#hackoftheday — Public Fediverse posts

#HackOfTheDay use a soldering pick and a file card to recondition heat exchanger fins.

ETA: I’d straightened the worst of it before I thought to take a photo

#HackOfTheDay snag dead printers from e-waste or #FestivalOfDiscardia and recover the stainless steel rollers. The machined shafts and rubber rollers are great for all kinds of tool handles.

#HackOfTheDay 'cyme' (cargo install cyme, it's a rust program) is a smarter colour-enabled descendent of 'lsusb' which lists the usb devices on your computer. On linux I habitually run 'sudo dmesg -w' when working with USB devices to see the system log of device connects and disconnects. On Mac it's a pain to get the same. So I wrote this oneliner that shows the most recently attached or removed USB device.

```
rm usb-was ; touch usb-was ; while : ; do now=`date`; cyme -t | sed -e '/T2Bus /,$d' >usb-now ; diff usb-was usb-now >/dev/null ; if [ $? -ne 0 ] ; then clear ; cat usb-now ; echo "$now CHANGE:" ; diff usb-was usb-now ; cp usb-now usb-was ; else echo -n "$now \r" ; fi ; sleep 1 ; done
```

#HackOfTheDay With the latest betas of OpenSCAD and BambuStudio it *is* possible to produce a coloured design in OpenSCAD, and import that file into BambuStudio in one operation, without needing to futz about with separate models per colour!

See an explanation on this Thingiverse upload: https://www.thingiverse.com/thing:7376189

#ToolOfTheDay or is it #HackOfTheDay. You have a brradboarded mashup and you want to add a logic probe or injector bit it’s already really skeevy. Make up some du-pont replicator adaptors which give you extra pins to attach grounds and probes.

@MarketForcesA And as a result, Spain is allowed through the Strait of Hormuz.

#iran #iranwar #hackoftheday

#HackOfTheDay I bet you have at least one cordless power tool with a dead battery. Cut it off at the pelvis, wire it for sound, and make a bench tool. Here an ancient cordless angle grinder becomes a diamond drill-bit sharpener.

#HackOfTheDay: Friend of the Lab (I'm typing on his hand-me-down macbook pro!) Donald dropped by today with a problem dear to my heart. When speaking to an audience he struggles with time, going into terror induced tunnel vision. His idea: put an LED bar graph on top of his laptop screen where he CANNOT fail to see it.

Donald is a laser whiz and had already lasercut a bargraph holder that slots onto his laptop screen. With an ESP32 development board from the Wall o' Parts™️, and a knob/screen combo board he sourced from The Usual, we knocked up a micropython program which lets him set the talk duration hand have a progress display that has 50 LED pixels, that shade green, orange, yellow red as his speaking slot elapses.

I'm making one. Mine might need a hammer-servo too.

ETA: pic

#HackOfTheDay Another circuit remix. I want to compare the efficiency of a few different solar charging controllers. My go-to for power measurement is the Adafruit INA219 current sensor breakout. This has two screw terminals for current in-out, but the ground connection is on the other side of the board, and does not have a screw terminal. But there's a ground plane, so when Lady Ada doesn't give you a through hole, you make your own. 🧵

#HackOfTheDay is free-form circuit remixing. I’m installing some Meshtastic devices which use LoRa radio (low power long range wireless). I want to use solar power but need to know how much energy I use. To do this i’ll install an electric current sensor between the battery and the device. But this device has the battery soldered directly to the circuit board, I need to get creative. 🧵