Today is a turning point for the project. The turntable is finished.
And now that the table is publishing data to the cloud, it's officially a Thing.
If I was a stressful person, a big weight would fall of my shoulders now.
I'm not a stressful person. But I am happy that I reached this point.
A point of luxury and freedom. I still have loads of time to tap into the cloud part. To creativity!
What's Built into the Table
There are two Arduinos -Yún and UNO, the Infineon Motor Shield and various electronics.
The Yún has audio sample, light organ+servo lift, and MQTT publishing duty.
The protoboard on top of the Yún has a one transistor pre-amplifier + DC biaser. The duty of that little circuit is to push the AC audio into the 0->5V range of the Arduino ADC.
It also holds the connectors for the stepper motor and the light organ LEDs.
The UNO serves as motor speed controller. It measures the speed from the IR optocoupler that I've built for this project.
The UNO uses the Infineon Motor Shield to control the motor, and also shows what's happening on 3 LEDs (fast - on speed -slow).
Everything runs now, and the Perpetuum Ebner is happily sharing the spectrum analysis on the internet.
I can spend the remaining time on the satellite ideas. They'll tap into that MQTT stream and do something with it.
And unbox the SAMA5D4 again. It's been neglected the last weeks.
And I can also spend a sunny warm evening outside to finalize the mounting of the devices on the sub-chassis.
As you can see on the photo below, there's room for (invisible) improvement there.