Questions tagged [consumer-electronics]

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1answer
33 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 ...
1
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3answers
115 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 ...
2
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0answers
23 views

Electrical component most likely to fail in window AC unit after power surge?

I have a window AC unit, 115 VAC, 10 amps. Power went out earlier in the week due to the big storm on the east coast and once it came back on every LED on the control panel was lit (not typical) and ...
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2answers
62 views

Why was air conditioning so early and wide-spread in the USA specifically?

As far as I understand things, air conditioning was standard in cars in the USA as early as by the mid-1950s or so. Perhaps even sooner. In the late 1990s, our car (common model of Volvo, albeit a few ...
2
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3answers
52 views

Did toasters ever make the toasted bread jump up in the air when done?

In numerous cartoons, video games, movies, etc., I've seen how a toaster makes the toasted bread jump high up in the air when done, forcing the user to catch them mid-air or pick them up after they've ...
-1
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1answer
36 views

As a rugged and waterproof device, how does gopro dissipate heat?

I am new to designing rugged + waterproof products. I am curious about how to dissipate heat when the electronics are running and the ambient environment is even hotter. It seems like the mode of heat ...
47
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13answers
11k views

Are toasters really electrified inside of the “slots”?

My mother was born 1950. Me in the mid-1980s. All my life, she's been saying that I must never stick a metal object, such as a knife, into the toaster, because it will electrocute me. I've always been ...
2
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4answers
79 views

How can the ink dry so quickly after it comes out from an inkjet printer?

Every time I print a page with my inkjet printer, knowing that it literally "jets" ink all over the sheet, I'm baffled by how it's immediately dried. I cannot smudge it with my fingers even ...
-1
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1answer
68 views

How are the electronics and chips inside the microwave protected from the microwave radiation/energy?

Let's say I put in an endoscope like camera with the lens at the inside edge of the box and the wire behind metal sheet. Here's a mockup: Could use microwave reflecting or absorbing wrap to wrap the ...
0
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1answer
55 views

Was our wireless home telephone in the 1990s encrypted or completely insecure? And how did it work so far from home?

In the mid-1990s, our family got a cheap (I assume, since we weren't rich) but at least brand new telephone which either had two wireless "units", or one (my memory is a bit foggy on this detail), but ...
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1answer
35 views

What is the plastic cover thing for in microwave ovens?

With every microwave oven I have ever had, it has come with a plastic thing that you are (apparently) supposed to put over the food when microwaving it. Some food products mention this and tell you ...
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2answers
68 views

Why do modern consoles require active cooling when old consoles did not?

I grew up with the Pong, NES, SNES, Mega Drive, Saturn, Nintendo 64, PlayStation, Game Boys, etc. None of these made any kind of noise when powered on. They were 100% silent. You just flicked them on, ...
2
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3answers
69 views

Why does audio equipment buzz/humm when a long signal cable is used and how do I eliminate it?

I have two 5.1 speaker sets, one in the front and one in the back of my living room. I have connected them together with an "audio wire" (non-shielded unfortunately) that's 12 meters in length. Since ...
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1answer
71 views

What is this gigantic high-tech cylinder in the corner of a middle-class Chinese family's living/dining room in Shanghai? [closed]

My guess is that it has something to do with the climate, but why is it so big and cylinder-shaped? I guess it could actually be a fridge, but it looks too oddly shaped to be that. But maybe. The room ...
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0answers
23 views

Why do devices need to specifically support different sizes of memory cards?

Why do digital cameras and many other electronics devices today, which support a specific standard such as "SD flash cards", have to specifically support all the different "sizes" (as in, storage ...
-1
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1answer
37 views

How is digital image-data converted to a laser projection in laser printers?

By laser projection I mean the laser beam that is projected onto the photosensitive drum in the laser printer. The printer receives digital image data from a computer processes it and projects it onto ...
1
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1answer
42 views

Is it still a bad idea to keep modern electronics plugged into the charger cable for longer than necessary?

I have an "DaVinci IQ" portable vaporizer. Since the battery quickly runs out of power, I often keep it lying next to me, plugging from the computer into its USB-to-Mini-USB (or maybe it's Micro-USB --...
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0answers
57 views

How to add external sensor data to pictures, canon DSLR, hot shoe, electronics

Here's a challenge - I am trying to add different sensors data (height,temperature,distance by laser) to pictures i take with a canon DSLR camera. Would it be possible to connect different sensors ...
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1answer
42 views

Electronic component datasheet handling

What is $V_{IH}$ and $V_{IL}$ in datasheets? I found High-level input voltage and Low-level input voltage on the datasheet?
0
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1answer
580 views

What is the range of frequency used in TV remote?

Household TV remote control use Infrared rays. Infrared rays have frequency from 300 GHz to 430 THz. What is the range of frequency used in TV remote?
2
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0answers
27 views

Health hazards of disassembling electronic devices?

I´ve been disassembling a lot of electronic devices in order to recycle them, separating plastics, electronic boards and bolts/other metal parts. Is there any proof of health hazards for doing it ...
0
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1answer
19 views

What is the mechanism of transition in applications of finite state automata?

Just began studying automata. I've already seen several examples of the applications of finite automata: pattern matching, automatic doors, etc. And so far, I understand the logical connection between ...
0
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1answer
40 views

Pathway for drone racing

How can I build a v shaped pathway for drones? It would be a sort of racing path and there would be multiple drones flying over the pathway at the same time. The race would be a relay race. So there ...
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0answers
110 views

LED Lights Dimmer Electronics

I have a Wemo Smart WiFi Smart Dimmer with me that can control CFL, Incandescent and LED lights. (https://www.belkin.com/us/p/P-F7C059/). I am curious to know how one device can handle all type of ...
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2answers
86 views

Compensating for a magnet in a device with a magnetometer

I'm working on a device that relies on data from a magnetometer. Unfortunately, the device also needs to have a fairly powerful magnet on it. Given that the design is fairly flexible, and within ...
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1answer
515 views

Can one build a custom Android TV by buying different components of the system? [closed]

With a spec as good as Nvidia Shield plus one with a build in TV tuner?
1
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1answer
40 views

How to use consumer electronics for industrial application on high temperature

I need to measure the width of a bar made out of glowing red steel (900-1200 degrees Celsius) using computer vision. In order to ensure resolution of a 0.5 millimeters/px, the camera is needed to ...
0
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1answer
81 views

Why aren't these kind of drivers used in loudspeakers?

This is a driver in a headphone. These can produce every sound and beyond that humans can hear. I understand that there are full range speakers that are sometimes used, but they work in a very ...
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0answers
39 views

I would like to run a smartphone using a primary battery instead of rechargeable for a project. What are the 4 contacts used for on the factory LiPo?

Most phone batteries will have a connector of some type with 4 contacts. Of course two of those I'd expect to be +- Voltage, but the other two compose some sort of mystery input to the phone (...
0
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1answer
20 views

Is it possible to cook with low power PV systems (under 300 W)

This topic is slightly related to this one, with some extra details. I would like to go off-grid and therefore buy a PV kit. I can see that the prices for PV systems with a power of +3kW are very ...
0
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1answer
236 views

Audio frequency sweep spectrogram artifacts… hints?

I'm wondering how to interpret artifacts on spectrograms like the following which shows the recording of a linear frequency sweep. In this case: The recording is done with a cheap microphone and ...
4
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2answers
125 views

Does a transformer use power when devices aren't attached?

I have just purchased a 45 W 12 V transformer with an integral photocell for landscape lights. I measured the voltage while it was plugged in and the photocell closed the circuit (off) and there was ...
3
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2answers
225 views

Why are LED blinking?

If you carefully look at LED in flashlights, they are blinking at fast rate despite the batteries are DC. It's even more obvious on flashlights with separate R,G,B LED (to allow the control of color) ...
2
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2answers
526 views

Do smoke alarms become more sensitive as they get older?

From what I understand a smoke alarm works by emitting some sort of radioactive particle and then counting how many of these particles hit a receiver. When there is smoke in between, it blocks some of ...
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2answers
2k views

Looking for a current multiplier circuit - if possible

I used a very inexpensive circuit based on the TP4056 chip and built a Lithium Ion battery charger for 18650 batteries. The problem is, the batteries I use have so much capacity that the circuit, ...
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2answers
76 views

Is it possible that an electronic device “half-works” when the power adapter supplies too much voltage?

I work in a lab, and I've been trying to replace a lost AC-DC power adapter. I got one recently that has the exact specs that I need, which are apparently pretty rare (15V, 400 mA). However, when I ...
2
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2answers
152 views

Identifying affordable alternatives for low-frequency high-current DC-DC solid state relays

Please note, this is not a shopping question; this is a what type of component works best for this scenario question. I have an induction heater circuit and a 5A max. / 24V wall wart, and I'd like ...
3
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1answer
39 views

Analog addressing flat panel display

Cathode ray tubes (CRT) are analog addressing displays because you can light a point on its surface applying a continuous electric or magnetic field to deflect electrons beam. Virtually, there is no ...
1
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1answer
189 views

Why do microwaves get louder when the timer goes off?

With most microwaves I've used, I've noticed that once the timer goes off, there is a couple seconds where the "microwave sound" gets louder and it seems to be cooking more intensely before it ...
14
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2answers
3k views

What is this small rotating part from a cell phone?

What is this tiny rotating piece of hardware that I found inside my Samsung GE1202? It has E9C written in blue on it.
1
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1answer
130 views

How to join between two PBX telephones wirelessly?

I have two PBX telephones. Each one has a line cables to the houses, but there is no connection between these two pbx telephones, neither wire nor wireless. How can I join between them wirelessly? ...