Electronics Forum / Basics / September 2006

If a PAM [Pulse Amplitude Modulation] signal and its PCM [Pulse Code
Modulation] equivalent were graphed, how would their appearances on the
graph differ from each other? IOW, how would the PAM look when compared
to the PCM [and visa versa]?

Hello everyone, I don't know if this is the best place to ask, but I
just had a few questions about elementary wiring / circuits topics
Firstly, when looking at a circuit diagram with a voltage sourse in it,
which terminal of the voltage source / battery is the flow of

i just bought the easyProg board from http://www.embedinc.com/easyprog/
I bought the PCB board from thm and ordered the parts form digikey but
I had many parts here.
The circuit voltage seems to corespond to the data sheets of embedinc.

I am trying to read a capacitor I just purchased from digikey. it says
on the package 22PF ceramic 5%. But when i look at it, i read  22J.  I
thought 22J was read 22uF, this is using information from thjis web
site

I am planning to remove the light fixture from one of our rooms and put
200 LEDs instead. LEDs are going to be:
Reverse Voltage:5.0 V
DC Forward Voltage: Typical: 3.4 V Max: 3.8V

does r/f input ,audio input willmake modulation?whati s the range of
r/f input?

Does a voltage multiplier always require AC or pulsed DC to run it?  Are
there any types that will multiply unpulsed DC?
R

I have a pressure sensor (http://www.farnell.com/datasheets/8717.pdf - page
4) which uses positive and negative pins to output the pressure. As the
pressure increases the (potential) difference between the pins also
increase.

Copper ballast
                        240V tap  220V tap
           line              _________
              +-------------+UUUUUUUUU+---------++

Seriousry.
Math was pure tedium when I was in high school.  I programmed my
computer to do my math homework for me.  As a result, I didn't learn
much. I'm paying the price now. In fact, the first few times I've tried

I found a cheap TV Tuner for my PC on ebay. It comes from Asia, is it
possible that it won't be compatible with the antenna cables we have
in Europe (Greece)?

How could I detect the presence of a nearby cell phone? I'm assuming most
are sending out a query pulse every millisecond in search of a matching
signal that would make them ring. So they are transmitting a signal
continuously in human terms. What kind of circuit do I need to ...

i have recorded in the cam but could not transfer the entire content of
the minidv in the cd using a usb cable...

Hey all,
   I have a great new invention, the Dark Emitting Diode (DED).  You put
it in a dark closet and it generates electricity.  Kinda cool huh??  
   Im taking orders.  Please send the check to my house.

I am using an audio amplifier of transistor 2N3055 .It uses two
transistors for one channel and 4 for two channel amp.I have two
channel amp with 4 transistors and using it with computer.The woffers
used are one is 10 inches and other is 12 inches .I want to increase