[chbot] Solid State Relays

[Volker Kuhlmann]

On Sat 08 Aug 2015 09:02:47 NZST +1200, Mark Atherton wrote:

> Just found an interesting site: http://www.bristolwatch.com/ele/triacs2.htm
> 
> includes a schematic of one type
> http://www.bristolwatch.com/ele/img/lewis1.gif
> 
> lots of detail about these magic (or at least mysterious) boxes

Yes very interesting for making one's own SSR (a 100A triac, anyone?).

Does it really help with understanding the SSRs I and others had earlier
though? The datasheet specifies a zero-crossing detector, snubber on the
AC side, and what has to be bipolar (i.e. triac) and not FET
"closed-contact" characteristics. So the principle design is known from
the datasheet. That website doesn't help with details like component
values and exact circuit for a particular SSR.

I don't like the snubber circuit to be always on even when the "relay"
is "off"...

Volker

-- 
Volker Kuhlmann
http://volker.top.geek.nz/	Please do not CC list postings to me.