John T (the GRA is silent)
@grajohnt.bsky.social
Vibe Personality Hire
Geology PhD, maker of absurd things, radio, and other nonsense. Always interested in how we learn through failure. Also at grajohnt
@chaos.social
Geology PhD, maker of absurd things, radio, and other nonsense. Always interested in how we learn through failure. Also at grajohnt
@chaos.social
I'm listing my MK3S for sale with a heavy heart. It has served me well, though!
November 13, 2025 at 6:08 PM
I'm listing my MK3S for sale with a heavy heart. It has served me well, though!
Finally got some denser RGB LED strips in, and while I'm not sure they're brighter, they're more fun.
Still more experimenting to do!
Still more experimenting to do!
November 12, 2025 at 1:03 AM
Finally got some denser RGB LED strips in, and while I'm not sure they're brighter, they're more fun.
Still more experimenting to do!
Still more experimenting to do!
How long have I been #TeamRyobi ?
This long.
This long.
November 10, 2025 at 11:51 PM
How long have I been #TeamRyobi ?
This long.
This long.
November 9, 2025 at 5:27 PM
Now we're getting somewhere...
November 8, 2025 at 8:34 PM
Now we're getting somewhere...
Since only the 'skin' on the outside is opaque, I figured out that if you take a diamond burr to it, you can strip it off and light it from the outside. This is getting closer to what I want.
I'm going to need some brighter LED strips.
I'm going to need some brighter LED strips.
November 8, 2025 at 5:39 PM
Since only the 'skin' on the outside is opaque, I figured out that if you take a diamond burr to it, you can strip it off and light it from the outside. This is getting closer to what I want.
I'm going to need some brighter LED strips.
I'm going to need some brighter LED strips.
Lighting it from the middle is neat, but not great in the infinity mirror setup. (Also, I promise it looks better in pictures than it does in reality!)
November 8, 2025 at 2:52 PM
Lighting it from the middle is neat, but not great in the infinity mirror setup. (Also, I promise it looks better in pictures than it does in reality!)
Still trying different things - haven't landed on something that really works yet.
November 8, 2025 at 2:01 PM
Still trying different things - haven't landed on something that really works yet.
That's definitely going to need to be brighter - it's also hard to take a video of!
November 8, 2025 at 12:24 AM
That's definitely going to need to be brighter - it's also hard to take a video of!
Proof-of-concept of a thing that's been in my head for years. Maybe more to come?
November 7, 2025 at 11:20 PM
Proof-of-concept of a thing that's been in my head for years. Maybe more to come?
'tis the season of:
"What kind of clothes should I pack?"
"Yes."
"What kind of clothes should I pack?"
"Yes."
November 7, 2025 at 2:25 PM
'tis the season of:
"What kind of clothes should I pack?"
"Yes."
"What kind of clothes should I pack?"
"Yes."
Flash your badge and get a free drink, medical issue, or cookie!
November 6, 2025 at 8:49 PM
Flash your badge and get a free drink, medical issue, or cookie!
One of the more ludicrous (but delightful) boards I was given at #Supercon was this one - the CapKey. It's a capacitive-touch keyboard the size of a keycap.
Would tag the maker, but can't seem to find him!
Would tag the maker, but can't seem to find him!
November 6, 2025 at 3:16 PM
One of the more ludicrous (but delightful) boards I was given at #Supercon was this one - the CapKey. It's a capacitive-touch keyboard the size of a keycap.
Would tag the maker, but can't seem to find him!
Would tag the maker, but can't seem to find him!
November 4, 2025 at 2:45 PM
November 2, 2025 at 4:17 PM
Almost ready for @hackaday-feed.bsky.social #supercon!
October 28, 2025 at 6:30 PM
Almost ready for @hackaday-feed.bsky.social #supercon!
Will I be able to cram this all into a box and integrate it before @hackadayofficial.bsky.social #supercon?
Maybe!
Maybe!
October 12, 2025 at 5:46 PM
Will I be able to cram this all into a box and integrate it before @hackadayofficial.bsky.social #supercon?
Maybe!
Maybe!
A little #RaspberryPiPico project with a DAC for sound effects, some lights, and a PIR for motion sensing.
Should be "fun" for the trick-or-treaters on #halloween!
Should be "fun" for the trick-or-treaters on #halloween!
October 9, 2025 at 8:28 PM
A little #RaspberryPiPico project with a DAC for sound effects, some lights, and a PIR for motion sensing.
Should be "fun" for the trick-or-treaters on #halloween!
Should be "fun" for the trick-or-treaters on #halloween!
This is mostly a thought experiment, and LEDs have long been used as useful indicators in oscillator circuits, but LED noodles can be a useful tool to help "see" what's happening in a circuit.
October 8, 2025 at 12:45 PM
This is mostly a thought experiment, and LEDs have long been used as useful indicators in oscillator circuits, but LED noodles can be a useful tool to help "see" what's happening in a circuit.
Finally getting the #halloween decor sorted...
October 8, 2025 at 11:53 AM
Finally getting the #halloween decor sorted...
Heads up for any #Google #Pixel9Pro and potentially other #Android users. The Android 16 update seems to have fundamentally broken the ability for the GPS to get a lock in many situations.
Comparison between my ~20 yr old eTrex and my #P9P today - both with same view of the sky.
Comparison between my ~20 yr old eTrex and my #P9P today - both with same view of the sky.
September 30, 2025 at 2:08 AM
Heads up for any #Google #Pixel9Pro and potentially other #Android users. The Android 16 update seems to have fundamentally broken the ability for the GPS to get a lock in many situations.
Comparison between my ~20 yr old eTrex and my #P9P today - both with same view of the sky.
Comparison between my ~20 yr old eTrex and my #P9P today - both with same view of the sky.
Cue "dumb ways to die" music. Maybe that's not the vehicle to tailgate, buddy.
September 19, 2025 at 5:59 AM
Cue "dumb ways to die" music. Maybe that's not the vehicle to tailgate, buddy.
Currently being stalked in the cutest way possible (Hopi Chipmunk)
September 5, 2025 at 12:30 AM
Currently being stalked in the cutest way possible (Hopi Chipmunk)