hall sensor for hihat input wiring diagram.

[Rob]

That sensor looks promising. I'll order one and let you know how it goes.

[mprinz]

Here in Germany I have to pay 18€ for the shipping when ordering this part for 2 €...

The shops I normally order such parts from, dont have it.

[Rob]

If I spend $50 USD at a time, then shipping is free from Digikey, and there's always stuff I need to buy.

[mprinz]

Ah. Ok. Thank you. If I get everything right, this thing should work the way we need it...

[dsteinschneider]

Hi mprinz,

Over on the MegaDrum forum over the past many years everyone was using the A1302. I'm happy with how it's playing connected to the eDRUMin ED4 and ED10. I get that somewhat narrow green band but it plays great. The magnet is a "common" hard drive magnet - they are quite powerful.

[mprinz]

That's great!
I'm just taking Robs advice.
The SS495A with the 5V supply was working well, too. But ... if it can damage my beloved eDrumIn4?!

I have read, the A1302 ist out of production, and I am still wondering WHY it's working at 3.3 V. Hm ...
Maybe I got the data sheets wrong ... whatever.

I - one more - looked up the A1302 datasheet.
The graph are plotted between 4.5 and 6.0 V supply voltage but they stated that far above 5 V it will be pushed
to an non-linear output with less sensitivity, so, maybe the Honeywell guys don't want that to be possible and
cut the output at a supply V less than approx. 4.5 V. Whereas the A1302 Allegro guys dont care about. That's my guess...

[mprinz]

Hi Rob!

Did you notice the "Magnetic Sensitivity Options (At VCC = 5 V)":

– A1: 200 mV/mT, 20-mT Range
– A2: 100 mV/mT, 39-mT Range
– A3: 50 mV/mT, 79-mT Range
– A4: 25 mV/mT, 158-mT Range

May be important. I picked the 79mT = 760 Gauss sensor. Should be ok for neodymium magnets.

I found a local shop for electronics. They will order the sensors for me.

[Rob]

I picked A1. I'm sure between the two of us, we'll get something that works.

[Polyphonics]

So was the sensor I ordered not a good idea for edrumin?

[Rob]

So I got my A1 and the results are mixed. Powered by the 3.3v of the eDRUMin, it's a no go. The power from the eDRUMin runs through a 200 ohm current limiting resistor, and so there's just not enough juice.

If I bypass the current limiting resistor, or power it externally, it works very well. Extremely sensitive with a healthy voltage range (about 85%)