6h
comment Multipoint Ethernet cable as an RS485 data bus
The shield of a shielded cable is a Faraday cage, provided it's connected to ground somewhere.
6h
answered Transition state between 0 and 1 in logic gates
8h
comment Two capacitors charged separately and connected in series. What will be final voltage?
Voltage has nothing to do with number of electrons.
12h
comment High speed data from microcontrollers to pc using daisy chain
How on earth are you going to get 300mbps out of an STM32F4?
13h
comment Does a Breadboard Compatible DC Barrel Jack Have to be Connected to Positive and Ground to Receive Power from an Outlet?
You have to connect both pins of a barrel jack for it to be useful - "only need it for positive" doesn't mean anything.
1d
comment Sexism in hardware engineering
It's also the sort of thing that's hard to address by anecdote - have you tried the IEEE?
1d
comment What do you call a transformer separated from a wall plug?
@MattYoung I once bought a box of 10 allegedly "CE marked" chargers for $10 just to see. Not only did they not bother to fake the certification the casing could come apart in your hand.
1d
comment What do you call a transformer separated from a wall plug?
You specifically want an inline one, rather than a "wall wart"?
1d
comment Technique to measure/infer Vf for LED given If
Ah, re:load is yours? Nice. MCP6002 supply voltage is only 6V though, whereas the traditional LM358 can handle 12V and claims the ability to operate at the negative rail as a bullet point on the datasheet, so I might try one of those.
1d
comment Technique to measure/infer Vf for LED given If
What's the phrase to look for in a datasheet that describes that property? (Do you have a preferred example?) - thanks
1d
comment Technique to measure/infer Vf for LED given If
With the adhoc current limiter, suppose I use a 0.1R low side shunt; that gives 70mV. Does that work as an opamp input or is it too close to the ground rail? Edit: I guess the answer is yes, given electronics.stackexchange.com/questions/144285/…
1d
asked Technique to measure/infer Vf for LED given If
1d
comment LED Mini Bulb Project wiring issue
In re update: how bright do you want it? What colour? Is this for illumination or just an indicator light?
1d
comment Replacing 18650 cells in laptop battery with greater capacity ones
Yes, I too am keen to know why mechanically holding the cells together is considered risky - it's what AA-style battery holders do all the time. Obviously it needs spring pressure inside the case to do this.
1d
comment s-video amplifier
up to 90MHz. It's entirely suitable for amplifying S-Video.
1d
comment s-video amplifier
Or if you really want to build your own, try linear.com/product/LT1253
1d
comment s-video amplifier
Not sure about whether a TV amplifier would work, it might be input-filtered to the TV bands. "S Video Amplifier" and "video distribution amplifier" return quite a lot of hits on google..
1d
comment s-video amplifier
Do you need an amplifier? 10m isn't tremendously long.
2d
comment How to detect thermal shutdown of a stepper-motor controller IC?
You can sense high currents with either special low-value shunt resistors or more expensive Hall effect sensors. Or you could detect the motion you're driving directly.
2d
comment How to measure the accuracy of a digital multimeter when we don't have its datasheet?
There's a potentially very interesting question here about references and error. In the meantime, have a look at electronics.stackexchange.com/questions/26179/…
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