Electronics Design

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TPS54302 again

TPS54302 is a wonderful little synchronous switcher chip. 3 amp switcher in SOT-23, under a dollar. It does radical spr...
3 comments posted 4yrs
posted by jlarkin
3 comments posted 4yrs posted by jlarkin

fans in series

Has anyone run bldc fans in series? I want to run three 12v fans from a 48v supply, with a resistor or something in ser...
33 comments posted 4yrs
posted by jlarkin
33 comments posted 4yrs posted by jlarkin

Volume bar of windows should be vertically longer.

Humans according to decibel scale can hear a wide spectrum of volumes. I found the windows volume bar lacking in this r...
3 comments posted 4yrs
posted by skybuck2000
3 comments posted 4yrs posted by skybuck2000

Lyin' Biden sets two NEW RECORDS!!

...but they are NOT the kind of records you want to set. First, inflation is at its highest in nearly FOUR DECADES, SEV...
27 comments posted 4yrs
posted by soar2morrow
27 comments posted 4yrs posted by soar2morrow

USB Superspeed Cables

I'm looking for good quality USB cables for superspeed devices. It didn't register with me that there would be a differ...
30 comments posted 4yrs
posted by gnuarm.deletethisbit
30 comments posted 4yrs posted by gnuarm.deletethisbit

OT: Chaos can be predictable.

Today's Proceeding of the (US) National Academy of Sciences starts with a commentary that John Larkin - weather is chao...
0 comments posted 4yrs
posted by bill.sloman
0 comments posted 4yrs posted by bill.sloman

AMD shafting DIY market again.

First they shaft the DIY market with threadripper. And now they do it again with: Ryzen 9 5900 and Ryzen 7 5800 Two non...
28 comments posted 4yrs
posted by skybuck2000
28 comments posted 4yrs posted by skybuck2000

high-side current sensor

We'll have a 48 volt, 20 amp power supply that feeds eight plug-in modular load boards. We want to measure all 9 curren...
73 comments posted 4yrs
posted by jlarkin
73 comments posted 4yrs posted by jlarkin

Aluminium vs. Copper Wire

I got some Aluminium wire by mistake. It's difficult to solder. Perhaps it's made for crimp connectors. In the long run,...
13 comments posted 4yrs
posted by edward.ming.lee
13 comments posted 4yrs posted by edward.ming.lee

Piezo sounder failing after a few years

I have a wireless doorbell with five mains-powered sounders. The sounder has four volume settings selected by repeatedl...
13 comments posted 4yrs
posted by pamela.private.mailbox
13 comments posted 4yrs posted by pamela.private.mailbox

IR phototransistor reciever

Hi all I have played around with IR beams, and I wonder how to receive the signal. I just want to know whether my beam...
15 comments posted 4yrs
posted by sonnic...
15 comments posted 4yrs posted by sonnic...

Why apps?

For years, interaction with the internet worked through a universal browser. Lately, every service, gadget or whatnot w...
42 comments posted 4yrs
posted by jeroen
42 comments posted 4yrs posted by jeroen

Electronic Tweezers

Hi, DVM, LCR meter, sig gen plus SMD tweezers. cannot vouch for practicality, but sure is cute as hell: https://www.yout...
15 comments posted 4yrs
posted by pallison49
15 comments posted 4yrs posted by pallison49