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Update Readme on analog part

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whowechina 2023-04-19 20:40:36 +08:00
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README.md
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@ -122,16 +122,17 @@ It's very small and requires higher accuracy.
<img src="doc/pogopin_wiring.jpg" width="300px">
* If you go with analog (3.5mm headphone jack)
Crosstalk maybe no longer an issue, but ground level becomes a concern. When driving the turntable LED ring, there's a considerable amount of current travelling through the ground cable which lifts AS5600 ground level. There're two ways to handle this.
* One is to use a 5 wire cable, separate LED ground from the sensor ground. You can use a Type-C to Type-C cable, it normally has 5 wires inside. You can use red and black to power the LED and others to serve sensor ground and signals.
<img src="doc/5A_usb.jpg" width="300px">
<img src="doc/USB_ground.jpg" width="600px">
* The other one is to minimize the ground wire resistance. A metal braid shielding cable can be used with the metal shield serving as the ground line. Or you can find a 4 wire cable with thick core copper.
Here's the pin definition.
<img src="doc/headphone_jack_wiring.png" width="200px">
The "ANGLE" is the AS5600 analog OUT. You need to remove a resistor to get OUT pin working.
The "ANGLE" connects to the AS5600 analog OUT. You need to remove a resistor from as5600 board to get OUT pin working.
<img src="doc/as5600_mod.png" width="300px">
Note: For analog, crosstalk maybe no longer an issue, but ground level becomes a new concern. When driving the turntable LED ring, there's a considerable amount of current travelling through the ground cable which lifts AS5600 ground level. There're two ways to handle this.
* One is to use a 5 wire cable. You need to separate LED ground from the sensor ground. A typical Type-C to Type-C cable has 5 wires inside. You can use red and black to power the LED and others to serve sensor ground, sensor analog out and LED signal.
<img src="doc/5A_usb.jpg" width="300px">
* The other one is to minimize the ground wire resistance. A metal braid shielding cable can be used with the metal shield serving as the ground line. Or you can find a 4 wire cable with thick core copper.
### Step 4 - Assemble
* Assemble the turntable
I don't know how to draw an explosion diagram, this is done by coding in OpenSCAD:

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