DIGITAL FUZZ

[loss1234]

anyobyd ever made the digital fuzz?

first off, i will refer to this so people know what i am talking about:

http://experimentalistsanonymous.com/diy/Schematics/Fuzz%20and%20Fuzzy%20Noisemakers/Digital%20fuzz.bmp



i ordered a bunch of ADC0808 chips to build it but this schematic only uses 20 of the 28 pins !! so i think it is mislabeled.

anybody know if i can make a workaround to still use the ADC's i bought?

or any other cool projects that use ADC0808'a or other AD/DA chips?

thanks

[petemoore]

i ordered a bunch of ADC0808 chips to build it but this schematic only uses 20 of the 28 pins !! so i think it is mislabeled.
  I guess it works as shown.
  Based solely on the assumption that Experimentalists Anonymous apparently put that up.
 

[anchovie]

The ADC0808 is indeed a DIP28 chip and wouldn't work using just the 20 pins shown in the schematic.

I think the part is mislabelled and should be one of these: http://www.national.com/ds/DC/ADC0801.pdf

The extra pins on an ADC0808 appear to be for a multiplexer. You'd have to study the datasheets for both chips to see if you could make one work without the multiplexer functionality.

[Sir H C]

That is my design, it works as shown, but I think that I used a different ADC.   In general with the 0808, you just set the multiplexor to the input 0 and then http://www.national.com/ds/DC/ADC0801.pdf shows the pins that equate to the one shown (I don't know why I got the part number wrong, that was a while back).  PM me and I can get it all sussed out for you as it looks like this one does need an external clock.  Again I apologize for the error (I think I corrected it somewhen/somewhere but I admit to usually being a seat-of-the-pants designer of such things).

[caress]

you want to use an ADC0804 and DAC0808