Recent content by omonoid

oh yeah. in my work i should have wrote dydx instead of dxdy good catch. wow. maybe i can solve it now. lets see...wow... the answer was 0, after a page of work and a few hours of confusion

Integral of cos(8x^2)? multivariable calc Homework Statement Homework Equations none The Attempt at a Solution So i reversed the order... and couldn't figure out how to integrate cos(8x^2). I looked at my trig identities, tried on my graphing calc, and even wolfram alpha...

I tried incorperating a voltage divider on a 9v so i would have a + and - 4.5v going to the opamp. For some reason the oscope displayed a odd shaped non square wave. What am i doing wrong?

Fish yours was helplful and worked fine...its the only success I've had. I was just trying to get the schematics vk6kro put up working. Fish is there a way of reconfiguring yours to only have 1 9v? when i actually build it i don't want to have 2 batteries Also i threw in a 10k pot in place of...

Hmm i started at the oscope for like a minute and it was a flat line

ugh i must suck at simulating. My result was a flat line on the oscillospope I also noticed its a LM124 op amp. I only have a 741 here is my schemtaics for the simulation

thanks for all the feed back. I would like my final product to have a pot to vary the frequency and one to vary the amplitude. Would i just preplace one of the resistors with a pot to make the freq vary? Also for amplitude would i just wire in a pot before the output?

no that didnt work i aslo saw that as a possible problem. It is now a cap

now i just get a straight line

For my extra credit project i am building a simple square wave osc i am trying to simulate the schematics in Multism, a program i just learned today. Here are the original schematics: more info on the circuit is found http://www.circuitstoday.com/square-wave-generator-using-ua-741"...

Im using the radio shack 741 op amp. I haven't checked the output. All i did was give it power, and p[lug it into a headphone jack. The headphones just buzzed, but the 10k vol pot changed the vol of the buzz. Im about to go to bed, so i can't recheck now. sine I am using the same perfboard...

ugh. I finished it all, tested...didn't work. The amplitude pot worked fine, but only noise came out I looked for my error and found i used a 47 ohm resistor instead of 47k. careless mistake, but radio shack is closed and it would be great to finish tonight. Is there a way of reconfiguring...

5Khz is a pretty high pitch right? What makes it change? So for clarification, there will be a 33k resistor before the +4.5v gets to pin 7

So it looks like the only difference is some resistors and that added +4.5 volts. What is the Purpose of that? Also i only need a total of 2 33k resistors right? The drawing shows 2 chanes with 2 on each chain, but you only wrote 1 33k on each chains. So I am assuming i only need 2 total

Ok that all makes sense. In the future i may try to make it switch waveforms, maybe some sort of toggle between square, wave and sine, but for now ill keep it simple. For the power supply i was planning on using a Dc 9v jack and just plug it into the wall Thanks