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Consumer Electronics
Ask questions here about the electronics you use every day: from phones and computers to kitchen appliances and radios.
4,952 Questions
What is the function of TV flyback?
The TV flyback transformer is obsolete in modern television sets and is not used.
In the old cathode ray tube (CRT) television sets the flyback transformer had two functions:
- generate a large and powerful current pulse to drive the horizontal deflection coil in the yoke around the neck of the tube to create a quick horizontal retrace between sweep lines
- using a large secondary autotransformer winding produce a very high voltage (i.e. 15KV to 100KV) rectified by a high voltage diode needed by the anode of the CRT to accelerate the electron beam
What two things must happen to cause an silicon controlled rectifier to fire?
You must have a voltage on the gate that exceeds the turn-on threshold of the SCR. Typically around 0.65v. Then you must maintain a minimum holding current from Anode to Cathode. Once turned on, the SCR will remain self latched in the on state until the current through the Anode and Cathode falls below the minimum self holding current.
A passive subwoofer doesn't have a built-in amp and will require the use of an amp.
Truth table of 1 to 16 demultiplexer?
Strobe
A
B
C
D
Output (Y)
0
0
0
0
0
D0
0
0
0
0
1
D1
0
0
0
1
0
D2
0
0
0
1
1
D3
0
0
1
0
0
D4
0
0
1
0
1
D5
0
0
1
1
0
D6
0
0
1
1
1
D7
0
1
0
0
0
D8
0
1
0
0
1
D9
0
1
0
1
0
D10
0
1
0
1
1
D11
0
1
1
0
0
D12
0
1
1
0
1
D13
0
1
1
1
0
D14
0
1
1
1
1
D15
1
X
X
X
X
1
where A,B,C,D are the control input or control nibble and the Boolean expression for Y is given as:-
Y = A'B'C'D'D0 + A'B'C'DD1 + A'B'CD' D2 + A'B'CDD3 + A'BC'D'D4 + A'BC'DD5+ A'BCD'D6 + A'BCDD7 + AB'C'D'D8 + AB'C'DD9 + AB'CD'D10 + AB'CDD11 + ABC'D'D12 + ABC'DD13 + ABCD'D14 + ABCDD15
What does within proximity mean?
it means to be nearby or close...proximity means close...so to be within proximity is to essentially be "even near"...i hope i helped :)
What determines the transformer ratio?
Transformer ratio, more correctly turns ratio, is the number of turns in the primary winding divided by the number of turns in the secondary winding.
What does 100 to 240 V mean for use in the UK?
If "100 to 240 V" is stated on the rating plate of a small electrical appliance, such as an electric razor or a plug-in power supply for something else, that means it is designed to operate on any voltage between 100 Volts and 240 volts.
* So the appliance will work if it is plugged into a 120 Volt household AC power supply in the US, Canada or elsewhere in the world which uses a similar supply
and
* it will also work on a 230 Volt household AC power supply in the UK or any other country in Europe or elsewhere in the world which uses a similar supply.
It would be a lot of trouble for me to try to explain the working principle of ground resistance tester since my English is no so good but fortunately I can give you the right internet address so you can download the exact information you need: www.dranetz-bmi.com/pdf/groundprinciples.pdf
Alexis
Havana, Cuba
There are many factors to consider when looking for development engineers. Finding them is easy. A search of the Internet will produce hundreds of companies around the world. Choosing one can be much harder.
Look for experience in your market sector and discipline. Look at the size of the company to make sure they will cope with the projects. Ensure that they are willing to work to agreed timescales and standards. Know whether you will own all rights to the software produced at the end of the project.
These are just a few things to think about when choosing any design team. Put in the time and effort in the selection and it will be repaid well. Not spending time to research the companies will normally end up very costly.
What is digital object counter?
Digital object counter is a device which is designed to count the object which passing from above it or by touching it or whatever depending upon the method of getting signal from the transducer or smart devices. But main work of digital object counter is the counting of things or objects. it can be done by using LDR or THERMISTOR or VDR (these are used for sensing that a object is arrive or present here ) etc .
It is an alarm to alert someone or something that the power is no longer working.
How do you get japaniez codes to work on an American game on the action replay ds?
The codes won't work cause those codes are onley capible for the Jappaneese games.
How do you use high powered Chinese appliances in the US?
You need to buy a transformer to convert the voltage to 110V.
Setting the date on a cardinal watch?
to set the date on a cardinal watch,you simply use the mode button.You press and hold MODE for a few seconds and it gets you to the allarm the you press a few more sec to get to the time and the after settiong the time you press on ST/STP a few sec and it gets you to the date
How much is a Nakamichi 700ZXE worth?
Pricing something like this can present a challenge. Supply and demand is the issue. Consider that a majority of dealers in new and used stuff similar to yours have an active window linked to eBay up on their computers. Now why would they do that? Good luck.
Why do you neglect iron loss in transformer during short circuit test?
in short circuit test we apply rated current with the LV side shorted.so the applied voltage will be very low. iron loss depends on the applied voltage.so it is neglected
The song "Mr. Roboto" was written and recorded in 1983 by the rock band Styx, and released on their album "Kilroy Was Here". It charted at #3 on Billboard's Hot 100 chart in mid-1983.
You can purchase an MP3 of this song here:
http://www.amazon.com/Mr-Roboto/dp/B001NU6GB8/ref=sr_1_3?ie=UTF8&qid=1345144613&sr=8-3&keywords=styx+mr.+roboto&tag=brainrub-20
Would you buy a remote that beeps when you lose it?
This is more of an opinion-type question, but yes, I would buy one of those. It actually seems like quite a good idea. To me, anyway.
