Go to advanced search

by urosv
Sun Nov 08, 2015 12:52 pm
Forum: Automation, sensing and robotics
Topic: Multiple SPI
Replies: 28
Views: 8778

Re: Multiple SPI

Hi Danjperon. A while ago we discussed over forum regarding multiple SPI. In this matter i need help, and would be very much appreciated if you could take minute to look in the problem. Im also attaching the schema, which is from your template to the post. I'm using K type thermocupler. Shema: https...
by urosv
Fri Sep 04, 2015 7:24 am
Forum: Troubleshooting
Topic: Quick Q regarding QPIO voltage
Replies: 7
Views: 953

Re: Quick Q regarding QPIO voltage

Thanks guys for your input and all the help and time...

I was doing major typo...
GPIO.setup(12, GPIO.LOW)
SHOULD BE
GPIO.output(12, GPIO.LOW)

Strange that it not thrown error or exception...!

Thanks again !
by urosv
Fri Sep 04, 2015 5:37 am
Forum: Troubleshooting
Topic: Quick Q regarding QPIO voltage
Replies: 7
Views: 953

Re: Quick Q regarding QPIO voltage

Hi there... tested on GPIO 37,38,12. Measuring between GND and PIN import RPi.GPIO as GPIO GPIO.setmode(GPIO.BOARD) < SQL BLOCK to GET cursor.rowcount value > if cursor.rowcount == 0: print "OFF"; GPIO.setup(12, GPIO.LOW) else: print "ON"; GPIO.setup(12, GPIO.HIGH)
by urosv
Thu Sep 03, 2015 6:43 pm
Forum: Troubleshooting
Topic: Quick Q regarding QPIO voltage
Replies: 7
Views: 953

Quick Q regarding QPIO voltage

I'm reading only 1.2V on GPIO HIGH ? RPI 2 B+ (brand new from the box) ? Is this normal ?
Thanks for input on the matter ?
by urosv
Sat Apr 18, 2015 9:58 am
Forum: Automation, sensing and robotics
Topic: Multiple SPI
Replies: 28
Views: 8778

Re: Multiple SPI

Hi there... Something very strange happened today with this project and I was wondering if you have any idea on that... The 3 sensors are/were working great. Today i needed to test Temperature limit of sensors and strangely i noticed when I was heating them the software actually loweres the values, ...
by urosv
Thu Apr 02, 2015 6:04 pm
Forum: Automation, sensing and robotics
Topic: Multiple SPI
Replies: 28
Views: 8778

Re: Multiple SPI

Thanks for your input :) . My apologies since my communication in English may not be straight forward. The question was only due so many possible solutions to this problem nothing more. The bottom line is that we will use this on industrial compression unit. 2 ALU plates with heater to monitor tempe...
by urosv
Thu Apr 02, 2015 12:07 pm
Forum: Automation, sensing and robotics
Topic: Multiple SPI
Replies: 28
Views: 8778

Re: Multiple SPI

While browsing the net a few solutions replacements for max6675 was found. Regarding your expertise on the problem do you think we are using the right approach to solving the problem or should we use different equipment.
by urosv
Thu Apr 02, 2015 9:20 am
Forum: Automation, sensing and robotics
Topic: Multiple SPI
Replies: 28
Views: 8778

Re: Multiple SPI

danjperron thank you very much for your help. We successfully created 3 sensor reading module with RPI !

The question popped out that in the future we would like to read even more of them. Is this even possible with this kind of approach or do we need something extra ?
by urosv
Mon Mar 30, 2015 7:54 am
Forum: Automation, sensing and robotics
Topic: Multiple SPI
Replies: 28
Views: 8778

Re: Multiple SPI

Why do you use 5V pin and regulate it to 3.3V. Is there any obstacle not to use Pin1 which already has 3.3V ?

Regards... and again thank you very much !
by urosv
Sun Mar 29, 2015 6:14 am
Forum: Automation, sensing and robotics
Topic: Multiple SPI
Replies: 28
Views: 8778

Re: Multiple SPI

Daniel, tahnk you so much for this post. Can i also ask you if you can provide a schematic view of connecting 3x Max6675 to RPi just to be sure and not mess something!
danjperron wrote:Before I test my design with the Max6675 on the arduino, I hook the max6675 to a 74HC138 and made it work.

Daniel
by urosv
Fri Mar 27, 2015 4:08 pm
Forum: Automation, sensing and robotics
Topic: Multiple SPI
Replies: 28
Views: 8778

Multiple SPI

Hi there... I'm using MAX6675 with analogue temp sensor to read temperature. But i need at least 3 sensors working this way. The main agenda using MAX6675 is that we need height temp sensors which dallas (the easy way with Digital inputs) ca not deliver. T>200 degrees. The question is is it possible...
by urosv
Mon Feb 16, 2015 12:16 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Measuring temperatures to 200 degrees
Replies: 2
Views: 753

Measuring temperatures to 200 degrees

Dear Raspberry Pi users. We are working on a automated project and for that we need to get digital temperature sensors for RPI that can handle 200 degrees. Preferable waterproof. Current Dallas DS18B20 is used for demo but cant handle more than 125. Can anybody point me to the right direction ? Any ...

Go to advanced search