Re: Re: Hmevision ir transmitter

["Ian Davidson" <ian@xxxxxxx>]

Andy

Yes you do need both grounds connected together for reference.

Then try again as my previous message, if still no go then will will
work
through the circuit.

Ian D

----- Original Message -----
From: "andy_powell_is" <ukha@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, May 30, 2002 11:40 PM
Subject: [ukha_d] Re: Hmevision ir transmitter


> --- In ukha_d@y..., "Ian B" <Ian@M...> wrote:
> > Don't forget to common all the grounds.
> >
>
> Ian,
>
> I'm using 2 separate breadboards with 2 separate PSUs (Homevision
is
> not involved at the mo, I'm just trying to get the circuit right
so
> as not to blow it up) Do I still need to make a link between the
two
> grounds?
>
> I'm not sure I understand the rest of your message...
>
> please engage idiot proof mode :P
>
> Andy
>
> > I would suggest you do this in stages and the first one is to
> connect the
> > 2N2222 base to the HV +ve IR output via a resistor, something
like
> 1k should
> > do it. Then connect the collector to +ve via a resistor and the
IR
> LED, 100
> > ohms should be good. Connect the emitter to the ground of the
power
> supply.
> > With the HV ground and power supply ground connected try a test
IR
> burst. If
> > the equipment does not respond then change the LED for a
visible
> one and see
> > if it flashes dimly?
> >
> > Let me know
> >
> > Ian
> >
> > >-----Original Message-----
> > >From: andy_powell_is [mailto:ukha@b...]
> > >Sent: 30 May 2002 19:59
> > >To: ukha_d@xxxxxxx
> > >Subject: [ukha_d] Re: Hmevision ir transmitter
> > >
> > >
> > >
> > >Ian,
> > >
> > >I'm actually stubling at the first hurdle here...
> > >
> > >I have :
> > >
> > >One one breadboard with a 5v supply a BC182, C is connected
to +5v
> > >via a resistor, B is connected to Ground (via a push switch)
and E
> is
> > >connected to the B of a 2N2222 on another breadboard with 5v
supply
> > >(spearate from the first one). The C of the 2N2222 is
connected to
> 2
> > >LED's in series with a 220ohm resistor and the E is connected
to
> the
> > >ground of the supply on this board.
> > >
> > >I expected the LED's to light up - guess what? It does
nothing :(
> > >
> > >Any ideas???
> > >
> > >I thought it was the circuit I'd drawn (uploaded to the files
area)
> > >before...
> > >
> > >Andy :(
> > >
> > >
> > >
> > >
> > >
> > >--- In ukha_d@y..., "Ian B" <Ian@M...>
wrote:
> > >>
> > >> > I noticed that you said you were using 3 port pins,
which
> sounds
> > >> > better than using 8...
> > >>
> > >> Andy
> > >>
> > >> I think Frank has built this round a 3 to 8 decoder
which means
> > >only one
> > >> zone could be active at any on time. Using all 8 pins of
port A
> > >gives you
> > >> any combination you want simultaneously.
> > >>
> > >> Ian B
> > >
> > >
> > >
> > >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
> > >
> > >Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
> > >
>
>
>
> 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
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>




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

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.