Re: ir transmitter some success

["andy_powell_is" <ukha@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
> > > > > >
> > > > > >
> > > > > >
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