The electronic circuits/nucleus of the computer which perform the analytical, computational and logical functions occuring durring the work session..?

The flashing underscore on the screen where the next data will be displayed..?

The data entry point on the display screen which indicates to the suer the computer is ready to accept commands..?

A collection of characters of information..?

the short term memory used for storing and retrieving data while working on the computer..?

The process of entering data into the computer from storage or the keyboard..?

The storage area that holds the info for/during processing by the CPU..?

A list of options displayed on the screen. The user causes the computer to perform tasks by keying or selecting specific items..?

Programmable keys that perform different operations as assigned by the software programmer..?

The process of protecting stored data by covering the notch or opening the tab to ensure against the accidental erasure of information on the diskette..?

http://www.discovercircuits.com/PDF-FILES/SHADOWDET1.pdf
In the circuit given in the url, can anyone check for me how is C4 connected?I use a 9V battery,should i connect its negative straight to the ground or to the C4 before it goes to ground?This circuit looks simple but i find it confusing
Thank you very much mr mike,Another question i would like to know …are all pin photodiodes the same?can i use a pin photodiode of a different type for this circuit?

Which drill sizes are the most likely to be useful when making pcb:s?

I’m looking for an electronic lock w/ keypad. I’m looking for something to open/close and electronic circuit (like to turn on/off a light bulb). I’ve searched all over the internet, only finding electronic DOOR locks (I don’t want to use these). I was hoping to find one that has 12 keys (0-9, #, Ӿ), an LED/LCD display (to show keys hit, open/close, or anything else), and 3 LED’s (they would be to indicate ELECTRICITY FLOWING, CORRECT, INCORRECT). Anyone know where I could find something like this? Thanks!

i accidentally broke a retainer clip for the psp’s circuit board that holds the light to the psp, if i hold it in place, it works, but what can i do to fix this? will superglue work?

They have all gotten so expensive, or they don’t allow multiple parts (none of their business, anyway), or don’t do gold fingers, or take forever.