application (trhottle/valve position sensing) where there is a more wide range of temperaure

bye

[BillScheltema]

Elepro,

Just got my board and chip in today.
Thanks alot.

Bill

[BadHorsie]

I just pulled the data sheet PDF and it makes since to me now. I am learning Slowly, but learning. Thank you

[fletch]

Please note

someone changed the quantity of some component in the mouser basket link in reply #3.... compare quantity with list in that reply....

Ahh.. that just completely stuffed my order up with Mouser which I just paid for.. why would anyone change that list around ?

EDIT: I just emailed Mouser with amendments to my order, hopefully they can include the stuff that was missing from the list

[pavel]

Got my board today in the mail. I thought I had the right sensor already but it turns out I had an A1323 which appears to be 4x more sensitive, so I guess I'll have to wait for an a1302 :-(.

Elepro, you mentioned posting some more pfds?

Thanks!