function generator

A

Andrés Valenzuela

Guest
Hi
I wouls like to build an function generator so i can probe my guitar
effects on the oscilloscope, could you give me a circuit please?
i don't wanna use any special IC's
thank you
 
Andrés Valenzuela wrote:
Hi
I wouls like to build an function generator so i can probe my guitar
effects on the oscilloscope, could you give me a circuit please?
i don't wanna use any special IC's
thank you
Click to expand...
How about one made with tubes? Seriously, what is a special IC? Do
you always do things the hard way? ;-)

--
John Popelish
 
with no special IC I mean these ic that are very hard to find
i just want some sine, maybe square wave too, that's all i need,
i would like to set the frecuency too, but preferently i want 1khz
that's all
 
Andrés Valenzuela wrote:
with no special IC I mean these ic that are very hard to find
i just want some sine, maybe square wave too, that's all i need,
i would like to set the frequency too, but preferently i want 1khz
that's all
Click to expand...
The Maxim Max038 is a function generator on a chip.
http://www.maximic.com/ See if they have a distributor near you.

--
We now return you to our normally scheduled programming.

Take a look at this little cutie! ;-)
http://home.earthlink.net/~mike.terrell/photos.html

Michael A. Terrell
Central Florida
 
Andrés Valenzuela wrote:
with no special IC I mean these ic that are very hard to find
i just want some sine, maybe square wave too, that's all i need,
i would like to set the frecuency too, but preferently i want 1khz
that's all
Click to expand...
Sine wave:

http://home.att.net/~theremin1/Circuit_Library/twin_t_oscillator.html
http://www.discovercircuits.com/O/o-sine.htm
http://www.ti.com/sc/docs/apps/msp/journal/aug2000/aug_07.pdf
http://www.rlocman.com.ru/en/out.htm?cg=11

Square wave:

http://www.discovercircuits.com/O/o-sqwave.htm
http://www.electronics123.com/amazon/datasheet/k111.pdf
http://www.pcbcafe.com/BOOKS/SpiceHandBook/09_chapter08-04.php

Google is great.

--
John Popelish
 
"Andrés Valenzuela" <avr@netexplora.com> wrote in message
news:bua7k7$nj1$1@news1.nivel5.cl...
Hi
I wouls like to build an function generator so i can probe my guitar
effects on the oscilloscope, could you give me a circuit please?
i don't wanna use any special IC's
thank you
Click to expand...
This one comes with its own power supply and function generator chip. It
would probably be fun to build, and get you what you need without false
starts.

http://store.yahoo.com/webtronics/kit10120fung.html

I haven't built it myself.

Regards,
Bob Monsen
 
Andrés Valenzuela <avr@netexplora.com> wrote in news:bua7k7$nj1$1
@news1.nivel5.cl:

Hi
I wouls like to build an function generator so i can probe my guitar
effects on the oscilloscope, could you give me a circuit please?
i don't wanna use any special IC's
thank you
Click to expand...
Easy and cheap to build :http://members.shaw.ca/roma/thirteen.html
roma
 
"Andrés Valenzuela" <avr@netexplora.com> wrote in message
news:bua7k7$nj1$1@news1.nivel5.cl...
Hi
I wouls like to build an function generator so i can probe my guitar
effects on the oscilloscope, could you give me a circuit please?
i don't wanna use any special IC's
thank you
Click to expand...

heres a very simple function generator using opamps. I used a TLO-72
but you could use a couple of 741's too if you got them hanging
around. I think they'll do fine.

The first part is a non inverting schimtd trigger used to generate the
square wave, the second part is an integrator which will convert your
sqaure wave into a triangular wave. then add a couple of filter
sections to get the sine wave. if you dont need the triangular wave
then you can skip it and just add more filters and get your sine wave
directly out of the square wave.


note: This is for a 1000hz generator change resistor
and capacitor values as needed.

you will need at least 3 filters to get a decent
sine wave maybe even 4 or more for a really clean
wave.
 
Please, post schematics to alt.binaries.schematics.electronic
 
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