George Smart, M1GEO
@m1geo.com
Doctor of Electronic Engineering. Staff Hardware Engineer at Arm Ltd. Schematics, PCBs, FPGAs, embedded SW. Linux. HamRadio. @UCL EE alumnus. See https://www.m1geo.com/links/
January 24, 2026 at 1:48 AM
Loading coil for 30m (V3) seems to be good! 👌 Design to be updated on website tomorrow!
January 19, 2026 at 1:01 AM
Loading coil for 30m (V3) seems to be good! 👌 Design to be updated on website tomorrow!
January 18, 2026 at 12:21 PM
The Google Nest 3 thermostat can be powered via the T1 and T2 connectors from a 12V supply.
With wireless disabled it uses the cable for comms back to the HomeLink but it can use wireless (as if on USB power).
At 12V, it draws 25mA standby, 90mA screen on and an extra ~20mA for radio activity.
With wireless disabled it uses the cable for comms back to the HomeLink but it can use wireless (as if on USB power).
At 12V, it draws 25mA standby, 90mA screen on and an extra ~20mA for radio activity.
December 31, 2025 at 11:38 PM
The Google Nest 3 thermostat can be powered via the T1 and T2 connectors from a 12V supply.
With wireless disabled it uses the cable for comms back to the HomeLink but it can use wireless (as if on USB power).
At 12V, it draws 25mA standby, 90mA screen on and an extra ~20mA for radio activity.
With wireless disabled it uses the cable for comms back to the HomeLink but it can use wireless (as if on USB power).
At 12V, it draws 25mA standby, 90mA screen on and an extra ~20mA for radio activity.
Modes like FT4 and FT8 must be like a licence to print money for the more rare DXCC stations. Set WSJT-Z to auto CQ, make a drink, return to $50 USD 😂 I need to move.
Anywho. Onwards and upwards; see if I can work another AP2 station for the DXCC.
#hamradio
Anywho. Onwards and upwards; see if I can work another AP2 station for the DXCC.
#hamradio
November 10, 2025 at 1:57 AM
Modes like FT4 and FT8 must be like a licence to print money for the more rare DXCC stations. Set WSJT-Z to auto CQ, make a drink, return to $50 USD 😂 I need to move.
Anywho. Onwards and upwards; see if I can work another AP2 station for the DXCC.
#hamradio
Anywho. Onwards and upwards; see if I can work another AP2 station for the DXCC.
#hamradio
Oh now I want one of these :)
October 29, 2025 at 11:00 PM
Oh now I want one of these :)
Activated #SOTA G/SE-008 and G/SE-012 on the Isle of Wight this morning with M0VFC and @m0wut.bsky.social - now off to do a few more in G/SE to complete the region. #hamradio
October 17, 2025 at 1:28 PM
Activated #SOTA G/SE-008 and G/SE-012 on the Isle of Wight this morning with M0VFC and @m0wut.bsky.social - now off to do a few more in G/SE to complete the region. #hamradio
Oh, RSGB! ... "Save £4.00 vs on the door price by buying online" then charges "£3.00" as an online administration fee.
#hamr #rsgbconvention
#hamr #rsgbconvention
September 30, 2025 at 10:03 AM
Oh, RSGB! ... "Save £4.00 vs on the door price by buying online" then charges "£3.00" as an online administration fee.
#hamr #rsgbconvention
#hamr #rsgbconvention
Does anyone have a recommendation for a simple GPS track recorder?
I'm after a battery powered device that records GPX files (or similar) from a GPS module to an SD card. No cellular, etc, just simple local recording.
Ideally a commercial product, not a bare PCB.
Thanks!
I'm after a battery powered device that records GPX files (or similar) from a GPS module to an SD card. No cellular, etc, just simple local recording.
Ideally a commercial product, not a bare PCB.
Thanks!
September 24, 2025 at 12:06 AM
Does anyone have a recommendation for a simple GPS track recorder?
I'm after a battery powered device that records GPX files (or similar) from a GPS module to an SD card. No cellular, etc, just simple local recording.
Ideally a commercial product, not a bare PCB.
Thanks!
I'm after a battery powered device that records GPX files (or similar) from a GPS module to an SD card. No cellular, etc, just simple local recording.
Ideally a commercial product, not a bare PCB.
Thanks!
Well, the first bug on the KX3 is fixed - no more ERR IOB - swapped out the IO expander B device after the thermal camera showed it getting hot for no reason. Came out fairly cleanly!
Next job to check the RX path and update the firmware. #hamradio
bsky.app/profile/m1ge...
Next job to check the RX path and update the firmware. #hamradio
bsky.app/profile/m1ge...
September 22, 2025 at 10:07 PM
Well, the first bug on the KX3 is fixed - no more ERR IOB - swapped out the IO expander B device after the thermal camera showed it getting hot for no reason. Came out fairly cleanly!
Next job to check the RX path and update the firmware. #hamradio
bsky.app/profile/m1ge...
Next job to check the RX path and update the firmware. #hamradio
bsky.app/profile/m1ge...
Next job, fix this on a friend's Elecraft KX3 (and then sneak a SOTA activation in with it, you know, as a test!?)
Looks to be related to the RF I/O board B. The radio is also deaf as a post, but seems to TX okay. Hmm.
#hamradio
Looks to be related to the RF I/O board B. The radio is also deaf as a post, but seems to TX okay. Hmm.
#hamradio
September 16, 2025 at 11:58 PM
Next job, fix this on a friend's Elecraft KX3 (and then sneak a SOTA activation in with it, you know, as a test!?)
Looks to be related to the RF I/O board B. The radio is also deaf as a post, but seems to TX okay. Hmm.
#hamradio
Looks to be related to the RF I/O board B. The radio is also deaf as a post, but seems to TX okay. Hmm.
#hamradio
Finally got around to sorting out the ADIFs and logs from various portable jaunts around Europe over the past few months. Just need to get my EA8/M1GEO/P certificate (I missed requesting it previously)
Quite a few nice confirmations, too.
Quite a few nice confirmations, too.
September 16, 2025 at 10:42 PM
Finally got around to sorting out the ADIFs and logs from various portable jaunts around Europe over the past few months. Just need to get my EA8/M1GEO/P certificate (I missed requesting it previously)
Quite a few nice confirmations, too.
Quite a few nice confirmations, too.
@timkirby.bsky.social thanks for the QSO earlier on 40m CW, Tim.
September 13, 2025 at 6:43 PM
@timkirby.bsky.social thanks for the QSO earlier on 40m CW, Tim.
@m0vse.bsky.social - really enjoy using wfview, but I cannot use it at work due to it being unsigned.
Have you considered using something like signpath.org to sign the Windows binaries? That would be awesome!
Have you considered using something like signpath.org to sign the Windows binaries? That would be awesome!
SignPath Foundation
https://signpath.org
signpath.org
September 10, 2025 at 4:36 PM
@m0vse.bsky.social - really enjoy using wfview, but I cannot use it at work due to it being unsigned.
Have you considered using something like signpath.org to sign the Windows binaries? That would be awesome!
Have you considered using something like signpath.org to sign the Windows binaries? That would be awesome!
September 3, 2025 at 6:03 PM