i found an amplifier circuit and i need to know how many ohms each resistor should get and you need to leave me a list and to be precise a rigerise(pardon my spelling) each resistor is lables r and with a number beside it
and there is a mystery symbol in the left side of the picture (it's beyond me but i need help with this project and the symbol is next to the only loose wire to the left)
my design is in the link below
http://img96.imageshack.us/my.php?image=save0231nw9.jpg
2006-09-09 15:16:40 · 4 answers · asked by macgyver 1 in Science & Mathematics ➔ Engineering
the point of this question is to find out how many ohms are required for the resistors
2006-09-09 15:29:04 · update #1
the mystery symbol is a "ground". When using a power supply (or batteries) the + goes to the V+, and the - goes to the ground.
Who knows what the resistor values are, for that matter, what transistors are being used. Your best bet is find out who drew it and ask them.
2006-09-10 02:44:54 · answer #1 · answered by justme 7 · 0⤊ 0⤋
This diagram does not have the resistor or transistor info on it. Somewhere there is a key that will tell you what the corresponding values are.
There are usually 4 stripes on a resistor. The colours correspond to the numbers 0 to 9 in this order. Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Grey, White.
The first two stripes are numbers ie. Red, Red, would be 22.
The third tells you how many 0's to put after the numbers. ie. Red, Red, Blue would be 2200000. So this would be 2.2 million Ohms, or 2.2 Mega Ohms.
The fourth stripe is just the tolerance and should not matter right now.
The transistors will have a number on them and the key will say which one is which. There is a good chance they are all the same for this project.
Good luck.
2006-09-09 15:54:50 · answer #2 · answered by icetender 3 · 0⤊ 0⤋
first the things with arrows are transistors, second - the diagram doesnt tell you how many ohm's the resistors are. Theyare labeled jst as 1, 2, 3, ..... the info is missing. Maybe get an op amp chip and add afew resistors and use that instead. Or at least a better circuit design
2006-09-09 15:22:46 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The resistor values will depend on the desired amplification factor (the ratio of Vout divided by Vin). So it's not possible to answer your question without that information.
The mystery symbol is called "ground". I think the figure needs to be rotated 90 degrees counterclockwise.
2006-09-10 02:43:01 · answer #4 · answered by genericman1998 5 · 0⤊ 0⤋