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What're you up to this weekend?

cstanton

I'm going to tinker with different soundcards I have, USB and PCI to see which is better at storing and playing audio from old vinyl records that I have.

What do/don't you have planned?

  • in reply to javagoza
    javagoza said:
    I like USB sound cards. I think they are more versatile

    They can have quirks, some certainly cap the frequencies lower than they claim; but I have an older USB Creative Soundblaster with a pre-amp that's useful for vinyl recording Slight smile

  • I am booked up building products (DMX transmitters and decoders) for one of my clients, how build Halloween props (animatronic Skulls and Arms).  This is his busy season so I am trying to well stocked so he can fulfill orders.

  • in reply to ralphjy

    My daughter lives up in Portland too.  She just had her A/C fixed in time for this latest heatwave, so she was very happy for that! Hang in there!

  • in reply to Jan Cumps

    Good news, it's working. A powerblinky :) Each LED  is controlled by a different ARM core.

    image

  • I am working on the part 2 of my blog on BeagleY-AI. ( BeagleY-AI Review - Part 1). I had a good time playing with the board in the past few days.
    The board is intended for EdgeAI/ML inference. But its quite sad that there are no real examples out there showcasing the DSP features.
    The example provided in the getting started guide TensorFlow Lite Object Detection runs at ~3FPS. The same model produces much better results on RPi5.
    The issue there is the examples are not utilizing the DSP Processors. I have made some progress on this. I would probably working on it the coming days.

    I have to prepare blog 1 on Eye on Intelligence Challenge as well.

  • Raspberry Pico and FreeRTOS tests.

    The RTOS can schedule and run tasks on both cores of a RP2040.
    I'm checking if this works well with the new Pico C/C++ SDK 2.0

  • Not intended for audio, but using audio op-amps!

    I'm trying to build an amplifier  KiCad 8: Working with Circuit Simulations!  for measuring low-voltage signals. Basically a better iteration of Viewing Noise with a Measurement Amplifier benefiting from the mistakes learned. For instance, I found the very low-frequency response not very useful. 10 Hz is ok. 

    I found 100 Hz low-pass filter wasn't that useful. Also, the switchable gain of 100 and 200 isn't that helpful either. A fixed gain of 100 would be fine.

    I don't think BNC are needed, smaller SMA is more convenient. Replacing batteries is annoying, so a rechargeable battery would be better.

     I think I want switchable low-pass filters at 10k, 100k and 1 MHz. And switchable DC or AC input (10 Hz as mentioned).

    Additional ideas welcome. 

  • Depending on how my SuperArtGirl is feeling (only one more month of chemo to go!), I'll either be picking rocks and fixing the parking area at the cottage, or at home trying to get my little CNC router working from the Raspberry Pi.

    We set up a woodworking area in the garage at the cottage, so I am hoping the CNC will be able to add some interest to some of the smaller projects Slight smile

  • I’m currently printing a holder for an outdoor temp/humidity sensor.  We’ve been having miserably hot weather and I’m deploying more sensors to more optimally operate my HVAC unit.

  • I printed a 3D part at someone, tomorrow I would like to install the electronic circuit. Among other things. NerdGrin