Re: Hmevision ir transmitter

["andy_powell_is" <ukha@xxxxxxx>]

--- 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
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> >
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> >
> >

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