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more than 12 channels

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more than 12 channels
dan Offline
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#16
2017 Jun 10, 01:11 AM
I think I found a solution to the power up problem.

All you need to do is add a 10k pull up resistor from pin_sr_noe (pin 11 on the Pi) to the 5v line.
Actually on the shift register diagram it would be between the purple input wire from the Pi to the 5V rail.

I tried it here and it is working using a SainSmart relay board.

I still need to do some further testing. It may be possible to enable a pull up on the Pi through software. I'll post back after I test. Short on time riight now

Dan
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Messages In This Thread
more than 12 channels - by joeb@drumwerx.com - 2017 Mar 27, 02:13 AM
RE: more than 12 channels - by dan - 2017 Mar 27, 05:21 PM
RE: more than 12 channels - by 22ndst - 2017 Jun 09, 12:23 AM
RE: more than 12 channels - by joeb@drumwerx.com - 2017 Mar 28, 12:00 AM
RE: more than 12 channels - by dan - 2017 Mar 29, 01:44 AM
RE: more than 12 channels - by FrancoisRabe - 2017 Mar 28, 03:06 PM
RE: more than 12 channels - by joeb@drumwerx.com - 2017 Mar 28, 06:55 PM
RE: more than 12 channels - by joeb@drumwerx.com - 2017 May 15, 09:28 PM
RE: more than 12 channels - by dan - 2017 May 15, 11:04 PM
RE: more than 12 channels - by joeb@drumwerx.com - 2017 May 15, 11:54 PM
RE: more than 12 channels - by joeb@drumwerx.com - 2017 May 16, 01:15 AM
RE: more than 12 channels - by dan - 2017 May 16, 03:23 PM
RE: more than 12 channels - by joeb@drumwerx.com - 2017 May 17, 12:29 AM
RE: more than 12 channels - by dan - 2017 Jun 09, 03:49 AM
RE: more than 12 channels - by 22ndst - 2017 Jun 10, 12:26 AM
RE: more than 12 channels - by dan - 2017 Jun 10, 01:11 AM
RE: more than 12 channels - by davidjustin - 2017 Jun 10, 06:50 AM
RE: more than 12 channels - by dan - 2017 Jun 10, 03:54 PM
RE: more than 12 channels - by 22ndst - 2017 Jun 10, 04:34 PM
RE: more than 12 channels - by dan - 2017 Jun 10, 04:55 PM
RE: more than 12 channels - by 22ndst - 2017 Jun 10, 07:00 PM
RE: more than 12 channels - by dan - 2017 Jun 10, 07:15 PM
RE: more than 12 channels - by ruffledrooster - 2017 Jun 16, 02:43 PM
RE: more than 12 channels - by dan - 2017 Jun 17, 04:11 AM
RE: more than 12 channels - by ruffledrooster - 2017 Jun 19, 05:31 PM
RE: more than 12 channels - by dan - 2017 Jun 19, 09:09 PM
RE: more than 12 channels - by ruffledrooster - 2017 Jun 19, 09:43 PM
RE: more than 12 channels - by pansegrau - 2017 Aug 15, 01:44 PM
RE: more than 12 channels - by dan - 2017 Jun 20, 12:38 AM
RE: more than 12 channels - by astrogerard - 2017 Jun 21, 03:23 PM
RE: more than 12 channels - by dan - 2017 Aug 15, 03:16 PM

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