vclfo3a

[tomg]

I started something new. For now I'll call it the m5. I had to do something
for that very nice new Kimball keyboard I scavenged. I'm building two for
the new synth. So I will be posting the pcb in the cookbook when I get it
done. It's a little bit complicated for an lfo. 

Starting at the top of the schematic. 
Is a 74LS90 staircase generator. we take the bcd out attach it to a simple
resistor dac and the output is a nice even staircase not musically scaled 
but terrific for those video game sounds. Below the 74LS90 is the 13600/700
vclfo. The vclfo outputs square and tri waves. Below the vclfo is the
3080 s&h circuitry including a npn/opamp noise source. to the right is
 the tri to saw converter and inverter. Any one of these wave forms can be 
selected to go through the final vca to the right of the select switch.

What did we say the limit on attachments was? This is 14K. Also 
now in the cookbook. Maybe I shouldn't attach stuff like this at all? 
Just link to my page and save attachments for q&a/example stuff.

http://www.mindspring.com/~vco/cbook/cookbook.html

-tg

This is copyright EFM 1999. It is freely distributable except to, in 
or for Electronotes in any way. Destroy this immediately if you are 
involved with the distribution of Electronotes.
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Mad Mouse - PC Board - Analog For Everybody
http://www.mindspring.com/~vco/madm/mm_order.html
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