555 + transistor VCO

[Bjorn Julin]

Does it absolutely have to be a 555?
If not you could try BJ's "famous" 4046 design no1.
Trow away all the stuff exept IC3a,R13,R11,C2
and then you have a wery nice SAW OSC.

http://home.swipnet.se/~w-133242/4046.htm

Reg
BJ

>From: Paul Perry <pfperry at melbpc.org.au>
>To: synth-diy at node12b53.a2000.nl
>Subject: 555 + transistor VCO
>Date: Fri, 29 Sep 2000 22:35:54 +1000
>
>I seem to remember a simple 555 sawtooth VCO using
>a transistor as a constant current source to
>straighten out the saw. Any pointers? Cant find it in my
>files..
>I'm just looking for a very simple VCO saw, need not be
>at all accurate.
>
>paul perry melbourne australia
>

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