Purring is reportedly very complex and often misconstrued

  • February 3, 2022
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The Diary of Lupin Pooter Tygers, Tygers!
Marceline grooming Bubblegum. Marceline grooming Bubblegum. Both cats seemed content, but neither was purring. I’ve only ever heard a cat purr when being brushed or stroked (aka petted) by a human being. Certainly that’s the only circumstance under which any cat I’ve owned or cared for has purred, but the BBC says that a cat […]

Deep sockets and feeler, radius, and pin gauges

  • February 1, 2022
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HerpDerp The Diary of Lupin Pooter TØØLS Tygers, Tygers!
Wera 05004525001 Belt A Deep 1 Socket Spanner Set (1/4 Inch). Plus a 4mm deep socket purchased separately. Deep sockets are one of those tools that, every so often, I could’ve really used but managed to get along without. So I got a , Wera’s 05004525001 deep socket set (1/4-inch drive). It’s got 9 pieces, […]

Stubby bits for low-profile offset ratcheting screwdrivers

  • January 28, 2022
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HerpDerp The Diary of Lupin Pooter TØØLS
This is the bent-up-end offset ratcheting screwdriver. The Japanese company‘s name, Rubicon, is translated into Chinese as Robinhood. With a specific task in mind, I recently got a couple of low-profile, offset, ratcheting screwdrivers. The kind that accept hex-shank bits. Specifically, two Japanese Rubicon brand jobbies: RGH-9A (straight and flat) and RGH-9B (bent-up at the […]

Do Not Soak

  • November 12, 2021
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HerpDerp The Diary of Lupin Pooter
Huh. Didn’t read this label on the bottom of the mug until I’d turned it upside-down to hand-wash the base. This Fallout-themed mug had been sitting in our kitchen sink for a day or so, exposed to water to the extent that, when the tap was used, some water splashed into the basin where the […]

Don’t you wanna watch me spill? Alerting when a container is nearly full of liquid.

  • August 19, 2021
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Arduino C++ Contrivances The Diary of Lupin Pooter
There may come a time when you need to know if a container being filled with liquid that flows at a slow, variable rate is nearly full so that you can empty the contents or do something else with the stuff inside. Such a need recently arose here and I put something together using an Arduino (Cloneduino) Nano, a couple of non-contact capacitive water level sensors, a WS2812 LED breakout board, and a piezo buzzer.

Won’t fly far, fethers [sic] snipped

  • August 8, 2021
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HerpDerp Spitting Images The Diary of Lupin Pooter
Spotted this lost-pet poster for a parrot near a bus shelter early last month and, just now, stumbled across the photo I snapped of it at the time. Hope they found the bird!

Dusty, grimy, sometimes packed in trash, and occasionally short

  • July 2, 2021
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HerpDerp The Diary of Lupin Pooter
A pair of NOS gloves that I donned to protect my hands while snipping off lengths of 304 stainless steel mesh. Handling a couple of small rolls of clean-looking SS for a few minutes left them visibly filthy. Buying stuff from merchants in China directly, rather than from a retailer whose stock comes from a […]

Soldering fixture test: stainless steel mesh + silicone foam

  • June 21, 2021
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Contrivances Mucking About With Things Sodding soldering The Diary of Lupin Pooter
Here’s the setup I tried: a cut-off length of white silicone foam (with a 15mm x 20mm rectangular cross-section), a roughly square piece of stainless steel mesh, and binder clips securing the mesh against the foam. On occasion, one needs or wants to solder wires to a small and irregularly-shaped component. Last month, I tried […]

This may not have worked (reliably) even if I’d had the pin ordering correct

  • June 11, 2021
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Contrivances HerpDerp Mucking About With Things Sodding soldering The Diary of Lupin Pooter
Here’s a zoomed-in image of my attempt to connect to an SCD41 sensor without soldering wires onto it or cobbling together some sort of jig with pogo pins. I recently got some SCD41 sensors. They report CO2 level in PPM as well as temperature and humidity. They’re also surface-mount, of the LGA variety and small […]

Calibration slides: a boon for measuring small things like the dimensions of solder pads on surface mount components

  • May 28, 2021
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Contrivances HerpDerp Mucking About With Things Sodding soldering TØØLS
One of the calibration slides, with the 1-mm-per-division scale above a new surface-mount CO2 sensor from Sensirion. I hadn’t aligned the start of the scale with the left side of the sensor yet, but it’s 1 centimeter (10mm) square. The trend seems to be that the share of interesting new thingamajigs and doodads available only […]

Hits and a miss, sort-of fixing obliterated solder pads on a PCB

  • May 25, 2021
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HerpDerp Mucking About With Things Sodding soldering The Diary of Lupin Pooter TØØLS
Pre-solder-enblobbening photo of my jury-rigged fix for an obliterated solder pad intended for the positive pin of a coin-cell battery holder mounted on the reverse of the PCB. In recent months, I’ve been lending a helping hand to a few people who’ve shown interest in electronics. I’m not an EE or an electronics expert of […]

Success: eliminated as non-optimal one way of soldering wires onto tiny, irregularly-shaped components

  • May 20, 2021
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HerpDerp Mucking About With Things Sodding soldering Testing TØØLS
Behold, my home workbench. The component I hoped to solder is bathed in the illumination from my microscope’s LED ring light. Tonight, I tried one very simple way of holding an itty bitty, non-flat electronics component and some wires still while I solder the stripped ends of the wires to the pads on the component: […]