Driving a miniscribe motor to make vintage sounds

[MacOfAllTrades]

Why? To hear the miniscribe sounds while I use my blueScsi

wtf? My miniscribe never worked and I gave up on it, so I figured I’d try to drive the stepper motor with some modern circuitry with the hope being that one day I could signal it by the activity indicator on a blueSCSI.

how’s it going? Well i’m doing it with a raspberry pi and adafruit dc motor hat and libraries. I must say the sound is not sounding like the original so far :-\. But let’s see how it goes.

I wanna hear!
Ok see attached video.

questions:
Can someone explain the pinout on the position sensor? I can’t for the life if me reverse engineer it. Im wondering if my sensor may be busted or something. If i can figure it out I could rig it up to indicate when I’m going too far in my motor movements and be able to initialize the motor. Otherwise I’ll have to add my own sensor.

question 2: anyone know the true “home position” for the motor and the read head? I fear I have misaligned mine (not a big deal as I was ready for development to be destructive…)

 

[MacOfAllTrades]

Tweaked it and made a few functions to emulate the sound of hard drive initialization and then bootup.
i set the audio recording to a few stills of a mac starting. I think it sounds alright!

 

[MacOfAllTrades]

Ok now I (cheaply) hooked it up to the activity LED on my raspberry pi so it makes the hard drive make noises when the activity light flickers.
Gotta say it’s sweert—- next I’ll do this on my blueSCSI and put the drive back in my mac and get that miniscribe feel with blueScsi speed. @eric - can’t wait for activity led to work with wifi on v2 so I can have it all working together.

Also - im doing this with a motor hat and 2 GPIO pins on my raspberry pi but I believe the motor hat just uses i2c so (assuming 2 gpio pins are free..) i could probably do this on the blueSCSI v2 itself…!!
question is what I have to modify the build on it or could I somehow use an existing building, but get it to launch a script or other program at lunch?

 

[MacOfAllTrades]

Released code with ref. circuit on Git for the benefit of the community

 

[eric]

@eric - can’t wait for activity led to work with wifi on v2 so I can have it all working together.

To clarify, it is only the LED on the Pico - the pin headers for LED's are driven off the SCSI bus - so should still work fine

 

[MacOfAllTrades]

To clarify, it is only the LED on the Pico - the pin headers for LED's are driven off the SCSI bus - so should still work fine

Here she is hooked up to BlueSCSI v2 pico w!

@eric This is no slight against an amazing feature that is only in BETA but I see once a network application is launched, the BlueSCSI activity light just about pulses forever— must be some sort of network upkeep activity that the daynaport driver does?

 

[eric]

The pico-w buffers packets then the daynaport driver polls the scsi device for new packets periodically - so yes you'll get a blink while using networking.