🚀 go-pugleaf

"Ken Taylor" <ken123@xtra.co.nz> wrote in message
news:bu26ge$co94h$1@ID-76636.news.uni-berlin.de...
> "LBNote" <lbonnell@ozemail.com.ua> wrote in message
>
news:400499cd$0$893$61c65585@uq-127creek-reader-02.brisbane.pipenetworks.com.au...
> > Hi,
> >
> > Here is a basic description of the circuit,
> > PIC16F628
> > UHF Receiver Module @ ~433Mhz
> > http://www.computronics.com.au/module/txrxpair/txrx_data.pdf
> > 1 LED
> > 1k Resister
> > 5 Volt regulator, plus 22mf and 100nf caps
> >
> > I have the PIC simply blinking the LED ~ every 200ms
> > and the UHF module data output connected to my scope
> >
> > What I notice is that the UHF data output swings along with the LED, I
> mean
> > instead of just showing normal garbage as is the case when no data is
> being
> > transmitted.
> >
> > Problem is NOT present when the LED is removed from the circuit
> >
> > The module still seems to recover data though.
> > Can someone give me there thoughts on what's happening, I understand
that
> > something is causing interference,
> >
> > How can I stop this ?
> >
> >
> > Lorne...
> >
> Do you have good supply bypassing on the PIC? Nice and close to the
device?
> Also for the module.
>
> Ken
>
>
Thanks for your help Ken,

On the UHF module I have a 2.2uf tant and a 100nf  close as I can,  but
nothing on the PIC,

Will give that a try tonight, will just the 100nf do or should I use the 2.2
mf tant as well or other values I'm not sure, I don't even know what science
to use to find out the correct values.  I just borrowed those values from
another (Similar ) circuit.


Lorne...