The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

The New Hotness

  • Prusa MK4 Camera Lighting: FAIL

    Well, this didn’t take long:

    Prusa MK4 - Extruder sidelight - COB LED failure
    Prusa MK4 – Extruder sidelight – COB LED failure

    The upper five-LED string in the middle module failed open-circuit, which left the remaining two strings handling too much current. The five LEDs across the middle look like they’re running at War Emergency Power and the lower five are limping along:

    COB LED failure - detail
    COB LED failure – detail

    The dark spots in the middle are overexposed pixels.

    I soldered in a replacement from the same bag and it’s all good again, but I expect that won’t last very long.