Re: ir transmitter some success

["andy_powell_is" <ukha@xxxxxxx>]

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 you
> > > > 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
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> >
> >
> >
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