Des Bromilow wrote:

>The other option is a variation on Roman Black's BTC method (which incidently I still haven't got working, but I suspect the problems lay within my code and cct)
>
Oh that's indeed an interesting scheme.
I guess you can even improve it by allowing the output pin go into
tristate (switch to input).

But what I had in mind was feedback of the integrated signal.
I expect to need much less filtering then with pwm.
So I can achieve high frequency spikes.

I've just a quick test and it seems to work, although I've to find the
correct values.
I'm also not sure if the results are better then with plain pwm.

Stef

>
>Des
>
>
>
>>>>dvanhorn@CEDAR.NET 8/05/03 8:04:30 am >>>
>>>>
>>>>
>At 11:58 PM 5/7/2003 +0200, Stef wrote:
>
>
>>hi All,
>>
>>I wondered if it was possible to create a DAC with just 1 ADC pin.
>>The reason is that I have just a few pins and pwm is too slow.
>>
>>
>
>With only one pin, AFAIK PWM is the only choice you have.
>
>--
>http://www.piclist.com hint: PICList Posts must start with ONE topic:
>[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>
>________________________________________________________________________
>This email has been scanned for viruses by the CITEC Email Anti-Virus service powered by MessageLabs. For more information on a proactive email anti-virus service working around the clock, around the globe, visit www.citec.com.au
>________________________________________________________________________
>
>
>________________________________________________________________________
>This email has been scanned for viruses by the CITEC Email Anti-Virus service powered by MessageLabs. For more information on a proactive email anti-virus service working around the clock, around the globe, visit www.citec.com.au
>________________________________________________________________________
>
>--
>http://www.piclist.com hint: PICList Posts must start with ONE topic:
>[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>
>
>

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads