zero crossing detector circuit using lojic gates

[on1aag]

Here's another example:

**broken link removed**

on1aag.

 

[BeeBop]

I agree. I have used ExpressPCB for some time now. It was a lot easier to learn than Eagle. The components are easier to manage (at least right now). I downloaded Eagle because a number of people had suggested it and the price was right I'm still working with Eagle, trying to learn the ins and outs. Is there a "sticky" somewhere that could give me some helpful hints? Or maybe a tutorial on-line?

There should be a few tutorials on this page:
**broken link removed**
as well as lots of other helpful hints, etc.

 

[Boncuk]

Here's another example:

on1aag.

Hi on1aag,

do you think the "Trappenhuisautomaat" takes care of zero detection?

It is designed for pure resistive loads like light bulbs in a stair case and so zero detection isn't necessary.

BTW, I've learned some Dutch too. Here's an example and the teacher said it's wrong: "En olifant op en paard", while "En meisje op en paard" is OK for him.

Boncuk

 

[Willbe]

Don't forget computers are individuals. Hug them from time to time to carry on working.

Not if you want to ward off GeekHood.

 

[on1aag]

Hi Hans,

The line synchronisation is needed to reduce the current
consumption of the circuit. The triac is fired with a
short pulse at the right time and at the right angle to
reduce the current consumption to a fraction of the 5 mA
which is needed to trigger the triac at all angles.
The synchronisation also prevents line disturbances when
the load is switched on.
Using a small transformer was out of the question because
those small transformers (< 5 VA) tend to go open circuit
at the primary.
Please bear in mind that this circuit was designed more
than thirty years ago by a newly graduate.

on1aag.