Electronics Design

TVS diode in LT spice

.model SMCJ33A D(Ron=.4 Roff=8Meg Vfwd=.7 epsilon=100m Vrev=38.65 Vpk=33 revepsilon=4 mfg=Littlefuse type=TVS) That's i...

4 comments posted 3yrs

posted by jlarkin

4 comments posted 3yrs posted by jlarkin

something strange at the checkout

At Holy Foods the other day, a strange occurrence - I was doing the self-checkout, placed an apple on the scale, but ac...

25 comments posted 3yrs

posted by r_delaney2001

25 comments posted 3yrs posted by r_delaney2001

lithium fires

Today's NYT describes a nasty fire in an apartment building in Manhattan, started by a bicycle battery. There have been...

31 comments posted 3yrs

posted by jlarkin

31 comments posted 3yrs posted by jlarkin

Gas shortage UK

It's happening already.... https://www.dropbox.com/s/0iph3vmipjmk6qu/grid.jpg?dl=0 I've never seen the cables from Europ...

230 comments posted 3yrs

posted by CK1

230 comments posted 3yrs posted by CK1

Mains power voltage drop to reduce usage?

Instead of rolling blackouts when there's a power shortage, why don't we just allow (or deliberately) the voltage and fr...

192 comments posted 3yrs

posted by CK1

192 comments posted 3yrs posted by CK1

Mains power voltage drop to reduce usage?

Instead of rolling blackouts when there's a power shortage, why don't we just allow (or deliberately) the voltage and fr...

602 comments posted 3yrs

posted by CK1

602 comments posted 3yrs posted by CK1

USB to CAN bus to TTL serial

If I were to use CAN bus on the test fixture I'm planning, I would need a USB cable that looks like a UART to the PC. T...

20 comments posted 3yrs

posted by gnuarm.deletethisbit

20 comments posted 3yrs posted by gnuarm.deletethisbit

Help with high input impedance amp.

Years ago on this group, someone worked this circuit out for me and I have finally built it. It has two problems. The i...

85 comments posted 3yrs

posted by amdx62

85 comments posted 3yrs posted by amdx62

Fun with EV to Vegas

North bound at Mountain Pass is out. No problem, i'll drive pass the center media to the south bound charger. I wonder...

14 comments posted 3yrs

posted by edward.ming.lee

14 comments posted 3yrs posted by edward.ming.lee

TIA/EIA 568 A vs. B

I was looking up the wiring diagrams for Ethernet cables and found TIA/EIA 568A and TIA/EIA 568B wiring diagrams. They...

27 comments posted 3yrs

posted by gnuarm.deletethisbit

27 comments posted 3yrs posted by gnuarm.deletethisbit

Anybody want an Amp/TE crimp tool for MTA 100?

Part number 58074-1 with insert 58246-1 Can ship to the USA £75 ea plus shipping. New cost is~ $500

1 comments posted 3yrs

posted by kraken.sankey

1 comments posted 3yrs posted by kraken.sankey

Eternal-september problems

I have some Thunderbird email program problems, I haven't been able to resolve, and then in the middle of that eternal-...

27 comments posted 3yrs

posted by amdx62

27 comments posted 3yrs posted by amdx62

John Larkin, Dremeling PCBs

Hi John, You Dremel carve some pcb test boards. I did my first last night, I got it done, but not the best. Do you have...

47 comments posted 3yrs

posted by amdx62

47 comments posted 3yrs posted by amdx62

LIDAR hacked

LIDAR hacked https://www.sciencedaily.com/releases/2022/10/221028111540.htm

0 comments posted 3yrs

posted by pNaonStpealmtje

0 comments posted 3yrs posted by pNaonStpealmtje

spread spectrum cheating

We make a bunch of boxes that go into a semi fab tool. One measures an optical waveform and shoots it to a bigger box,...

39 comments posted 3yrs

posted by jlarkin

39 comments posted 3yrs posted by jlarkin