Contact | X10.com
Please login or register.

Login with username, password and session length

Author Topic: zero crossing square wave  (Read 4176 times)

dapmanz

  • Newbie
  • Helpful Post Rating: 0
  • Posts: 4
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.
Logged

Charles Sullivan

  • Hero Member
  • *****
  • Helpful Post Rating: 94
  • Posts: 1565
    • 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.

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

HEYU - X10 Automation for Linux, Unix, and Mac OS X     http://www.heyu.org

dapmanz

  • Newbie
  • Helpful Post Rating: 0
  • 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
Logged
 

X10.com | About X10 | X10 Security Systems | Cameras| Package Deals
© Copyright 2014-2016 X10.com All rights reserved.