Author: scruss

  • Apple IIgs: before and after graphics

    Unless you have the heavy analogue Apple CRT that was specially made for it, composite video output on the Apple IIgs is utterly dismal:

    Apple IIgs: composite to LCD display

    Adding an Apple IIgs → SCART cable through a SCART to HDMI converter is much better:

    Apple IIgs: via SCART and HDMI

    There’s still a little bit of shimmer to the background, but at least text is legible.

  • Scott Hutchison

    Thank you for the music, Scott. This is how I’ll remember you, lighting up the crowd on a warm Toronto evening:

    Frightened Rabbit at The Danforth Music Hall, May 29th 2017

    Frightened Rabbit’s Scott Hutchison: a songwriter who found humanity in our flaws

  • Peak Tree Event

    Peak Tree Event

    Peak Tree Event

    Instagram filter used: Lo-fi

    View in Instagram ⇒

  • OpenSCAD might not’ve been the best choice here

    OpenSCAD might not’ve been the best choice here

    OpenSCAD might not’ve been the best choice here

    Yup, lots of circles, intersections, differences and offsets went into this attempt at the logo of my favourite museum.

    For the determined/demented, here’s the source. It’s probably not that useful for learning OpenSCAD, as it’s written in my typical “carve away all the bits that don’t look like an elephant” style:

    // akm logo - why yes this *is* a good tool to use ...
    
    // constants for octagon maths
    r1 = 1 - sqrt(2) / 2;           // ~0.292893
    r2 = sqrt(r1);                  // ~0.541196
    x1 = (sqrt(2) - 1) / 2;         // ~0.207107
    
    sc = 100;                       // size factor
    t = 4;                          // line thickness
    bigt = 7;                       // strapwork gap thickness
    $fn = 256;                      // OpenSCAD circle smoothness
    
    module petal() {
        intersection() {
            translate([ sc * x1, sc * x1])circle(r = sc * r2);
            translate([-sc * x1, sc * x1])circle(r = sc * r2);
        }
    }
    
    module hollow_petal() {
        difference() {
            offset(r =  t / 2)petal();
            offset(r = -t / 2)petal();
        }
    }
    
    module inner_lobe() {
        difference() {
            for (i = [0:3]) {
                rotate(i * 90 + 45)offset(r = t / 2)petal();
            }
            for (i = [0:3]) {
                rotate(i * 90 + 45)offset(r = -t / 2)petal();
            }
        }
    }
    
    module ring() {
        for (i = [0:3]) {
            rotate(i * 90)difference() {
                intersection() {
                    inner_lobe();
                    union() {
                        offset(r = -bigt / 2)petal();
                        rotate(45)offset(r = t / 2)petal();
                    }
                }
                rotate(90)offset(r = bigt / 2)petal();
            }
        }
    }
    
    module logo() {
        union() {
            ring();
            for (i = [0:3]) {
                rotate(90 * i)union() {
                    intersection() {
                        hollow_petal();
                        rotate(-90)offset(r = -bigt / 2)petal();
                    }
                    difference() {
                        intersection() {
                            hollow_petal();
                            rotate(45)offset(r = -bigt / 2)petal();
                        }
                        rotate(-90)offset(r = bigt / 2)petal();
                    }
                    
                    difference() {
                        hollow_petal();
                        offset(r = bigt / 2)union() {
                            rotate(-90)petal();
                            rotate(45)petal();
                        }
                    }       
                }
            }
        }
    }
    
    logo();
    
  • Strictly for research purposes only …

    Strictly for research purposes only …

    Strictly for research purposes only …

    Instagram filter used: Lo-fi

    Photo taken at: St Clair Ice Cream LTD

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  • oh no it isn’t

    the sign says locked, the gate says not
  • ❤

    ❤

    ❤

    Instagram filter used: Lo-fi

    Photo taken at: Toronto, Ontario

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  • Flashprint except without the prints falling over

    I use a FlashForge Creator Pro 3D printer for work. It’s okay, but I wouldn’t recommend it: you have to manually level the print bed (ಠ_ಠ), you can’t print via USB, it pretends to be a knock-off MakerBot (same USB ID: naughty naughty) and its slicing software is a mishmash of GPL and other code all bundled up in one proprietary lump. It also doesn’t used g-code, which is a bit poo.

    3d print fail
    As Vik said: “The Flying Spaghetti Monster has cast forth His noodly appendage and made output in His own image.”

    I have been having endless trouble will tall prints losing adhesion, falling over, and leaving a noodly mess everywhere. I’ve fixed it by making some manual changes to the config file, the process as described here: Flashprint advanced print settings by editing the default.cfg configuration file. What I changed was:

    [brim]
    enable = true                  # valid range {true, false}, default is false # CHANGED
    extruderId = 0                  # valid range {0, 1}, default is 0
    margin = 10.0                    # valid range [1.0, 10.0], default is 5.0   # CHANGED
    layerCnt = 2                    # valid range [1, 5], default is 1           # CHANGED
    speed = 60                      # valid range [10, 200], default is 60
    excludeInterior = true         # valid range {true, false}, default is false # CHANGED

    This makes a colossal double-width, double thickness brim around the prints so that they will not topple. I’m very happy with the results so far.

    Rather than mucking about with config files, if you enable “Expert Mode” in Flashprint’s preferences:

    Then you can make a brim that stops prints coming off the print bed.

    expert brim settings = prints not fall over

    And lo, there was much rejoicing …

    23½ hour print job done! (They’re LipSync shells, btw)
  • 20 hours and 92% done …

    Instagram filter used: Lo-fi

    Photo taken at: Protolab Makerspace

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  • Eugene’s fishing line header hack for Raspberry Pi Zero

    0.38 mm / 5.4 kg test Trilene threaded through Raspberry Pi Zero header holes
    0.38 mm / 5.4 kg test Trilene threaded through Raspberry Pi Zero header holes holds jumper wires snugly without soldering

    Eugene “thirtytwoteeth” Andruszczenko (of Game Boy Zero – Handheld Edition fame) posted a neat idea to help your Raspberry Pi Zero take jumper wires without soldering. He threaded fishing line through the 40 hole header, making an interference fit for header pins. I tried it with 0.38 mm Trilene, which worked rather well.

  • A few seconds from a 12- hour print job

    A few seconds from a 12- hour print job

    A few seconds from a 12- hour print job

    Instagram filter used: Lo-fi

    View in Instagram ⇒

    … which of course failed 95% through:

    As Vik said: “The Flying Spaghetti Monster has cast forth His noodly appendage and made output in His own image.”

    You gotta brim all the time.

  • a brave wee one

    a brave wee one

    a brave wee one

    Instagram filter used: Lo-fi

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  • In the very unlikely event that you want to repair a broken handset socket on a Princess telephone …

    It seems that Princess telephones — like the one I have — were notorious for having their connectors break. The connectors are made of brittle thermoset resin, and sit just where they’d hit the ground if you dropped the phone. This is definitely what happened here:

    Very broken 616p modular handset connector. Pins are (l to r): Black, Green, White, Red

    For the handset, you want a 616P connector. If your wall connector has gone too, you’ll need the 623P connector for that. These are fairly readily available on eBay.

    These instructions really only apply to the 2702BMG model of the Princess phone. There are many variants, and the 2702BMG was one of the last Princess models made.

    1. Remove the upper body by unscrewing the two screws at each end of the base

      Undo the screws at left and right to remove the case
    2. Remove the body, and remove the keypad. This is held in by two screws, one on each side of the keypad
    3. If your phone’s anything like mine, untwist the wires inside to get the line and handset connectors separated
    4. Unhook the old connectors from the terminals, and attach the new connectors as shown:

      Handset wiring: Green → S, White & Red → R, Black → T
    5. Slot the handset modular connector into its space in the phone chassis
    6. Replace the keypad
    7. Re-route the wires so they don’t get pinched or block the handset hook, then re-attach the plastic body with the two screws.