Electronics Design

Noisy NPN SOT-23 reverse breakdown BE junction (Audio)

Is there any particular transistor type that is likely to have a lot of reasonably white noise output over the audio ra...

35 comments posted 5yrs

posted by speffSNIP

35 comments posted 5yrs posted by speffSNIP

OT - Washington Post now gives permission to take a look at origins of virus.

Now, 1 year later the Washington Post seems interested in where the virus s tarted. For those curious souls who suggest...

77 comments posted 5yrs

posted by blocher

77 comments posted 5yrs posted by blocher

JWST finally going to get put up?

What booster and from where are we going to launch it? This does not give that answer but maybe Larkin will learn why m...

0 comments posted 5yrs

posted by DecadentLinuxUserNumeroUno

0 comments posted 5yrs posted by DecadentLinuxUserNumeroUno

replacing 2 D cells with 18650 batteries

I have a couple of pro radiation meters (Ludlum 12) that run on a pair of D cells outputting 3V. Since I have a bunch o...

26 comments posted 5yrs

posted by ws194

26 comments posted 5yrs posted by ws194

Ferrite grinding

Hi I need to grind a ferrite E core, may be both center legs or outer legs I need a diamond grinding tool I will be usi...

24 comments posted 5yrs

posted by klauskvik

24 comments posted 5yrs posted by klauskvik

BF862 die shot

Some eye candy for Phil :^) https://zeptobars.com/en/read/BF862-low-noise-N-Channel-JFET-J-FET-AM-preamp-2Ap Tim -- Sev...

2 comments posted 5yrs

posted by tiwill

2 comments posted 5yrs posted by tiwill

led hack Satco 62928.

So I bought a few of these shop 4' led lamps from the local hardware store. Satco 62-928. I find they are a bit bright,...

1 comments posted 5yrs

posted by ggherold

1 comments posted 5yrs posted by ggherold

Dropbox pita or is it me?

I uploaded some pics to dropbox, so I could post 'em here. How the bleep do I make a link to a picture in dropbox? Georg...

4 comments posted 5yrs

posted by ggherold

4 comments posted 5yrs posted by ggherold

Human Bias Is Everywhere in Tech

A new thrust originating at Stanford to revamp computer science education:...

30 comments posted 5yrs

posted by bloggs.fredbloggs.fred

30 comments posted 5yrs posted by bloggs.fredbloggs.fred

Theory and servicing of AM, FM, and FM Stereo Receivers - which edition?

Some time ago in this group (I think), these two books were cited as being good references. I am trying to confirm that...

0 comments posted 5yrs

posted by jjhudak4

0 comments posted 5yrs posted by jjhudak4

Looking for a XYZ ARINC407 syncho explanation in simple terms

I have read a lot about this subject and can see how it works. Most of the material is 50+ years old and it is really m...

79 comments posted 5yrs

posted by nospam

79 comments posted 5yrs posted by nospam

How insert SD card..

..in Samsung Galaxy J2? I see what seems to be a slot beneath the SIM card but the SD card does not go into the slot. A...

3 comments posted 5yrs

posted by robertbaer

3 comments posted 5yrs posted by robertbaer

fluke 54 II thermometer IR port?

Has anybody ever used the IR transfer function on a Fluke 54 II thermometer? I can't locate any inforation on where the...

3 comments posted 5yrs

posted by presence

3 comments posted 5yrs posted by presence

Fast?

I fancied goofing around with time delay reflectometry and picked up this little generator for 56 quid. Maker claims it...

14 comments posted 5yrs

posted by cd

14 comments posted 5yrs posted by cd

Do I need a 300 GHz scope mow?? ;-)

Pushed to the limit: A CMOS-based transceiver for beyond 5G applications at 300 GHz https://www.sciencedaily.com/releas...

25 comments posted 5yrs

posted by pNaOnStPeAlMtje

25 comments posted 5yrs posted by pNaOnStPeAlMtje