Justin K5EM
@k5em.com
Tech, ham radio, hacking, weather. Enjoy SDR, antennas, contesting, satcom. HW/FW/SW engineer mapping with drones. He/him. http://satmatch.com also @[email protected]
Reposted by Justin K5EM
TinyGPU v2.0. A standalone GPU that can display a model file from Flash.Render 1K tri at 6.5fps in 320x240, 4-bit color. Tested on Basys3 FPGA. Submitted to the upcoming #TinyTapeout shuttle.
more spec 🧵.
git:
github.com/pongsagon/tt...
more spec 🧵.
git:
github.com/pongsagon/tt...
November 3, 2025 at 6:15 AM
TinyGPU v2.0. A standalone GPU that can display a model file from Flash.Render 1K tri at 6.5fps in 320x240, 4-bit color. Tested on Basys3 FPGA. Submitted to the upcoming #TinyTapeout shuttle.
more spec 🧵.
git:
github.com/pongsagon/tt...
more spec 🧵.
git:
github.com/pongsagon/tt...
Reposted by Justin K5EM
November 9, 2025 at 5:27 PM
Fun morning knocking out a Pasadena area favorite SOTA summit with John before the last day of SuperCon
November 5, 2025 at 4:35 AM
Fun morning knocking out a Pasadena area favorite SOTA summit with John before the last day of SuperCon
I was in Los Angeles this weekend for @hackaday-feed.bsky.social SuperCon and had the chance to meet up with some of my favorite SoCal SOTA peeps @n6ara.bsky.social and Mark KD7DTS and chat on the sofa. Don't miss the earlier episodes!
youtu.be/VBG_cy7qeCM
youtu.be/VBG_cy7qeCM
Justin K5EM - Building Community through Radiosport | Sofas on the Air Ep. 8
YouTube video by SOTA+
youtu.be
November 4, 2025 at 7:47 PM
I was in Los Angeles this weekend for @hackaday-feed.bsky.social SuperCon and had the chance to meet up with some of my favorite SoCal SOTA peeps @n6ara.bsky.social and Mark KD7DTS and chat on the sofa. Don't miss the earlier episodes!
youtu.be/VBG_cy7qeCM
youtu.be/VBG_cy7qeCM
Reposted by Justin K5EM
October 12, 2025 at 4:44 PM
Another @mightyohm.bsky.social kit in the wild
Ooh, look what came in the mail! #projects #electronics
September 27, 2025 at 8:42 PM
Another @mightyohm.bsky.social kit in the wild
Reposted by Justin K5EM
Reposted by Justin K5EM
Never seen before perspective of a tornado in Arnett, OK by our research drone on May 18th. Watch the full video here on YouTube: youtu.be/NGD2e741Riw
May 20, 2025 at 3:23 PM
Never seen before perspective of a tornado in Arnett, OK by our research drone on May 18th. Watch the full video here on YouTube: youtu.be/NGD2e741Riw
Reposted by Justin K5EM
Does anyone else find the Discover feed totally useless to discover anything? All it shows me are posts I've already read from people I already follow.
January 25, 2025 at 9:04 PM
Does anyone else find the Discover feed totally useless to discover anything? All it shows me are posts I've already read from people I already follow.
A little sun, snow, and family therapy today. Beautiful day to be in the mountains.
January 20, 2025 at 6:55 PM
A little sun, snow, and family therapy today. Beautiful day to be in the mountains.
Reposted by Justin K5EM
Bambu's firmware shenanigans are making me rethink ever recommending one again.
They have to backtrack on it, or lose the goodwill of the 3DP community that is "open source but willing to give on value sometimes", which is not an insignificant sector.
They have to backtrack on it, or lose the goodwill of the 3DP community that is "open source but willing to give on value sometimes", which is not an insignificant sector.
January 19, 2025 at 5:25 PM
Bambu's firmware shenanigans are making me rethink ever recommending one again.
They have to backtrack on it, or lose the goodwill of the 3DP community that is "open source but willing to give on value sometimes", which is not an insignificant sector.
They have to backtrack on it, or lose the goodwill of the 3DP community that is "open source but willing to give on value sometimes", which is not an insignificant sector.
Reposted by Justin K5EM
Some bald eagles near the UW this morning
January 18, 2025 at 9:29 PM
Some bald eagles near the UW this morning
Reposted by Justin K5EM
A Direct Conversion Receiver Anyone Can Build
A Direct Conversion Receiver Anyone Can Build
A couple of years ago one of the Hackaday Prize finalists was a project to take highschoolers through building a direct conversion radio receiver for the 40 metre amateur band. …read more
hackaday.com
January 16, 2025 at 3:30 AM
A Direct Conversion Receiver Anyone Can Build
Reposted by Justin K5EM
New #lidar images of the #Enchantments for the Washington Geological Survey. #PNW #Maps #CascadeRange
December 8, 2024 at 12:58 AM
New #lidar images of the #Enchantments for the Washington Geological Survey. #PNW #Maps #CascadeRange
Reposted by Justin K5EM
The first aurora of 2025 danced in the night sky last night.
January 5, 2025 at 2:58 AM
The first aurora of 2025 danced in the night sky last night.
Fippin' the breakers is the easiest way to find local RFI - or to find out it's not local. When doing so, remember to check your radio power supply too, especially if it's of the switching type. Helped a ham in the neighborhood hunting RFI for him to realize it was the radio switching power supply.
Lowering Your Noise Floor, the Easy Way
Lowering Your Noise Floor, the Easy Way
If there’s anything more annoying to an amateur radio operator than noise, we’re not sure what it could be. We’re talking about radio frequency noise, of course, the random broadband …read more
hackaday.com
December 31, 2024 at 6:09 PM
Fippin' the breakers is the easiest way to find local RFI - or to find out it's not local. When doing so, remember to check your radio power supply too, especially if it's of the switching type. Helped a ham in the neighborhood hunting RFI for him to realize it was the radio switching power supply.
Last day to order a SotaCAT for the year! Get WiFi control, click-to-tune spotting, and SotaMAT integration on your KX2/KX3. We have a few in stock still; any in-stock orders today will ship tomorrow, then we're taking the holidays off.
store.invertedlabs.com
store.invertedlabs.com
December 19, 2024 at 7:55 PM
Last day to order a SotaCAT for the year! Get WiFi control, click-to-tune spotting, and SotaMAT integration on your KX2/KX3. We have a few in stock still; any in-stock orders today will ship tomorrow, then we're taking the holidays off.
store.invertedlabs.com
store.invertedlabs.com
Reposted by Justin K5EM
single sided PCB, fully fabricated on my bench in under an hour using a fiber laser. i’m STOKED.
December 12, 2024 at 6:02 PM
single sided PCB, fully fabricated on my bench in under an hour using a fiber laser. i’m STOKED.
🎶 Christmas time is here 🎶 c/o gpt:
Receivers strain to hear
But noise is oh so near
Glowing reindeer on the lawn
Make pure reception disappear
I tune and adjust my knobs
To find that perfect tone
Yet flick’ring bulbs and singing shrubs
Turn clear bands into drone
Oh, static noise is here...
Receivers strain to hear
But noise is oh so near
Glowing reindeer on the lawn
Make pure reception disappear
I tune and adjust my knobs
To find that perfect tone
Yet flick’ring bulbs and singing shrubs
Turn clear bands into drone
Oh, static noise is here...
December 11, 2024 at 6:04 PM
🎶 Christmas time is here 🎶 c/o gpt:
Receivers strain to hear
But noise is oh so near
Glowing reindeer on the lawn
Make pure reception disappear
I tune and adjust my knobs
To find that perfect tone
Yet flick’ring bulbs and singing shrubs
Turn clear bands into drone
Oh, static noise is here...
Receivers strain to hear
But noise is oh so near
Glowing reindeer on the lawn
Make pure reception disappear
I tune and adjust my knobs
To find that perfect tone
Yet flick’ring bulbs and singing shrubs
Turn clear bands into drone
Oh, static noise is here...
For the past year or so, I've been working with @ab6d.bsky.social to turn his SotaCAT design and concept into a ready-to-buy hardware design. After a couple of pre-order rounds and testing, today I opened the web store for general SotaCAT consumption. So what is SotaCAT exactly?
December 11, 2024 at 1:42 AM
For the past year or so, I've been working with @ab6d.bsky.social to turn his SotaCAT design and concept into a ready-to-buy hardware design. After a couple of pre-order rounds and testing, today I opened the web store for general SotaCAT consumption. So what is SotaCAT exactly?
"It's 84 3/4, not 85 1/4. Oops" Every time! 😅
Second channel video: Mega Bench!
youtu.be/XPmh2vSStKg
youtu.be/XPmh2vSStKg
December 10, 2024 at 6:14 PM
"It's 84 3/4, not 85 1/4. Oops" Every time! 😅
Reposted by Justin K5EM
December 6, 2024 at 12:52 AM