All Questions
Tagged with electrical-engineering consumer-electronics
32
questions
0
votes
0
answers
14
views
How could we aproach development of touchscreen with morphing surface or morphing keyboard?
There is this technology of braille e-readers. It is relatively simple and reliable but it never had much commercial success probably because small customer base.
In past a company called Tactus tried ...
0
votes
0
answers
13
views
How to measure the electrical properties to ensure the performance of a thin electrode/insulator stack-up?
I am a mechanical engineer by trade, and I am looking at some basic electrical properties that I need to measure to ensure the device meets the desired performance. The device consists of a two-layer ...
- 11
1
vote
3
answers
113
views
How can I keep a low voltage electromagnet on continuously for long durations of time?
Background
I have an application that requires an electromagnet (either 5v or 12v) to be powered on for long durations of time (up to a few hours). While looking for one online, I was having a hard ...
- 151
2
votes
1
answer
75
views
Does MEMS/Optical Gyroscope record Earth's Rotational and revolutional angular velocities
I am using a 3 axis gyroscope (Android device) to record angular velocities using a sensor data logger application.
When the device is placed stationary, the gyroscope recorded the following values:
...
- 21
0
votes
1
answer
60
views
Why do inorganic LEDs wear out?
Why do inorganic LED bulbs have a limited lifespan? For example, a manufacturer may quote that a bulb or monitor powered by an organic light emitting diode(s) has a lifespan of 50,000 hours, while it ...
1
vote
2
answers
152
views
Why am I getting such conflicting safety advice regarding opening up and dedusting/servicing my CRT TV?
I have asked questions on Stack Exchange. I have watched many videos on YouTube. I have asked professional TV repairmen. I get wildly different advice on the safety of opening my 1989 28" CRT TV.
...
- 19
0
votes
2
answers
185
views
Does an iPhone on airplane mode continue to emit electromagnetic radiation field?
I've been told that it does because it's still searching for networks or something, which doesn't really make any sense to me. But what does fit somewhat with that are notices in the android interface ...
3
votes
2
answers
196
views
How do 120V AC dimmable LED bulbs advertised as "flicker free" work?
I'm a layperson, not an engineer, so forgive the ignorance. I want to replace some dimmable 120V AC G8 xenon bulbs with LED bulbs, but so far three different LED bulbs I've tried, all advertised as &...
- 225
-1
votes
4
answers
43
views
Time period of charging a mobile phone via car
As car batteries provide only 12 V instead of ~230-250 V, I assume it takes much longer to charge them compared to a common wall socket?
- 123
0
votes
1
answer
148
views
How to know which opto-coupler is suitable for high current application?
I would like a suitable opto-coupler to use as isolation from a 12V and around 30A current and another for 5V and around 30A. Are there any good opto-couplers for those ratings?
- 33
0
votes
1
answer
62
views
Can internal heat reduce significantly a laptop's lifespan?
Some days ago I had an heated debate (pun not intended) with a friend regarding the use of my laptops.
Basically he says which I'm slowly killing them by using them for computing intensive tasks which ...
- 101
1
vote
1
answer
35
views
Is there yet such a thing as a "dynamic sheet of paper"? [closed]
I know about "e-ink", but I haven't heard anyone even mention that since like 2006 or something.
I'm looking for essentially a single A4 (or "Letter" size) sheet of paper which is ...
- 11
0
votes
0
answers
27
views
Has there been any deliberate implementation of combinational logic soft error correction in any consumer-level product, like a CPU/microcontroller?
It is well known that many error detection, mitigation, and correction methods, such as parity or ECC, have been available in large memory banks, like for RAM, for decades now, and even in CPU caches ...
0
votes
1
answer
73
views
How do I reduce the mains spike in a switched mode PSU?
I have a switched-mode PSU for a gaming laptop.
It has a bad habit of burning out the switches on mains extension panels when I turn it on (two in the last four days).
The turn-on surge is always ...
- 101
2
votes
4
answers
925
views
Why Sony headset's charging station doesn't charge other NiMH batteries rather than which came with it?
I've got a Sony MDR-RF4000 wireless headset, which is already 7 years old, so obviously its NiMH battery (Sony BP-HP550-11, basically a pair of AAA NiMH rechargeable batteries tied together) shows the ...
- 121