From: "Tim Jacobs"
Subject: Re: PWM demodulator
Date: Thu, 14 Nov 2002 11:03:07 -0000
Organization: Computer Sciences Corporation
NNTP-Posting-Date: Thu, 14 Nov 2002 11:03:09 +0000 (UTC)
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X-Original-Trace: 14 Nov 2002 11:02:38 GMT, basit47307371.basldn.gecm.com
If you can use a microcontroller, a PIC12C508 (8-pin, no external clock)
could easily time the PWM output from the RX and provide the outputs you
need. The 12C508 is also available in a surface mount package. Is that
It's pretty easy to get on/off out of a PWM servo output signal because
on/off channels usually send either 1ms or 2ms pulses depending on the state
of the switch. You start a timer when the pulse starts, then check the
input 1.5ms later. The result determines your output.
These are my views, not those of my employer.
"Edwin" wrote in message
> Basically, I am thinking of using the signal from the PCM S
> receiver(JR) AUX 1 via a ON/OFF switch at the transmitter side to
> control a remote switch that will disable the power in event the
> system when unstable. However, due to the power and space limitation,
> I cannot use another servo.
> Can anyone shed a light as to how to design a simpler PWM demodulator
> so that I can get a high or low signal to drive my switch.
> Thank you and best regards