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Subject: Re: [Homebrew_PCBs] Re: New photo of my pcb

From: Stefan Trethan <stefan_trethan@...>
Date: 2004-07-14

..
>
> Hi Esteban,
>
> I'm impressed ! You did a great job.
>
> I really like all the text in copper. Also, the traces look like you
> were able to get good resist.

Looks very clean, yes. Text in copper: i reduced it to almost zero after
getting the two-side component legend "silkscreen" done. you can put much
more
information on it.

>
> If you guys want to keep the discussion about how to set the circuit,
> I think most of us on here would like to 'listen in' and think that
> we would be interested in tuning the circuit.
>

Getting his 2 second oscillation results i think there is not much
tweaking needed.
Hysteresis won't make it better, and a rate component is IMO not helpful
for beginners.
also it must be a very big rate comp. (heating systems are very slow) and
i have
no experience with that, and no time to experiment just now.
The zero crossing detector of the opto "slots" the control input and
prevents too much
oscillations i think.
If a control loop guru is willing to provide assistance i will try
modifications.

ST

> Dave