I'm in the process of creating a device which ultimatly will take an input signal, i.e. a guitar signal, and detect the frequency and ultimatly turn this into a CV (Control Voltage) for an analogue synth. This will allow me to control analogue synths via a guitar.
The first part of my project is simply converting a frequency into a voltage. For this I am using a LM331 chip, right now I have this breadboarded up as per the data sheet instructs in its simple F/V conversion.
Figure 6
http://www.national.com/ds/LM/LM231.pdf
Right now the output is not changing with frequency but remaining at about 13v (I am supplying it with 15v) I am ordering a new chip incase this one has somehow been damaged so hopefully this may recifty this problem.
One problem I am expecting even once I recieve some sort of fairly linear response is delay. There are also going to be many other problems I expect.
I'm hoping someone (or maybe even a few!) will hopefully take some sort of interest in the project and it's progress and maybe even be able to provide some advice when I need it as I am by no means an expert in this area!
One quick question I have been trying to find an answer to for a little while is what is the difference between a LM331N & LM331AN? Don't seem to be able to find any difference?
Thanks for reading!
The first part of my project is simply converting a frequency into a voltage. For this I am using a LM331 chip, right now I have this breadboarded up as per the data sheet instructs in its simple F/V conversion.
Figure 6
http://www.national.com/ds/LM/LM231.pdf
Right now the output is not changing with frequency but remaining at about 13v (I am supplying it with 15v) I am ordering a new chip incase this one has somehow been damaged so hopefully this may recifty this problem.
One problem I am expecting even once I recieve some sort of fairly linear response is delay. There are also going to be many other problems I expect.
I'm hoping someone (or maybe even a few!) will hopefully take some sort of interest in the project and it's progress and maybe even be able to provide some advice when I need it as I am by no means an expert in this area!
One quick question I have been trying to find an answer to for a little while is what is the difference between a LM331N & LM331AN? Don't seem to be able to find any difference?
Thanks for reading!