Jeff Keyzer
@mightyohm.bsky.social
Electrical Engineer. W6OHM. Maker of the MightyOhm Geiger Counter and other electronics kits. Co-author of Soldering is Easy! Ex-Valve (Steam Controller, Steam Machines, Steam Deck). No longer on Twitter.
Reposted by Jeff Keyzer
Ooh, look what came in the mail! #projects #electronics
September 27, 2025 at 8:25 PM
Ooh, look what came in the mail! #projects #electronics
Reposted by Jeff Keyzer
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
AVR HV Rescue Shield Sale – 25% off at Amazon while supplies last: https://wp.me/pioCd-4cc
September 23, 2025 at 4:00 AM
AVR HV Rescue Shield Sale – 25% off at Amazon while supplies last: https://wp.me/pioCd-4cc
Anyone looking for a moderator? ☢️
www.govdeals.com/en/asset/650...
www.govdeals.com/en/asset/650...
July 2, 2025 at 3:32 PM
Anyone looking for a moderator? ☢️
www.govdeals.com/en/asset/650...
www.govdeals.com/en/asset/650...
Teardown 2025: Useful Tools for Your Electronics Workshop: https://wp.me/pioCd-4bJ
June 25, 2025 at 5:31 PM
Teardown 2025: Useful Tools for Your Electronics Workshop: https://wp.me/pioCd-4bJ
MightyOhm AVR HV Rescue Shield Kits are on sale this week! Sale ends Sunday. www.amazon.com/MightyOhm-AV...
AVR HV Rescue Shield
The MightyOhm AVR HV Rescue Shield is a high voltage fuse programmer for Atmel AVR microcontrollers.
www.amazon.com
May 28, 2025 at 6:10 PM
MightyOhm AVR HV Rescue Shield Kits are on sale this week! Sale ends Sunday. www.amazon.com/MightyOhm-AV...
Working on something different today. One jump ring broke off of this stained glass (not mine) and while I was tempted to try and repair it with rosin core solder I decided to get the proper solid core solder and acid? flux.
April 4, 2025 at 5:39 PM
Working on something different today. One jump ring broke off of this stained glass (not mine) and while I was tempted to try and repair it with rosin core solder I decided to get the proper solid core solder and acid? flux.
Stained glass folks. Why is solid core solder for stained glass absurdly large diameter? 3mm or 1/8" seems to be the standard.
April 4, 2025 at 5:35 PM
Stained glass folks. Why is solid core solder for stained glass absurdly large diameter? 3mm or 1/8" seems to be the standard.
RIP Chris Knight 😢 #realgenius #valkilmer
April 2, 2025 at 5:10 AM
RIP Chris Knight 😢 #realgenius #valkilmer
Check out this fondue set by Swiss Toolmaker PB Swiss. I feel like every major tool company has a couple items like this.
March 27, 2025 at 6:20 PM
Check out this fondue set by Swiss Toolmaker PB Swiss. I feel like every major tool company has a couple items like this.
Why don't modern CAT6 keystones have strain relief for the cable? Is this style of keystone considered acceptable for enterprise networking? Who makes enterprise-grade keystones? This one is from Cable Matters. For years Monoprice keystones had a zip tie but newer version doesn't.
March 25, 2025 at 10:51 PM
Why don't modern CAT6 keystones have strain relief for the cable? Is this style of keystone considered acceptable for enterprise networking? Who makes enterprise-grade keystones? This one is from Cable Matters. For years Monoprice keystones had a zip tie but newer version doesn't.
I wrote this 24 years ago, on my birthday. wavelen.com/pics/hd/inde...
How to Repartition Your Hard Drive
wavelen.com
March 13, 2025 at 5:06 PM
I wrote this 24 years ago, on my birthday. wavelen.com/pics/hd/inde...
Working on something today. I've been doing a lot of recapping recently and was getting tired of Googling pdfs. mightyohm.com/wiki/referen...
reference:electronics:capacitors:electrolytic [MightyOhm Wiki]
mightyohm.com
March 12, 2025 at 8:47 PM
Working on something today. I've been doing a lot of recapping recently and was getting tired of Googling pdfs. mightyohm.com/wiki/referen...
You know how those cheap Chinese alligator clip leads have folded and crimped wires? Turns out the American ones are like that too. I'm surprised to see this instruction sheet from Mueller. Can't we get an alligator clip that has a proper double crimp for conductor + insulation?
March 12, 2025 at 8:07 AM
You know how those cheap Chinese alligator clip leads have folded and crimped wires? Turns out the American ones are like that too. I'm surprised to see this instruction sheet from Mueller. Can't we get an alligator clip that has a proper double crimp for conductor + insulation?
I find it very disappointing and surprising that there is still no officially supported in-situ upgrade path for Raspberry Pi OS. They expect you to write the new version of the OS to an SD card and copy over your config changes. Coming from Debian/Ubuntu, this is insane.
February 26, 2025 at 8:17 PM
I find it very disappointing and surprising that there is still no officially supported in-situ upgrade path for Raspberry Pi OS. They expect you to write the new version of the OS to an SD card and copy over your config changes. Coming from Debian/Ubuntu, this is insane.
I'm not a fan of PCBs with leads that are bent tightly against the PCB. Makes desoldering difficult! Sony loved this technique and used it on lots of boards. Sometimes I just cut the part off and remove the leads one by one!
February 22, 2025 at 12:59 AM
I'm not a fan of PCBs with leads that are bent tightly against the PCB. Makes desoldering difficult! Sony loved this technique and used it on lots of boards. Sometimes I just cut the part off and remove the leads one by one!
When did it become so difficult to sell used books on Amazon?
February 18, 2025 at 6:02 PM
When did it become so difficult to sell used books on Amazon?
Hey, my Geiger Counter kit is now available to order from Digikey www.digikey.com/en/products/... thanks to @adafruit.com!
www.digikey.com
February 14, 2025 at 6:02 PM
Hey, my Geiger Counter kit is now available to order from Digikey www.digikey.com/en/products/... thanks to @adafruit.com!
Is anyone looking for a firmware upgrade kit for their HP 8753D? I have just one left and due to the difficulty sourcing EPROMs I will not be making more. www.ebay.com/itm/16664817...
HP Agilent 8753D Firmware Upgrade Kit Revision 6.14 08753-60185 | eBay
This is a reproduction of HP Firmware Upgrade Kit 08753-60185. The kit includes all of the components you'll need to upgrade your 8753D series VNA to firmware version 6.14. This is the latest firmware...
www.ebay.com
February 6, 2025 at 7:31 PM
Is anyone looking for a firmware upgrade kit for their HP 8753D? I have just one left and due to the difficulty sourcing EPROMs I will not be making more. www.ebay.com/itm/16664817...
Anyone looking for Freon-TF? This is an inexpensive source. Label on the bottle confirms it is TFTCE. Look up SDS if you are unfamiliar with handling this stuff. www.ebay.com/itm/16657923...
Nortronics Tape Head Cleaner QM-102 NEW, NOS, Sealed 2oz. USA Made | eBay
NORTRONICS TAPE HEAD CLEANER. Photos represent typical idem condition. MODEL: QM-102. I have not attempted to conceal any flaws, defects or information.
www.ebay.com
January 30, 2025 at 12:26 AM
Anyone looking for Freon-TF? This is an inexpensive source. Label on the bottle confirms it is TFTCE. Look up SDS if you are unfamiliar with handling this stuff. www.ebay.com/itm/16657923...
Simichrome works amazingly well at cleaning up corroded RCA connector shells. I used a kimwipe at first but then switched to a dremel buffing wheel which quickly turned black from all the gunk that came off the connectors. I think Autosol and Flitz would work too.
January 25, 2025 at 7:29 AM
Simichrome works amazingly well at cleaning up corroded RCA connector shells. I used a kimwipe at first but then switched to a dremel buffing wheel which quickly turned black from all the gunk that came off the connectors. I think Autosol and Flitz would work too.
My corner of Seattle still has an AT&T long lines tower. It's a prominent local landmark but I suspect most folks have no idea why it's there. One of the horns is still in use, which is very rare. #seattle #longlines
January 25, 2025 at 7:22 AM
My corner of Seattle still has an AT&T long lines tower. It's a prominent local landmark but I suspect most folks have no idea why it's there. One of the horns is still in use, which is very rare. #seattle #longlines
Has anyone found a good replacement for the Ikea Jansjo task lights? They are no longer available and I have several of them that flicker randomly.
December 20, 2024 at 8:32 PM
Has anyone found a good replacement for the Ikea Jansjo task lights? They are no longer available and I have several of them that flicker randomly.
A plea from a DMM manufacturer.
December 11, 2024 at 2:23 AM
A plea from a DMM manufacturer.
