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Known Issues: Tiliqua R2.0 #19

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vk2seb opened this issue Jul 1, 2024 · 0 comments
Closed

Known Issues: Tiliqua R2.0 #19

vk2seb opened this issue Jul 1, 2024 · 0 comments

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@vk2seb
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vk2seb commented Jul 1, 2024

Some known issues and notes on bringing up the R2.0 beta units:

  • WARN: always use the tiliqua mobo bus power ingress. The other 12V bus power (going straight into eurorack-pmod) has no polyfuse.

eurorack-pmod PCBA

tiliqua-mobo PCBA

  • Polyfuse too low for ~500mA max. current draw when Tiliqua is used to source current in USB host mode.
    • No USB host example projects yet, need this for validation
    • I tried drawing this kind of current, nothing blows up. The tiliqua will just turn off and the built-in polyfuse resets 30sec later.
    • Using the eurorack-pmod power ingress instead is an easy workaround for host testing
  • Encoder locating pin sticks out too far.
  • V-Score slightly too close to panel, causing tilt on mobo PCBA. A shim washer on the encoder should also help with this.

soldiercrab PCBA

  • LEDs are too bright, current limiting resistors should be larger.
  • Gets a bit warm (but not too hot to touch). Ground mounting hole on both sides for better heatsinking & shielding. Switching to smaller ECP5/PSRAM should also help with this alongside 3V3 -> 1V8 on the PSRAM/USB PHY rails.
  • Increase copper clearance at edges to reduce dimensions on all sides by ~0.2mm

panel PCBA

  • Plate slots for DVI/USB for better shielding
  • Fix DVI panel cutout, it's close but not perfect
  • Fix rounding on the LED encoder ring cutout.
@vk2seb vk2seb closed this as completed Aug 4, 2024
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