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Author Topic: zero crossing square wave  (Read 3798 times)

dapmanz

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zero crossing square wave
« on: August 24, 2007, 11:02:07 AM »
Hi,
My XM10E is not generating the correct zero crossing detect signal. When this signal was viewed from the oscilloscope, i obtained a signal with 20ms period ( i'm working on 50Hz) but the amplitude was 0.1V. Also, the shape was not square.
Dapmanz.
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Charles Sullivan

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    • HEYU - X10 Automation for Linux, Unix, and Mac OSX
Re: zero crossing square wave
« Reply #1 on: August 24, 2007, 12:04:27 PM »
Quote from: dapmanz on August 24, 2007, 11:02:07 AM
Hi,
My XM10E is not generating the correct zero crossing detect signal. When this signal was viewed from the oscilloscope, i obtained a signal with 20ms period ( i'm working on 50Hz) but the amplitude was 0.1V. Also, the shape was not square.
Dapmanz.


According to the specs, this is an open collector circuit and you need a pullup resistor.  If you already have this in your circuitry, your XM10E is probably defective.

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Yesterday it worked.
Today it doesn't work.
X10 on Windows is like that.

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dapmanz

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  • Posts: 4
Re: zero crossing square wave
« Reply #2 on: August 29, 2007, 08:45:23 AM »
Thanks Charles
I've modified my circuit with a 10k resistor. I obtained the expected 50Hz square wave.
Dapmanz
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