Simple 8-bit D-A / load meter?

Gordon JC Pearce gordonjcp at gjcp.net
Fri Dec 2 03:49:28 CST 2005


Ethan Dicks wrote:
> On 12/1/05, Gordon JC Pearce <gordonjcp at gjcp.net> wrote:
> 
>>Ethan Dicks wrote:
>>
>>>... where I thought things were, but I appear to have lost an old file
>>>that described how to make a simple D-A that one could hang off of an
>>>8-bit I/O port to generate a voltage from approx 0 VDC to +5VDC.  Does
>>
>>Off the top of my head, look in the top left bit of a TB303 circuit
>>diagram where the 7-bit converter to generate the VCO control voltage
>>is.  Googling for "tb303.gif" should bring it up.
> 
> 
> I did eventually find that at
> 
> http://www.hylander.us/images/schematics/roland/tb303.gif
> 
> Thanks for the hint.

:-) I'm sure googling for "covox speech thing" or something would have 
turned up exactly what you were after but I had just been looking at 
that very thing earlier in the day...

Gordon.



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