Roger Cheng

Making, tinkering, and sharing my adventures along the way. Migrating to Mastodon @[email protected]

[Roger Cheng @Regorlas]

Post an image of yourself as the final boss without downloading new pics.
https://t.co/Gx5lHSIc3V

[Dennis Wingo @wingod]

This should win science cartoon of the year award!

[Headquarters @HQNewsNow]

We approve this message

[The Onion @TheOnion]

On This Day In History: July 20, 1969

[Roger Cheng @Regorlas]

@MLE_Online Grab a megaphone, stand at a busy street corner, and yell at everyone to free themselves. Between the foil and the dripping dye it should be interesting...

[Roger Cheng @Regorlas]

@jarkman @MLE_Online (2) I assume everyone is capable of recognizing physical dangers (sharp edges) but beginners might need help with dangers not physically visible. Examples: Discharge high voltage capacitors. Remove pouch batteries so they are not punctured.

[Roger Cheng @Regorlas]

@jarkman @MLE_Online (1) If someone brought in their own thing to be repaired (and not just torn apart) the organizers need to somehow make that clear to other participants. We don't want their thing to be accidentally destroyed.

[Make: @make]

TODAY!!! December 15th, come #HangoutAndNerdout with @IShJR and our lovely friends @glowascii and @ZengJinger from @Hacksterio as we nerd out about #space with amazing guests @JoanHorvath, @Regorlas, and @hiteak! 🤘🧑‍🚀🤘

https://t.co/x3oVxi7mzY

[Roger Cheng @Regorlas]

Counting from rollout of the first 747 in 1968, that's ~54 years of building 747s.

For perspective, a reminder that 1968 was only ~65 years after Wright Brothers' first flight.

A great run considering it was originally expected to be quickly overshadowed by supersonic aircraft.

[Boeing Airplanes @BoeingAirplanes]

There she goes!

The last 747 has left our Everett factory ahead of delivery to Atlas Air in early 2023. #QueenOfTheSkies

Photos: Boeing/Paul Weatherman

[Mosquito Capital @MosquitoCapital]

I've seen a lot of people asking "why does everyone think Twitter is doomed?"

As an SRE and sysadmin with 10+ years of industry experience, I wanted to write up a few scenarios that are real threats to the integrity of the bird site over the coming weeks.

[Roger Cheng @Regorlas]

A chaotic under-communicated layoff eliminated many of my closest colleagues and nobody we could talk to knew why. After months of management flailing at damage control I decided trust was gone forever and left.

Some at Twitter will hold out hope as I did, others won't wait.

[Roger Cheng @Regorlas]

@MLE_Online Request some pictures showing how much volume is available. Most people have a general idea of width and height of a dashboard gauge, but speaking for myself I have no idea how deep that space goes.

If it's not very deep, I guess you'd be constrained to those Sony Watchman tubes

[Roger Cheng @Regorlas]

@MLE_Online @jbg Here is my "single channel" proof of concept before Emily extended it to multiple channels. This proof of concept was in turn based on Emily's original experiment.
https://t.co/NuQgf5TVib

[Roger Cheng @Regorlas]

@RueNahcMohr Yeah, the cheap 24V DC wall wart off Amazon was super noisy (factory PSU was lost) and propagated through the system.

[Roger Cheng @Regorlas]

Exploring the guts of a dead Form 1+ laser resin printer. Looks like galvanometer commands are analog voltage level: oscilloscope plot on XY mode resembles laser beam path.

[Roger Cheng @Regorlas]

@GeekMomProjects Wow looks great! (Especially love the googly eye addon.)

[Roger Cheng @Regorlas]

@GeekMomProjects Once the lid is secured, would you be willing to run my Glow Flow pattern? I'd love to see how it looks.

[Roger Cheng @Regorlas]

(Disclaimer: These effects are less flicker-y in real life than what's visible in these clips. It's a very challenging thing for me to record on video!)

[Roger Cheng @Regorlas]

Some cooling fans have a speed-reporting wire. Briefly flashing LEDs based on that tachometer signal creates a strobe light.

[Roger Cheng @Regorlas]

If a delay is added between tachometer pulse and LED illumination, the visual shifts to a different location. Varying this delay over time can "rotate" the image at any speed independent of actual fan rotation speed, even backwards!