ue of resistors capacitors diodes ETC to use?

I need software to calculate unkown elements in electronic circuit design. Like resistors, capacitors, etc. To change values and watch changes. Thank you forward!

I think it is a resistor, but might be a capacitor or something else. It is beige in color with no color bands on it, i know usually a resistor has color bands on it. Also the resistor ones on the circuit board has color bands, and is called with the letter R in front of it, the one that I need to replace has a C in front of the circuit number. Can anyone tell me how to determine what to get on this? Its not long and skinny like most resistors, with color bands, its about 3/16" long and almost egg shaped. There is a 1.5 amp fuse on the board that blew, i could only find a 5 amp to replace. I know that is why it probably burnt in two, do have the correct fuse now. Thanks
On the burnt one, the best i can tell with a magnifing glass is it has this on it.
RSC 104
Some of the other ones that look the same has this on them as well, though hard to tell even with a mag glass.

7. What is the total resistance of a circuit that contains two 100 Ω resistors connected in parallel? A. 10 Ω C. 50 Ω
B. 30 Ω D. 150 Ω 8. Which of the following is the correct Ohm’s law formula used to find current?A. l=R-E B.l=E-Rl C.l=E=R D.l=PR 10. If the voltage in a circuit is 24 V and the current is 2 A, what is the total power in the circuit?
A. 6 W C. 72 W
B. 48 W D. 102 W 11. What does the abbreviation VOM stand for?
A. volt-ohm-megohm C. volume-ohm-microamp
B. volt-ohm-milliammeter D. volume-origin-megohm14. What is the total power in a circuit with a current of 4 A and a resistance of 12 Ω?
A. 4 W C. 48 W
B. 16 W D. 192 W

i know there all the resistors and transistors but how do i tell what they are and what else is on there. also can i use just an random circuit board for anything or are they made special for certain things.

A fuse is a device designed to break a circuit, usually by melting when the current exceeds a certain value. Fuses are widely used in electronic equipment, but have been replaced by circuit breakers in household wiring. In the "old days" people would sometimes replace a blown fuse with a penny, which happened to be the same size as a fuse. Was this a safe practice? Why

High-voltage power supplies are sometimes designed to have a rather large internal resistance as a safety precaution. Why is such a power supply with a large internal resistance safer than one with the same voltage, but lower internal resistance?

Can all combinations of resistors be reduced to series and parallel combinations?

Old-time Christmas tree lights had the property that, when one bulb burned out, all the lights went out. How are these lights connected, in series or in parallel? How could you rewire them to prevent all the lights from going out when one of them burned out?

I’m going to make this circuit (http://forum.allaboutcircuits.com/attachment.php?attachmentid=13352&d=1257607202) ( A LED lamp using Phone line power, this was found from internet). In this circuit, the well-known LM317T volt regulator is used to control the voltage. However I have a doubt of arrangement of these components. As per the data sheet, In order to control voltage, two resistors need to be used as my 2nd pic(http://forum.allaboutcircuits.com/attachment.php?attachmentid=13351&d=1257607202). So please tell me whether this is correct….. (I’m not an electronic expert..:-( )

I have small battery powered electronic toy that makes sound. I would like to amplify the sound to make it louder. I have a very basic knowledge of electronics, so I could add small capacitors or resistors to some wires, but anything involving complicated circuit boards or actually rewiring the toy itself are pretty much out of the question. Thanks…

I want a user friendly software that uses a drag and drop approach to design a electronic circuit, measure current or voltage between any points, some basic components in it like resistors, transistors, capacitors etc… Do you know any software like that?
Sheldon, i wanted a drag and drop type software. not a programming software..

and Blackstreet you dipshit, your software doesnt allow me to test the circuit.. it allows me only to build it and chuck it out of window.
All these dipshits got the answer wrong.
All of these are only drawing software. But i wanted a software with which you can test the actual circuit.

I have three laser diodes connected in series.
They require 2.5V and 120-130mA to operate.
I have 8 available batteries, each 1.2V and 900mA.
I want to create a circuit using these batteries and laser diodes, without overloading the laser diodes, so resistors need to be added to the circuit.
What circuit do I require for this to work? Please include resistor
values
Thank you!

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