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.

Category: Photography & Images

Taking & making images.

  • Sony DSC-F717 Memory Stick Socket Cable Re-Rework

    Once again, the Memory Stick socket cable in my trusty DSC-F717 camera became erratic, leading to continuous C:13:01 “format error” crashes, so I tore it apart. Proceed as before, until the camera carcass disgorges the socket:

    DSC-F717 - Memory Stick socket - side latches
    DSC-F717 – Memory Stick socket – side latches

    Gently pry the metal cover outward to clear the latches along the sides:

    DSC-F717 - Memory Stick socket cover latches
    DSC-F717 – Memory Stick socket cover latches

    The cover remains held in place by two tabs inside the holes on either side of the Memory Stick contacts, one of which is already free in the previous photo:

    DSC-F717 - Memory Stick socket - bottom
    DSC-F717 – Memory Stick socket – bottom

    The small spring on the left ejects the Memory Stick and will, if suitably provoked, launch itself across the bench. Be prepared!

    Use a pointy instrument to ease those tabs away from their latches and pop the top:

    DSC-F717 - opened Memory Stick socket
    DSC-F717 – opened Memory Stick socket

    I cleaned the contacts, not that they appeared particularly filthy, gently bent them upward by three micro-smidgens to apply a bit more pressure to the card’s contacts, and reassembled the socket in reverse order.

    I put a strip of Kapton tape on the back of the cable termination paddle (shown here during the previous repair) to ensure a snug fit:

    DSC-F717 Memory Stick socket - cable entry
    DSC-F717 Memory Stick socket – cable entry

    Unfortunately, I snapped off a locking tab on one of the ribbon cable connections to the main board:

    DSC-F717 - broken cable clamp
    DSC-F717 – broken cable clamp

    The cable threads through the middle of the clamp, which then slides into the socket and applies pressure to the contacts through the cable: no clamp, no pressure, no good.

    For lack of anything smarter, I tamped the clamp into the socket and applied a strip of Kapton tape to maintain everything in more-or-less the right position:

    DSC-F717 - tape-anchored cable
    DSC-F717 – tape-anchored cable

    Definitely unpretty, but better than nothing. While I was in there, I reinforced the other connections with similar clamps.

    Reassemble the camera in reverse order and it’s all good:

    DSC-F717 - repaired - first image
    DSC-F717 – repaired – first image

    It probably won’t last another decade, but ya never know …

  • Turtles!

    Spotted in Lake Walton on an out-and-back ride to the Hopewell Junction Depot end of the rail trail:

    Turtles - Lake Walton - 2019-03-14
    Turtles – Lake Walton – 2019-03-14

    Mary counted & guesstimated fifty turtles in the backwater.

    They’re the snuggliest turtles I’ve ever seen:

    Turtles snuggling - Lake Walton - 2019-03-14
    Turtles snuggling – Lake Walton – 2019-03-14

    Taken with the Pixel XL at maximum zoom, hence the gritty overpixelization.

  • Monthly Image: Cutting Board Shadows

    Seen after topping bowls of chili late on a wintry day:

    Cutting board - grazing sunlight
    Cutting board – grazing sunlight

    Late afternoon sunlight streams across the living room and through the kitchen doorway to sidelight cheddar cheese crumbs on the far side of the kitchen.

    There’s also one magic wintry night when the full moon aligns with the front doorway to light the entire hallway floor for a few Stonehenge moments. It’s always a delightful surprise, even though I’m sure it’s predictable.

  • Sapcicle Season

    Once again, maple sap rises from the ground and falls from damaged branches:

    And, sometimes, a tiny sweet treat during our walks …

  • Sony NP-FS11 Battery Rebuild: 2019

    Three years on, it’s time to rebuild some NP-FS11 lithium battery packs for the ancient Sony F505V camera, starting with packs I’ve rebuilt several times before and the last four cells from 2016.

    The final test shows the 2011-F pack may power an LED blinky, but not much else:

    NP-FS11 - 2011-F 2016-GH - 2019-02-19
    NP-FS11 – 2011-F 2016-GH – 2019-02-19

    Although the total capacity is still about 1.3 A·h for the two best batteries, the camera says the weakest two are dead after a few photos.

    For reference while resoldering, the joints at the negative terminals:

    NP-FS11 battery rebuld - negative terminals
    NP-FS11 battery rebuld – negative terminals

    And the protection PCB on the positive end:

    NP-FS11 battery rebuld - positive terminals
    NP-FS11 battery rebuld – positive terminals

    Unsolder the strap in the middle and the B+ positive connection on the right side to remove the cells.

    If cameras used bare cells, rather than glued-shut “proprietary” packs with super-secret unique ID ROMs, they’d be easier to keep running. My Sony DSC-H5 has other problems, but NiMH AA cells are easy to find.

  • Monthly Science: Lithium Cells vs. Low Discharge Current

    The amount of energy you can extract from a battery depends strongly on the discharge current, which is why the advertised capacity always exceeds the real-world capacity. Testing the NP-BX1 batteries for my Sony HDR-AS30V at about an amp produces a reasonable estimate of their run time in the camera:

    Sony NP-BX1 - Wasabi GHIJK - 2017-09-01 - annotated
    Sony NP-BX1 – Wasabi GHIJK – 2017-09-01 – annotated

    Even though defunct cells lack enough capacity to keep the camera alive during a typical bike ride, they should power a microcontroller or astable multivibrator for quite a while.

    My CBA II has a 100 mA minimum test current, which is far higher than the 15-ish mA drawn by the Arduino Pro Mini / Nano and SK6812 LEDs in a vacuum tube light, so these tests should provide a lower bound on the expected run time:

    Defunct NP-BX1 for Blinkies and Glowies - AmpHr - 2019-01
    Defunct NP-BX1 for Blinkies and Glowies – AmpHr – 2019-01

    The two dotted lines show a “good” battery (Wasabi 2017 K) tested at 100 mA has a 1 A·h capacity similar to the “defunct” batteries. Testing at 1 A drops the capacity by a factor of two and eliminates the relatively constant voltage part of its discharge curve.

    Handwaving: a 15 mA load on a battery with 1 A·hr capacity should run for 66 hours, ignoring nuances like the Arduino’s minimum voltage requirement and LED minimum forward voltages.

    A few days of informal (“Oh, it stopped a while ago”) testing showed 50 hour run times, with little difference in the results for batteries with 800 mA·h and 1300 mA·h capacity:

    Arduino Pro Mini - NP-BX1 cell - SK6812 - blue phase
    Arduino Pro Mini – NP-BX1 cell – SK6812 – blue phase

    The red power LED remains on long after the SK6812 LEDs dim out and the Arduino stops running. The blue and green LEDs fade before the red LED.

    The run time test data:

    Arduino Pro Mini - NP-BX1 run times - single SK6812 - 2019-01
    Arduino Pro Mini – NP-BX1 run times – single SK6812 – 2019-01

    The 100 mA graph plotted against watt·hours has a similar shape:

    Defunct NP-BX1 for Blinkies and Glowies - 2019-01
    Defunct NP-BX1 for Blinkies and Glowies – 2019-01

    You’d use those results for a constant power load similar to a camera or, basically, any electronics with a boost supply.

  • Ice Jewelry

    We spotted this assortment of jewelry gleaming along Clove Creek:

    Ice jewelry - overview
    Ice jewelry – overview

    A closer look at a necklace:

    Ice jewelry - detail 1
    Ice jewelry – detail 1

    And the brooch:

    Ice jewelry - detail 2
    Ice jewelry – detail 2

    The water level has been dropping for several days as the air temperature went from tolerably cold to well below freezing.

    It’s better in person; I couldn’t get close enough to avoid using the Pixel’s digital zoom, so the images have more gritty texture than you’d expect.