Re: Re: ir transmitter some success

["Ian Davidson" <ian@xxxxxxx>]

Hi All

Well done to everyone that has had some success with there circuits, I've been to busy to get to the computer. It seems there were some problems but = I
think Ian B has sorted it. I'll Stand back a little and let you guy's with<= BR> HV decide on the port etc but just ask if I can help out in anyway.

The earlier post I saw ref transistors, I simple explanation is that a
Transistor is basically two diodes. As I mentioned before the current flows=
through the base and out the emitter (one of the diodes). The current is fa= r
less than when the circuit is wired fully but is enough, in that circuits case to drive the next transistor.

I'm off to take a bath, Been at Alton Towers all day and I'm  Kna=A3%= =A3^%ed.

Ian D
----- Original Message -----
From: "Ian B" <Ian@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Sunday, June 02, 2002 5:45 PM
Subject: RE: [ukha_d] Re: ir transmitter some success


> Right then. Another circuit posted. Basically it is Circuit A with a twist.
> Will work with the components you have already Andy. I will try and th= ink
of
> a better one soon but am up to my ears at the moment.
>
> Ian
>
> >-----Original Message-----
> >From: Ian B [mailto:Ian@xxxxxxx]
> >Sent: 02 June 2002 15:35
> >To: ukha_d@xxxxxxx > >Subject: RE: [ukha_d] Re: ir transmitter some success
> >
> >
> >Not exactly bad. I think the later designs running off PortC are b= etter
as
> >it does not involve negative logic i.e. '0' is off and 1 is on. At= this
> >stage when most of this stuff is on breadboard I would go to PortC= . The
> >relay ports are of more use for other things to some as well given= their
> >better spec for current switching. For this circuit we are using milliamps
> >so it is of no concern.
> >
> >I have just looked at the manual (for the first time and as I had = to
unbury
> >it) and it looks as though HV switches the +ve 5v. Can someone
> >confirm this.
> >If so the circuit(s) will need revising as they are designed to sw= itch
the
> >ground. It is not a big issue but we must look at it now not later= . I
will
> >post alternative circuits on my site ASAP.
> >
> >Ian
> >
> >>-----Original Message-----
> >>From: andy_powell_is [mailto:ukha@xxxxxxx]
> >>Sent: 02 June 2002 14:46
> >>To: ukha_d@xxxxxxx > >>Subject: [ukha_d] Re: ir transmitter some success
> >>
> >>
> >>
> >>Does sthat still mean the first design is 'bad' Ian? or does t= hat
> >>make it 'fixed'
> >>
> >>Andy
> >>
> >>
> >>--- In ukha_d@y..., "Ian B" <Ian@M...> wrote:<= BR> > >>> You're right Frank. I was going on memory from when I did= my relay
> >>board
> >>> mark 1 and got it wrong. Checked the help files after pre= ssing send
> >>Dohh!
> >>>
> >>> Ian B
> >>>
> >>> >-----Original Message-----
> >>> >From: Frank Mc Alinden [mailto:armagh@b...]
> >>> >Sent: 02 June 2002 13:52
> >>> >To: ukha_d@xxxxxxx > >>> >Subject: Re: [ukha_d] Re: ir transmitter some success=
> >>> >
> >>> >
> >>> >Sorry Ian
> >>> >         = ;       Port A  does switch to ground . = The chip is a
> >>uln2803.
> >>> >Checked the manual  to be sure . Also im using t= he mux pins as
> >>being driven
> >>> >by open collector .
> >>> >Frank Mc
> >>> >
> >>> >----- Original Message -----
> >>> >From: "Ian B" <Ian@M...>
> >>> >To: <ukha_d@y...>
> >>> >Sent: Sunday, June 02, 2002 10:35 PM
> >>> >Subject: RE: [ukha_d] Re: ir transmitter some success=
> >>> >
> >>> >
> >>> >> Andy
> >>> >>
> >>> >> I think the logic behind this circuit is flawed = which is
> >>probably a case
> >>> >of
> >>> >> too much advice from different sources, myself i= ncluded. Using
> >>the
> >>> >> components you have already you could make the '= More' circuit on
> >>> >breadboard
> >>> >> as per www.mollyology.com then HV IR. I would re= commend you do
> >>this.
> >>> >>
> >>> >> Problems with the one mentioned below are
> >>> >> a) I don't think PORTA sinks to ground. It is a = relay port which
> >>means it
> >>> >> simply switches between contacts. You could then= connect one of
> >>those to
> >>> >> ground to achieve what you want but this is not = very elegant.
> >>> >> b) The ground in this case (not the HV port one)= would be the IR
> >>ground
> >>> >> which would turn on and off the LEDs. It would b= e better and
> >>safer if the
> >>> >> ground was direct to ground controlled by a tran= sistor which in
> >>> >turn would
> >>> >> be controlled by the IR port.
> >>> >>
> >>> >> In all honesty the circuit on my web page is ver= y similar but
> >>> >works around
> >>> >> the problems above.
> >>> >>
> >>> >> Sorry.............
> >>> >>
> >>> >> Ian B
> >>> >>
> >>> >> >-----Original Message-----
> >>> >> >From: andy_powell_is [mailto:ukha@b...]
> >>> >> >Sent: 02 June 2002 12:57
> >>> >> >To: ukha_d@xxxxxxx > >>> >> >Subject: [ukha_d] Re: ir transmitter some su= ccess
> >>> >> >
> >>> >> >
> >>> >> >
> >>> >> >Frank,
> >>> >> >
> >>> >> >No, those seems to be very different from th= e original...
> >>> >> >
> >>> >> >If you look at http://www.automated.it/homevision/HVIR2.jpg
> >>> >> >
> >>> >> >
> >>> >> >that's what I'm doing, tho the Hovevision po= rt ground isn't in
> >>the
> >>> >> >circuit... I've just tested on my circuit an= d 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&q= uot; <armagh@b...> wrote:
> >>> >> >> Hi Andy
> >>> >> >>      &nbs= p;       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" <uk= ha@b...>
> >>> >> >> To: <ukha_d@y...>
> >>> >> >> Sent: Sunday, June 02, 2002 9:18 PM
> >>> >> >> Subject: [ukha_d] Re: ir transmitter so= me 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 2n= d 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 spen= t 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 phot= os on Marks Website ? if so
> >>how?
> >>> >> >> > > Good Luck
> >>> >> >> > >
> >>> >> >> > > Frank Mc
> >>> >> >> > > ----- Original Message -----<= BR> > >>> >> >> > > From: "andy_powell_is&qu= ot; <ukha@b...>
> >>> >> >> > > To: <ukha_d@y...>
> >>> >> >> > > Sent: Sunday, June 02, 2002 7= :18 PM
> >>> >> >> > > Subject: [ukha_d] Re: ir tran= smitter some success
> >>> >> >> > >
> >>> >> >> > >
> >>> >> >> > > > Good stuff Frank... at t= he moment I am just using this
> >>to
> >>> >> >learn,
> >>> >> >> > in
> >>> >> >> > > > the end I'll probably en= d up using one of the designs
> >>from you
> >>> >> >> > > > experts...
> >>> >> >> > > >
> >>> >> >> > > > I've had a little brainw= ave here too... before
> >>connecting to
> >>> >> >> > > > Homevision I'm actually = going to sacrifice a basic
> >>stamp..
> >>> >> >(well
> >>> >> >> > > > sacfrifice is'tn the rig= ht 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 c= urrent draw before the final
> >>> >> >connection..
> >>> >> >> > > >
> >>> >> >> > > > Obviously this is the fi= nal test before connecting to
> >>> >> >homevision..
> >>> >> >> > > > before all that I need t= o take some measurements....
> >>but I
> >>> >> >have
> >>> >> >> > > > transferred the first bi= t from  breadboard to
> >>> >> >stripboard... :D :D
> >>> >> >> > > >
> >>> >> >> > > > and it works!! :D .. I'm= just using this one really as
> >>> >> >> > layout...and
> >>> >> >> > > > testing, I need to compr= ess  it really...
> >>> >> >> > > >
> >>> >> >> > > > I also think I have got = it down to about 512ma total of
> >>8 X 9
> >>> >> >> > leds, i
> >>> >> >> > > > think by chance I manage= d 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 wil= l be right beside the internal
> >>IR
> >>> >> >> > receiver of
> >>> >> >> > > > any kit) resistors for t= hem and the visible leds have
> >>3.9k
> >>> >> >> > resistors
> >>> >> >> > > > and are still fairly bri= ght... (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..., &quo= t;Frank Mc Alinden" <armagh@b...>
> >>wrote:
> >>> >> >> > > > > Hi Andy , Ian + Ian=
> >>> >> >> > > > >   &n= bsp;            = ;             H= ad some success today
> >>with the
> >>> >> >8
> >>> >> >> > zone
> >>> >> >> > > > ir controller . I decide= d to bypass the opto connected
> >>to
> >>> >> >> > incoming ir
> >>> >> >> > > > signal from Hv to confir= m my suspicions. Tried it again
> >>and it
> >>> >> >> > worked
> >>> >> >> > > > but only with two ir led= s inserted in the Zone
> >>Splitter .
> >>> >> >Looked
> >>> >> >> > at
> >>> >> >> > > > my schematic and realise= d it was slightly different to
> >>my
> >>> >> >homebrew
> >>> >> >> > > > circuit. In my homebrew = unit the driver transistors were
> >>> >> >connected
> >>> >> >> > > > common emitter but my ne= w circuit was common
> >>collector .Re
> >>> >> >did the
> >>> >> >> > > > driver transistors and t= ried again. Now works with all
> >>8 ir
> >>> >> >leds
> >>> >> >> > in
> >>> >> >> > > > Zone Splitter on all Zon= es . The range is approx 15ft
> >>and i
> >>> >> >> > monitored
> >>> >> >> > > > the current which was ap= prox  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 o= k. Would still like to use opto
> >>> >> >isolation
> >>> >> >> > on
> >>> >> >> > > > the incoming ir ,will or= der 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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> >>> >>
> >>> >
> >>> >
> >>> >
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> >>> >
> >>> >
> >>
> >>
> >>
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> >
> >
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