Re: Hmevision ir transmitter

["andy_powell_is" <ukha@xxxxxxx>]

Ok,

I've linked the two grounds together and set up as per your last 
message.. still no joy.. :(

sob, sob,

Andy

--- In ukha_d@y..., "Ian Davidson" <ian@g...> wrote:
> 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@b...>
> To: <ukha_d@y...>
> 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
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> > > >
> > > >
> >
> >
> >
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