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by dagnygren
Fri Mar 23, 2018 12:05 pm
Forum: Automation, sensing and robotics
Topic: DIY open source smart thermostat
Replies: 17
Views: 22852

Re: DIY open source smart thermostat

Hi! Been thinking about this as we would need to set up a remotely controlled heating for a summer cabin far far away from home... But as an electronic designer I am very worried about the number of cycles a thermostat will generate on the relay.... Will not take too long until it is worn out. Has a...
by dagnygren
Thu Feb 28, 2013 12:50 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: RS422 Port
Replies: 9
Views: 12110

Re: RS422 Port

Hi again, just reread your fpost and noticed that you in your connection description by mistake said that you are using a MAX422. Earlier I found that you are really using a MAX488. Anyway I couldn't find any indication of a termination resistor in your circuit. It is required between pin 8 and pin ...
by dagnygren
Thu Feb 28, 2013 11:03 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: RS422 Port
Replies: 9
Views: 12110

Re: RS422 Port

Hmm, The Maxim MAX-422 IC is an op-amp and has nothing to do with RS422. You should look for a proper level converter if you want to get away with as few components as possible. Where did you get your connection layout? According to: http://datasheet.seekic.com/PdfFile/MAX/MAX420_Maixm.pdf your conn...

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