Can someone shed some light

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#2172

From: LBNote
Date: Wed, 14 Jan 2004 01:22

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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...

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From: "LBNote" <lbonnell@ozemail.com.ua>
Newsgroups: sci.electronics.design,aus.electronics
Subject: Can someone shed some light
Date: Wed, 14 Jan 2004 11:22:20 +1000
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