Okay, since I'm relitively new with electronics, I decided to ask here, just in case someone here knows about audio preamps. I got a few Ti RC4560's (Datasheet) and I can't quite figure out what I'm doing wrong.
I think that providing a schem of what I'm doing is kind of useless, so does anyone have any ideas? Do I have to use a resistor or pot to set the gain? How exactly do I do this? Thanks
Audio Preamp Headache!!!
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Logan Whitehurst, Musician Supreme
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there's nothing really special about that chip...it's just a dual op-amp they say can be used for audio applications. Do a google search on how to set up op-amps with negative feedback to control the gain. You'll have to use a fixed resistor and a pot if you want adjustable gain.
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Alright: I looked it up and did it, but still no dice. This is what I used: http://colomar.com/Shavano/op-amp3.gif . I used 10k's on both R1 and R2, and I followed the schem exactly, except putting the inverting input on ground, which I put on -In. Arg, I must be stupid or something.
Just to make sure it's not stupidity, A dot on the side of an IC indicates the notched end, right? Just checking
Anyways, is there any specific problems I also have to tackle? Nothing can be simple.
Just to make sure it's not stupidity, A dot on the side of an IC indicates the notched end, right? Just checking
Anyways, is there any specific problems I also have to tackle? Nothing can be simple.
Logan Whitehurst, Musician Supreme
R.I.P. (Deceased Dec 3, 2006)
You are missed.
R.I.P. (Deceased Dec 3, 2006)
You are missed.
you set up the circuit exactly like the schematic you have there? If you did, and you used 10K for both resistors you should just have an output that's double what the input is. So you have a 10k resistor from In- to ground, and another 10K resistor from out to In-? And the dot on an IC indicates where pin 1 is.
What I have shown you is reality. What you remember, that is the illusion.
"Say, what does this button do?"
All the dishes rattle in the cupboards when the elephants arrive
"Say, what does this button do?"
All the dishes rattle in the cupboards when the elephants arrive
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http://img201.imageshack.us/my.php?image=chiplm9.jpg
Sorry for the doublepost, but here's a diagram I drew up in Paint (Yuck)
Sorry for the doublepost, but here's a diagram I drew up in Paint (Yuck)
Logan Whitehurst, Musician Supreme
R.I.P. (Deceased Dec 3, 2006)
You are missed.
R.I.P. (Deceased Dec 3, 2006)
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I don't know if they should all be together, if I did and it worked, I wouldn't be asking for help heretimmeh87 wrote:shouldnt input-, output- and power- all be connected together?
also, if its direct form a wall wart, it might need to be filtered. (100uf cap)
Alright, I'll use a cap for the power.
Logan Whitehurst, Musician Supreme
R.I.P. (Deceased Dec 3, 2006)
You are missed.
R.I.P. (Deceased Dec 3, 2006)
You are missed.