Search results

  1. alxlab

    This lucky LC II power supply 699-0153 (TDK) got the deluxe treatment with solid polymer caps...

    This lucky LC II power supply 699-0153 (TDK) got the deluxe treatment with solid polymer caps. Think I got another 6 I need to do...
  2. alxlab

    Quadra 950 CD Audio Cable?

    Wonder if these KF2510 will work https://www.aliexpress.com/item/1005002897922435.html Just bought some to test. Will find out in a month.
  3. alxlab

    Compact Mac Video Adapter

    If we wanted to use the PicoVGA library it sound like it would a specific frequency for the different resolutions. Maybe this will cause an issue if we need a different frequency for input and another for output?
  4. alxlab

    Compact Mac Video Adapter

    It's from a book called Macintosh Repair & Upgrade Secrets It's from the Macintosh Repair & Upgrade Secrets book by Larry Pina. I just posted it up in the resources: https://tinkerdifferent.com/resources/macintosh-repair-upgrade-secrets-for-models-128k-to-macintosh-se.42/
  5. alxlab

    Macintosh Repair & Upgrade Secrets For Models 128K to Macintosh SE

    Another great repair book by Larry Pina for the Macintosh 128K to SE. Also include schematic for a compact Mac to TTL monitor adapter. Also has the bom for the analog boards.
  6. alxlab

    WarpSE: 25 MHz 68HC000-based accelerator for Mac SE

    Just curious but on your power board I noticed you use two XOR chips and separate the RGB signals VS just connect the RGB pins all together like on t http://www.waveguide.se/?article=compact-mac-video-adapter I was wondering what the logic behind the design is?
  7. alxlab

    WarpSE: 25 MHz 68HC000-based accelerator for Mac SE

    Oh that picture of the SE video signal is gold! Yeah it's exactly what has been mentioned but never see a picture. Just to be clear for people, here's what normal VGA hsync with video signal should look like.
  8. alxlab

    Compact Mac Video Adapter

    Here's a link to the DVI sock PCB that someone might find useful: https://github.com/wren6991/pico-dvi-sock
  9. alxlab

    Apple TechStep Replacement ROMs, cartridges, software, and more!

    Glad to hear that the XC68HC711E9 wasn't protected. Got worried for a bit there.
  10. alxlab

    Compact Mac Video Adapter

    Don't think anyone has attempted anything yet with the pico pi. There are at least a couple sdks for doing video out on the pico: http://www.breatharian.eu/hw/picovga/index_en.html https://picockpit.com/raspberry-pi/raspberry-pi-pico-video-output/ Ideally we would want 1024 x 768 output so we...
  11. alxlab

    Compact Mac Video Adapter

    Sorry I wasn't clear enough. This discussion was to make the cheapest purpose built converter to just output video from a compact Macintosh which is 512 x 384 and 1bit. Using the analogy of slicing bread, sure you can use an expensive Swiss Army Swiss Champ XXL (RGB2HDMI) with a bunch of extra...
  12. alxlab

    Quadra 950 CD Audio Cable?

    Just to make sure, you did removed the 2 jumpers from the connector you showed right?
  13. alxlab

    WarpSE: 25 MHz 68HC000-based accelerator for Mac SE

    Yeah those adapters are basically a breakout boards like Zane already has on his board. All Zane is missing the inverter. @Stephen already took the time to take apart the Plus version of the Power R inc adapter which is essentially the same thing as the SE one with different connectors...
  14. alxlab

    Compact Mac Video Adapter

    Here's a conversation with Zane about using a Pico Pi to convert the video signal from a compact Macintosh (128K, 512K, SE, SE/30, Classic, Classic II) to something more usable by modern screens. Maybe this will give some inspiration to someone. alxlab-zone66x — 02/07/2022 Was contemplating the...
  15. alxlab

    Apple TechStep Replacement ROMs, cartridges, software, and more!

    What's the link to the digikey page? I did a search for the part number FCN-215Q040-G/0 but it didn't find anything useful.
  16. alxlab

    HP EliteBook 8740w GPU Upgrade

    I think the the real problem with the laptop is if you run something that uses both the CPU and GPU to the max the system will throttle due to heat. I got a i7 940xm and that thing runs hot, like 99C hot, just just streaming videos. I don't really play any modern games so the laptop is good...
  17. alxlab

    HP EliteBook 8740w GPU Upgrade

    Glad it helped! Yeah I didn't mention a specific bios because I don't know which bios' will work. I have no clue what bios Eurocom uses for their cards. My K5000M was a HP card and had a HP bios. The GTX 970M I have was bought from China and the subvendor of the card is marked as HP. Not sure...
  18. alxlab

    WarpSE: 25 MHz 68HC000-based accelerator for Mac SE

    This is really exciting! This might be the first Mac SE accelerator I might actually be able to get
  19. alxlab

    Bourns Again - Bourns 601 Series RC Network T-Filters Replacement

    Yeah might as well use C0G since the price difference is negligible for low production runs. I just updated the github README to include better BOM info and a Manufactuing section mentioning the release files for are JLCPCB specifically and 1mm PCB thickness.
  20. alxlab

    Bourns Again - Bourns 601 Series RC Network T-Filters Replacement

    Actually the capacitor I originally chose was this: I need to update my BOM csv again from C1600 to C1649