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Re: ir transmitter some success


  • To: ukha_d@xxxxxxx
  • Subject: Re: ir transmitter some success
  • From: "andy_powell_is" <ukha@xxxxxxx>
  • Date: Sun, 02 Jun 2002 12:11:40 -0000
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

Frank, Ian,

So that http://www.automated.it/homevision/HVIR2.jpg circuit is
correct then? and I use the Homevison A ports to ground the zones i
do NOT want a signal sent to?

Andy


--- In ukha_d@y..., "Frank Mc Alinden" <armagh@b...> wrote:
> Andy
>         Whats happening is that with +5v on the first transistor
thru
> resistor? there is enough current  going into the next transsitor
to drive
> it on. Also i believe HV sends a +5v switching signal. Port A
outputs do
> switch to ground (open collector).
>
> Frank
> ----- Original Message -----
> From: "andy_powell_is" <ukha@b...>
> To: <ukha_d@y...>
> Sent: Sunday, June 02, 2002 9:57 PM
> Subject: [ukha_d] Re: ir transmitter some success
>
>
> >
> > Frank,
> >
> > No, those seems to be very different from the original...
> >
> > If you look at http://www.automated.it/homevision/HVIR2.jpg
> >
> >
> > that's what I'm doing, tho the Hovevision port ground isn't in the
> > circuit... I've just tested on my circuit and if I put a ground
> > connectoin in where it is on the diagram it fixes the probelm...
so
> > the question is does Port A go to ground? is this safe to do?
> >
> > Andy
> >
> >
> >
> > --- In ukha_d@y..., "Frank Mc Alinden" <armagh@b...> wrote:
> > > Hi Andy
> > >              The other guys must be busy,so i,ll have a go, Are
you
> > using
> > > one of the circuits  Ian B has on his site . If  so which one
> > > Frank mc
> > > ----- Original Message -----
> > > From: "andy_powell_is" <ukha@b...>
> > > To: <ukha_d@y...>
> > > Sent: Sunday, June 02, 2002 9:18 PM
> > > Subject: [ukha_d] Re: ir transmitter some success
> > >
> > >
> > > >
> > > > Frank Ian, Ian,
> > > >
> > > > I've actually found a problem :(
> > > >
> > > > When +5v is applied to the base of the first transistor, even
if
> > the
> > > > collector is not connected, the 2nd transistor is supplying
> > current
> > > > to the LEDs... I don't understand that. didn't think it should
> > > > happen :(
> > > >
> > > > any ideas
> > > >
> > > > Andy
> > > >
> > > >
> > > > --- In ukha_d@y..., "Frank Mc Alinden" <armagh@b...> wrote:
> > > > > Hi Andy
> > > > >             Isnt it  brill when things go right .Your doing
> > great.
> > > > Good idea
> > > > > about the Basic Stamp. I spent all day yesterday
frustrated .
> > You
> > > > wouldnt
> > > > > learn much if everything went right ,its when it goes wrong
> > thats
> > > > when you
> > > > > learn. Did you post your photos on Marks Website ? if so
how?
> > > > > Good Luck
> > > > >
> > > > > Frank Mc
> > > > > ----- Original Message -----
> > > > > From: "andy_powell_is" <ukha@b...>
> > > > > To: <ukha_d@y...>
> > > > > Sent: Sunday, June 02, 2002 7:18 PM
> > > > > Subject: [ukha_d] Re: ir transmitter some success
> > > > >
> > > > >
> > > > > > Good stuff Frank... at the moment I am just using this to
> > learn,
> > > > in
> > > > > > the end I'll probably end up using one of the designs
>from > > > > > > experts...
> > > > > >
> > > > > > I've had a little brainwave here too... before connecting
to
> > > > > > Homevision I'm actually going to sacrifice a basic stamp..
> > (well
> > > > > > sacfrifice is'tn the right word as it SHOULD be ok
> > afterwards)..
> > > > > >
> > > > > > The Basic stamp can cope with 30ma max per pin and 60ma
per 8
> > > > pins..
> > > > > > which means if i create a fake homevision using the basic
> > stamp I
> > > > can
> > > > > > certainly check on the current draw before the final
> > connection..
> > > > > >
> > > > > > Obviously this is the final test before connecting to
> > homevision..
> > > > > > before all that I need to take some measurements.... but I
> > have
> > > > > > transferred the first bit from  breadboard to
> > stripboard... :D :D
> > > > > >
> > > > > > and it works!! :D .. I'm just using this one really as
> > > > layout...and
> > > > > > testing, I need to compress  it really...
> > > > > >
> > > > > > I also think I have got it down to about 512ma total of 8
X 9
> > > > leds, i
> > > > > > think by chance I managed to get some sensitive ir emitter
> > leds I
> > > > > > need to double check but I think I can get away with
600ohm
> > > > (possibly
> > > > > > more as the emitters will be right beside the internal IR
> > > > receiver of
> > > > > > any kit) resistors for them and the visible leds have 3.9k
> > > > resistors
> > > > > > and are still fairly bright... (again all by chance)
> > > > > >
> > > > > > Part numbers for farnell are:
> > > > > >
> > > > > > 178301 Ir Emitter
> > > > > >
> > > > > > (farnell datasheet
> > http://www.farnell.com/datasheets/5344.pdf )
> > > > > >
> > > > > > 3013900 yellow led
> > > > > >
> > > > > > (no datasheet at farnell but it is at www.marl.co.uk  marl
> > part no
> > > > > > 352-582-20 )
> > > > > >
> > > > > > Andy
> > > > > >
> > > > > >
> > > > > > --- In ukha_d@y..., "Frank Mc Alinden" <armagh@b...>
wrote:
> > > > > > > Hi Andy , Ian + Ian
> > > > > > >                             Had some success today with
the
> > 8
> > > > zone
> > > > > > ir controller . I decided to bypass the opto connected to
> > > > incoming ir
> > > > > > signal from Hv to confirm my suspicions. Tried it again
and it
> > > > worked
> > > > > > but only with two ir leds inserted in the Zone Splitter .
> > Looked
> > > > at
> > > > > > my schematic and realised it was slightly different to my
> > homebrew
> > > > > > circuit. In my homebrew unit the driver transistors were
> > connected
> > > > > > common emitter but my new circuit was common collector .Re
> > did the
> > > > > > driver transistors and tried again. Now works with all 8
ir
> > leds
> > > > in
> > > > > > Zone Splitter on all Zones . The range is approx 15ft and
i
> > > > monitored
> > > > > > the current which was approx  5mA . I set up my Hv ports
thru
> > the
> > > > > > control menu rather than a macro at this stage just to
> > confirm my
> > > > > > hardware was connected ok. Would still like to use opto
> > isolation
> > > > on
> > > > > > the incoming ir ,will order something from rs components.
Now
> > must
> > > > > > update my drawing before i forget.
> > > > > > >
> > > > > > > Frank Mc
> > > > > >
> > > > > >
> > > > > >
> > > > > > For more information: http://www.automatedhome.co.uk
> > > > > > Post message: ukha_d@xxxxxxx > > > > > > Subscribe:  ukha_d-subscribe@xxxxxxx > > > > > > Unsubscribe:  ukha_d-unsubscribe@xxxxxxx > > > > > > List owner:  ukha_d-owner@xxxxxxx > > > > > >
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> > > > > >
> > > > > >
> > > >
> > > >
> > > >
> > > > For more information: http://www.automatedhome.co.uk
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> > > >
> >
> >
> >
> > For more information: http://www.automatedhome.co.uk
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> >


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