Electronics Forum / Basics / February 2007

Hi....We did energy bands in class a few weeks ago...i should say that
i am clueless to a certain extent....
I have no idea about what effective mass is...can someone explain the
concept behind effective mass...i mean how can mass vary???the prof

This Website is designed for you to learn how to write a resume on
your own. Hiring someone to do a resume is not enough learn how to do
it on your own. If you do hire someone to help you write a resume this
will help you guide the resume writer to put in the correct

Can you help me guys
I made a circuit witch should control leds. Software on Atmega16 is
keeping led on on the bin 1 (PB0 (XCK/T0)) and blinking led on the bin
22 (PC0 (SCL)). Resistors before leds are 1k and Vcc is taken throw

Could you help me with a personal project that I am working on?
I need help creating a simple rechargable battery circuit.
I am making an acrylic flower with LEDs that make the head glow white.
This is a birthday present for a friend.

Hey all;
I'm trying to isolate sources of DC from my guitar effects pedalboard so
I've cracked open a few of the pedals themselves to check them out. on the
1st pedal, I measure 0.1 mV on the output (measuring from cap to ground). It

     Excuse me Please.
 help me. I want to know about basic processing unit inside a
computer. Andthen, tell me how do I learn about making a computer.
Thank. Your new frined

Hi! I want to measure the offset voltage of an opamp. First, I
configure the opamp in an unity gain buffer and measure the output.
The offset voltage is 64.16uV. Then, I applied this voltage to the
non-

I was just wondering if anyone knows what technique most modems use to
compute their Eb/N0.
Thank you.

Anyone have any experiences with this company?
http://www.kitsusa.net/phpstore/index.php?action=category&id=specials
They have a lot of cheap stuff and I'm thinking about getting the velleman
PC500AU 50Mhz PC scope.  Seems like a pretty good deal for what I

I purchased an extension cable (wire) for my computer speakers. My
speakers are in my bedroom next to the computer room so I put the
cable through the wall. The cable for my DSL connection also goes
through the same hole in the wall. After I did this I experienced some

I have lots of spare time after work and little spare money.
I wish I make big money. :-(
I plan to get my hands dirty - real circuit buildings. I'm going to
get the Nuts & Volts every month.

Hey all,
I need some advice on a basic touch-switch.
I'm hoping to make a "Dance mat" for a computer game I play: This is
four 20x20cm touch sensitive pads arranged in a cross formation,

I have one of these: http://www.ktnc.co.kr/product_04_01.asp
Its a security camera.
It is rated to work at 12V DC. They suggest that you should use a 300
mA 12V dc power supply to connect to an outlet. When I do that, the

My old (1994 mfg) 21" DEC digital monitor was screaming/whistling when i
went to log on this morning  not loud but annoying high pitch about
frquency/pitch ? of whistling through teeth. there were *no* power indicator
lights (eg. amber for low power sleep mode and green for active ) ...

I'm actually curious because when I tried playing around with some
circuit simulation I had accidentally interchanged the inverting and
non-inverting input in an inverting configuration. I knew my output
was funky so I tried doing hand calculations and my equations came out