Electronics Design

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Near disaster with PCB design

Today the PCB design component of my old CAD program CircuitMaker 2000 crashed as it occasionally does in Window 7 (it...
51 comments posted 6yrs
posted by nobody
51 comments posted 6yrs posted by nobody

Spam Phone Numbers

Like a lot of people, I use email addresses to catch the spam. I have a Ya hoo address for web sites where I don't care...
1 comments posted 6yrs
posted by gnuarm.deletethisbit
1 comments posted 6yrs posted by gnuarm.deletethisbit

Rise time measurment

Greetings, gentlemen, I'm using my 350Mhz Tek analog scope (model 2465A for the benefit of Jeff L.) to measure the rise...
13 comments posted 6yrs
posted by cd
13 comments posted 6yrs posted by cd

DAC1209 error; charge injection?

Anyone seen this before? Seems like I'm getting a huge spike (relatively speaking -- about 3 LSB) when flipping bit 11 (...
4 comments posted 6yrs
posted by tiwill
4 comments posted 6yrs posted by tiwill

RCA 18538A: Searching for data sheet

Dear experts, The two power semiconductors RCA 18538A which are used in an electronic ballast are blown. Unfortunately...
29 comments posted 6yrs
posted by reinhard.zwirner
29 comments posted 6yrs posted by reinhard.zwirner

Flux density

Reviewing stuff I forgot during lockdown, this is one thing I never got. H is amp-turns/meter, and having distance in t...
21 comments posted 6yrs
posted by fizzbintuesday
21 comments posted 6yrs posted by fizzbintuesday

Quality in SD Card Connectors?

Got a project coming up that will most likely use a removable standard-size SD card. Other than gold contacts (I assume...
1 comments posted 6yrs
posted by mpmillard
1 comments posted 6yrs posted by mpmillard

Oxford Vaccine Disappoints- Not Going According To Plan

The Oxford vaccine failed to impart immunity to rhesus macaques, which prob ably means the same will happen for people....
18 comments posted 6yrs
posted by bloggs.fredbloggs.fred
18 comments posted 6yrs posted by bloggs.fredbloggs.fred

I Need to Adjust the Visible Light Range

I am working on a circuit to alarm when the internal Vcc in a device is gon e. A sounder draws 3 mA but I can mitigate...
37 comments posted 6yrs
posted by gnuarm.deletethisbit
37 comments posted 6yrs posted by gnuarm.deletethisbit

OT: YT once again censoring contrarians

Doctor who promoted the acquisition of herd immunity as the most effective - and least economically ruinous - way to be...
47 comments posted 6yrs
posted by cd
47 comments posted 6yrs posted by cd

Top 23 Richest Engineers in the World

Slow and silent video. Something's up with all the Russians. https://www.youtube.com/watch?v=GjR3MbEk-FY&feature=youtu.b...
0 comments posted 6yrs
posted by bloggs.fredbloggs.fred
0 comments posted 6yrs posted by bloggs.fredbloggs.fred

amplifiers will, oscillators won't

I still have a skeleton in the cupboard and the current lock down seems fine to bury it for good. Let there be an ampli...
6 comments posted 6yrs
posted by dk4xp
6 comments posted 6yrs posted by dk4xp

Need: Cheap (Inexpensive) enclosures

In search of an inexpensive enclosure. Dimensions: 16"H x 14W" x 6"D (or thereabouts, but at least 6"D). Needs a hinged...
7 comments posted 6yrs
posted by mpmillard
7 comments posted 6yrs posted by mpmillard