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by nickhills
Mon Dec 09, 2013 9:30 am
Forum: HATs and other add-ons
Topic: PiFace outputs to Drive 8 relays
Replies: 20
Views: 8742

Re: PiFace outputs to Drive 8 relays

Yes, its all Python.

I have posted a bit of an update on my blog here:
http://nickhills.com/wp/2013/12/raspber ... ontroller/

This shows how I have evolved the project into my Christmas Lights Controller.
by nickhills
Sat Oct 05, 2013 9:22 pm
Forum: Troubleshooting
Topic: IOError: [Errno 2] missing GPIO25
Replies: 4
Views: 1662

Re: IOError: [Errno 2] missing GPIO25

I have exactly the same issue, but i cant figure out what is causing this.

Did you solve the problem?
by nickhills
Mon Apr 15, 2013 11:23 pm
Forum: HATs and other add-ons
Topic: PiFace outputs to Drive 8 relays
Replies: 20
Views: 8742

Re: PiFace outputs to Drive 8 relays

Right now I have two power supplies, but in the video they were running from the same PSU. Power was supplied to the +5v and Gnd Connector on the PiFace (i don't use the micro USB at all) and to pins GND & JDVCC of the jumper header - I removed the jumper completely. (the VCC pin is NOT connected) O...
by nickhills
Mon Apr 15, 2013 7:10 pm
Forum: HATs and other add-ons
Topic: PiFace outputs to Drive 8 relays
Replies: 20
Views: 8742

Re: PiFace outputs to Drive 8 relays

Hi guys,

I have mine too, and it works perfectly.

Triggers on Low, so can be interfaced directly with the PiFace outputs. - I'm using the additional power supply (remove the jumper, and send 5v on pins 1&3) instead of relying on the Pi-face.

I have a video i can post if anyone wants to see!
by nickhills
Wed Apr 10, 2013 11:56 am
Forum: HATs and other add-ons
Topic: PiFace outputs to Drive 8 relays
Replies: 20
Views: 8742

Re: PiFace outputs to Drive 8 relays

Gordon whilst I fully appreciate your suggestion, and I broadly understand your last sentence, I wouldn't have a clue where to start with building my own. Its been over 10 years since I have done any electronics, (but its slowly starting to come back :) I bought the PI-Face to see if i could drive s...
by nickhills
Tue Apr 09, 2013 6:16 am
Forum: HATs and other add-ons
Topic: PiFace outputs to Drive 8 relays
Replies: 20
Views: 8742

Re: PiFace outputs to Drive 8 relays

Update:

Just ordered one, will let you know how it goes! :)
by nickhills
Tue Apr 09, 2013 6:14 am
Forum: HATs and other add-ons
Topic: PiFace outputs to Drive 8 relays
Replies: 20
Views: 8742

Re: PiFace outputs to Drive 8 relays

The board you have posted activates when the pins are taken to gnd, so I think that board will work with the piface without any modifications. (You may need to power it seperatly if you want to run all 8 relays at once-I assume there is an aditional power connector) The relays I have all need +5v to...
by nickhills
Sat Apr 06, 2013 9:33 am
Forum: HATs and other add-ons
Topic: PiFace outputs to Drive 8 relays
Replies: 20
Views: 8742

PiFace outputs to Drive 8 relays

I would like to add a relay board which has 8x SPDT relays with a +5v trigger.

Given that the PiFace is open collector, can anyone suggest how to make these outputs drive my relay board?

Its been a while since I did any electronics :)
by nickhills
Sat Apr 06, 2013 9:27 am
Forum: HATs and other add-ons
Topic: PiFace - Reading Outputs
Replies: 10
Views: 6301

PiFace - Reading Outputs

Is it possible to read the state of an output? I'm very new to python and the Pi, but at present i am trying to keep tack of my outputs using variables to record the state of each pin. What i want to do is instead query (somehow) the state so that I can have multipul processes updating the outputs o...

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