Consumer Electronics

45 watt output to each of four speaker connections

It has has Lithium ion battery.

1-800-272-6229 in US and Canada

what is name for input devices?

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black 0

brown 1

red 2

orange 3

yellow 4

green 5

blue 6

violet 7

gray 8

white 9

gold 5%

silver 10%

none 20%

for resistors and some other components capacitors inductors

because in ckt connection there r done some ohmic loss due to the connecting wires and other factor , so voltmeter reading is not equal to its rated reading.

and this also done due to different error like instrument error , measurement error etc...

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The television has been available since the 1920s, while the first computer (in the modern sense of the word) was first created in the late 30s-early 40s. The computer, however, wasn't commercially available until 1975 when the Altair 8800 was released.

No they refer to two different features to the electronic device you are considering.. Intrinsically safe basically means your electronic devices circuit board are not going to blow up in certain atmospheres... ie- near other electronic equipment

Solar cells and batteries are similar in that they both produce electricity.

they have expandable memory and they come in cards which just slot into a mounted part

LM317 is a variable-output voltage regulator. I would expect to find it in small home appliances with electronic controls, portable radios, car electronics, cell phone chargers, etc.

If you need to find the chip somewhere to do some repairs, you can probably ask a manufacturer to send you a (free) sample. Otherwise, you can buy small quantities online from places like digi-key.

A: This was asked before and the criteria remains the same a very hi reasoning quality to think concepts and troubleshooting along to know which book to look up for an answer. Nobody knows it all nobody can. To complex, to many fields

Just an addition to the above answer, I agree that choices are broad, but, then its a good thing also. By Identifying your interest area, you can be a master of that one specific field.

The initial step is to know the various specialization in the field of Electronics, having a superficial knowledge of them and then decide, what intrigues you most?.

I hope that part is already covered. Next step might be in the identification of the current direction of the research going on. For this, reading magazine articles are more useful over journals.

I hope this was helpful.

As far as I know, Cree has been in the LED chip manufacturing business for a lot longer than Osram and Philips and other lamp companies that have previously focused on older models like incandescents, halogens, and CFLs. As a result of this advanced engineering, LED bulbs from Cree, or smaller companies that use Cree chips such as LED Waves in NY or ElementaLED in CA, tend to be higher quality and last longer.

The horizontal sweep of an oscilloscope is in time per division or seconds per division.

A diode is a component that lets current flow in only one direction. A zener diode has an additional property that current will begin to flow in the reverse direction when a reverse voltage is applied above a certain threshold. This property is generally used for voltage regulation purposes. A diac has similar voltage regulating properties but behaves the same in both directions - current will flow through it when a voltage above it's threshold voltage is applied in either direction. It is therefore useful in AC as well as DC circuits. Below the threshold voltage the diac will be off - no current will flow. A diac is electrically similar to a neon bulb or gas regulator tube.

This is the European "Pro-electron" numbering system compared with the US JEDEC system (2N etc)

First - Letter

A = Germanium Device
B = Silicon Device
C = Gallium Arsenide

Second - Letter for A/B/C devices

A = small signal diode
C = small signal general purpose transistor (for audio or slow speed switching)
D = power transistor (audio and low frequency applications_
F = small signal RF transistor
T = SCR / Thyristor
U = power transistor for switching applications
Y = rectifier diode

Third + Fourth + Fifth - Unique identifier number

Some manufacturers put some significance on the number. For example Mullard/Philips treated the second digit of 4 meaning NPN Lockfit case and 5 meaning PNP lockfit. Many used 6 for TO92 cases.

An optional letter followed indicating a gain grouping ... typically A being lowest, B middle and C highest

Different manufacturers created similar transistors with different type markings.

e.g. BC107 BC167 all functionally very similar.

So, the BC147 is a Silicon small signal audio transistor with a "Lockfit case" originally manufactured by/for Philips/Mullard. A viable replacement today, if you can't find a 147 is a BC547 If there's a gain grouping letter, you need to match the gain grouping either by a comparable letter, or by testing. Careful with the pinout.

There are a cluster of similar transistors ...

So, the BC147 is one of a cluster of 3 similar transistors ... BC147/148/149. BC147 has ratings of VCE 50, VCB 45 ICMAX 100 hfe 125-500
BC148 has ratings of VCE 30, VCB 20 ICMAX 100 hfe 125-500
BC149 has ratings of VCE 30, VCB 20 ICMax 100 hfe 240-900 Noise 2dB

Lockfit transistor pinout (wideface down)
B
E C

BC547 pinout (flatface down)

E B C

laminator

1. Electricity can cause pollution if it is generated by fossil fuels, or nuclear energy. It can affect animal life if it is generated by hydroelectric dams or tidal power.

2. Electric devices, circuits, conduits, and transmission lines present a shock hazard to people: those who use it, those who work with it, and those who provide it. Short circuits and sparks also present a fire hazard.

3. High voltage lines are thought to cause hazards to plants, animals and people who live near them, because they produce magnetic and EMF fields.

4. People who have become dependent solely on electricity may be unable to function without it in an emergency.

A simple (and I do mean simple) formula is approximately 100 watts per amp. So, 700 watts total equals 7 amps, with 8 amps to spare on the 15 amp circuit breaker.

It's really a bit more complicated than that, considering rms voltage/current equation, but it's close enough for government use. ;)

I think you mean 1/4W and 1/8W ratings for resistors. If so, it indicates wattage (power dissipation) ratings for resistors. Basically this specification for resistors shows maximum power that can be allowed to dissipate in the resistor. Wattage does not as such affect the value of resistor (it should remain with in % tolerance value specified when operated within specified wattage).

( P=I^2 x R). or (P = I x V)

P=Power, I = Current, R= Resistance, V = Voltage Once you know the power rating, you can calcutate how much current can be passed through a resistor of specific value without causing a damage to the component or circuit. For long term reliability always it is advisable to design with a margin (for 1/4W or 250mW e.g. design so that it is always certain % less than the rated e.g. operate at 200mW or less) - Neeraj Sharma

I had the same thing happen. I replaced the batteries in the outdoor sensor, but just got the two dashes on the clock that should display the outside temperature. After I replaced the batteries in the clock itself, the outside temperature then showed up properly on the clock. I also took all batteries out of both devices and replaced them in the order recommended in the directions on the back of the clock. I hope that helps.

A manual typewriter cannot have multiple fonts being used at the same time. The cylindrical type heads of a manual typewriter were also replaced with a spherical type ball in the electronic version.