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Re: Re: Hmevision ir transmitter



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 >
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>
>
>



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