Electronics Design

D44C9 transistor

I don't suppose anybody has any? It's for a computer museum. John Larkin Highland Tech Glen Canyon Design Center Lunatic...

5 comments posted 8mos

posted by jl

5 comments posted 8mos posted by jl

RF tools

https://www.microwavejournal.com/topics/3909-design-tools John Larkin Highland Tech Glen Canyon Design Center Lunatic Fr...

1 comments posted 8mos

posted by jl

1 comments posted 8mos posted by jl

Useful toy

This was of some invaluable use to me, today: No idea what its total capabilities are (and no idea to learn about the t...

1 comments posted 8mos

posted by blockedofcourse

1 comments posted 8mos posted by blockedofcourse

"Imaging" the sky

Particularly, cloud cover. How can I quantify the extent and "density" (opacity) of cloud cover? And, to make it even mo...

9 comments posted 8mos

posted by blockedofcourse

9 comments posted 8mos posted by blockedofcourse

Source for 0.635 mm Pitch Twisted Pair Flat ribbon needed

Hello, the usual suspects (Digikey, Mouser, Farnell, etc) and a lot of web browsing did not bring up an accessible sour...

12 comments posted 9mos

posted by bon

12 comments posted 9mos posted by bon

Reply to Bill Sloman's post at 11:41 PM in "coil impedance".

Due to a "Header too long" message while trying to reply to Bill Sloman's post at 11:41 PM in "coil impedance". Here is...

14 comments posted 9mos

posted by invalid

14 comments posted 9mos posted by invalid

the well-dressed engineer

The 1960's HP engineer skinny tie look is back! https://seekatesew.com/wp-content/uploads/2012/03/patternandtutorial-1....

10 comments posted 9mos

posted by jl

10 comments posted 9mos posted by jl

Re: A 500 million year old brain 'radar' still shapes how you see

On Sun, 09 Nov 2025 06:07:43 GMT, Jan Panteltje snipped-for-privacy@comet.invalid wrote: >A 500-million-year-old brain...

4 comments posted 9mos

posted by jl

4 comments posted 9mos posted by jl

Re: MIT quantum breakthrough edges toward room temperature superconductors

> MIT quantum breakthrough edges toward room-temp superconductors > MIT’s new graphene experiment reveals a strange V-s...

1 comments posted 9mos

posted by bill.sloman

1 comments posted 9mos posted by bill.sloman

Artificial neurons that behave like real brain cells

Artificial neurons that behave like real brain cells Artificial neurons that think like real brains could unlock the ne...

2 comments posted 9mos

posted by alien

2 comments posted 9mos posted by alien

50,000 amp current sensor

https://www.digikey.com/en/products/detail/aim-dynamics/ASR-400MV-11-B/13923893 Thing I'm looking at now has about 8K c...

7 comments posted 9mos

posted by jl

7 comments posted 9mos posted by jl

redundancy

This web page has the "power pole" thing four times. https://www.eetimes.com/ That's the trend: when you don't have muc...

0 comments posted 9mos

posted by jl

0 comments posted 9mos posted by jl

coil impedance

In an coil with inductance and a distributed capacitance — neglecting resistance for the moment — do the inductance and...

204 comments posted 9mos

posted by christopher

204 comments posted 9mos posted by christopher

MEMS relays still suck

https://www.digikey.com/en/products/detail/menlo-microsystems-inc/MM5120-01NDB-TR/25571689 Expensive and fragile. John L...

17 comments posted 9mos

posted by jl

17 comments posted 9mos posted by jl

engineering is hard

https://www.youtube.com/watch?v=mJbE-CukPsU with 4,203 comments. John Larkin Highland Tech Glen Canyon Design Center Lun...

63 comments posted 9mos

posted by jl

63 comments posted 9mos posted by jl