Anybody know more about electronics than me and want to tell me ... • Aaron Parecki

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Anybody know more about electronics than me and want to tell me why this doesn't work?

Right now, all the pumps turn on when it's first plugged in until the Arduino has a chance to set all the PCF pins LOW.

Wed, Dec 30, 2015 8:29pm -08:00

4 replies 1 mention
Have you written a response to this? Let me know the URL:
- Mark Leavitt markleavitt.com
  
  @aaronpk I'd try adding 4.7K ohm pull-up resistors to the i2c lines. One from Vcc to SDA, one from Vcc to SCL. Good luck!
  
  Mon, Jan 4, 2016 12:23am +00:00 (via brid-gy.appspot.com)
- Jose Vazquez littlemustard.com
  
  @aaronpk you might want to use a resistor to pull one of those lines to ground initially to see if that gives you what you want.
  
  Sat, Jan 2, 2016 2:29am +00:00 (via brid-gy.appspot.com)
- Jose Vazquez littlemustard.com
  
  @aaronpk I haven’t done any hardware work in a long while so I’m not sure, but I think the - for starts with tri-stated outputs...
  
  Sat, Jan 2, 2016 2:28am +00:00 (via brid-gy.appspot.com)
- Justin Miller justinmiller.io
  
  @aaronpk paging @josevazquez
  
  Thu, Dec 31, 2015 4:48am +00:00 (via brid-gy.appspot.com)
Other Mentions
- PORTLAND & OREGON pinterest.com/thecityofroses
  
  Portland Peeps Top story: Anybody know more about electronics than me and want … aaronparecki.com/notes/2015/12/…, see more tweetedtimes.com/v/1662?s=tnp
  
  Thu, Dec 31, 2015 5:58am +00:00 (via brid-gy.appspot.com)

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