Magnetic Rotary Encoder Eval

I got some samples of the nifty looking AS5040 10-bit magnetic rotary encoder IC from Austria Microsystems.  I want to do some experiments with these chips to possibly replace the mechanically coupled encoder I was planning to use to measure the spindle speed on my CNC mill.  The chips basically have Hall Effect sensors and signal processing internally to automatically detect the rotation of a magnet with very good precision (1024 counts per rotation, or 0.35 degrees per count!).  They can run up to 30,000 RPM, so speed is no issue for my application.  They can output quadrature like a regular mechanical or optical encoder, commutation signals for brushless motor control, or you can talk to them over a SPI bus.  Very cool!

To test out the chip (and possibly actually use it in my applications), I needed a PC board.  Laen’s service is a no-brainer when it comes to making a small board, as it’s practically free.  Here’s the little board I put together (red is top layer, blue is bottom layer (flipped).

And, if you’re interested, here is the schematic.

Related Posts

Bike Light GoPro Mount Adapter

Here’s another quick and practical project that I knocked off in a couple evenings.  My new POC mountain bike helmet has a non-standard venting arrangement, which makes…

Bicycle Disc Brake Caliper Mount

[ngg src=”galleries” ids=”11″ sortorder=”140,141,134,135,136,137,138,139″ display=”basic_slideshow”]It’s no secret that I can get pretty wrapped up in projects.  Witness a “small” project that I took on for a friend,…

Camera Slider Track

I have long wanted to work on some motion-controlled camera rigs, for time lapse and moving video shot purposes.  The longest-brewing idea I have had is for…

AZIZ! Light!

In an earlier post back at the beginning of this month, I described the beginnings of my DIY microscope illuminator project, dubbed Project AZIZ.  At that point…

Diansu DS-982 Solder Paste Dispenser

I did a review, mini-teardown, and test of an imported pneumatic solder paste dispenser that I picked up on eBay. [youtube 9RdAL-ysBhA]

Project Aziz

My recent acquisition of a stereo microscope for the electronics lab has brought about a couple of side-projects.  One of them is the custom boom stand that…

This Post Has 7 Comments

  1. Nice looking boards wow did these work out for you? I have a few of the AS5040 I got as samples and was going to try and make my own pcb this week. Is there any chance you would share the PCB layout files and schematic with me?

    Kind regards

Leave a Reply

Your email address will not be published.