[Hai-users] Somfy blind control

[Dan Hoehnen]

I'll check out Grainger.  The 555 circuit is certainly a possibility.  I
used to do hardware design and prototyping.  But, I'd need to make 38 of
these circuits, which I'm not prepared to do.

Regards,
Dan 

-----Original Message-----
From: Kenneth McLeod [mailto:kmcleod at prodigy.net] 
Sent: Thursday, March 31, 2005 9:32 AM
To: hai-users at tssi.com; dan at customautomationtech.com
Subject: Re: [Hai-users] Somfy blind control


Another good source for timer relays, (and relays of all types) is Grainger,
which may have a branch in your area, or try Grainger.com Their service is
excellent.

If you are inclined to solder up a little something on a small circuit
board, a one-shot timer such as this can be built easily for less than $12
in parts.  The 555 timer (an 8-pin chip) is designed for functions exactly
as this, and all you need is few resistors, capacitor, and a very small
relay to be driven for the contact closure. If you want more details, let me
know.

Ken McLeod
Integrated Home Systems
Eau Claire, WI

>  Message: 4
> Date: Wed, 30 Mar 2005 19:28:31 -0500
> From: "Larry Huppert" <larry.huppert at earthlink.net>
> Subject: Re: [Hai-users] Somfy blind control
> To: <hai-users at tssi.com>
> Message-ID: <001601c53588$91aaa030$0302a8c0 at zurich>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Don't know how to make an OP2 directly have a contact closure for less
than
> 1 sec, but you could have the OP2 drive a 3rd party timer relay which
would
> do it.  Lots of companies make timer relays which work over a wide 
> range
of
> time settings from fractions of a second to hours.  The only downside 
> is that these relays are fairly expensive.  Take a look in the 
> Digi-key or Newark catalogs for these parts.
>
>
> ----- Original Message -----
> From: "Dan Hoehnen" <dan at customautomationtech.com>
> To: <hai-users at tssi.com>
> Sent: Saturday, March 26, 2005 6:50 PM
> Subject: [Hai-users] Somfy blind control
>
>
> > I'd like to use an Omni Pro II in an upcoming project that uses 
> > Somfy
> blind
> > motors.  The Somfy blind interface requires contact closures that 
> > last
> less
> > than 0.5 seconds.  The Somfy web site even has a technical document
> showing
> > the connection between a Somfy DC5 blind controller and an Omni.  It
also
> > states a contact closure time of 400ms is needed to perform the UP 
> > and
> DOWN
> > functions.
> >
> > How do I get OP2 outputs to turn on for only 0.4 seconds?  I thought 
> > the Omni outputs had a resolution of 1 second.
> >
> > Regards,
> > Dan Hoehnen
> > Custom Automation Technologies, Inc.
> > http://www.customautomationtech.com
> > 614-939-iCAT (4228)