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Topic: Reading central heating system thermistor's? (Read 2111 times) previous topic - next topic

MrGlasspoole

Ups, i did forged the attachment in the last posting.
I think i need more sleep  :smiley-sleep:

dc42

Two problems:

1. You have the output of the MAX6145 shorted to ground.

2. Pin 1 of IC2 needs to be driven low by the same signal that drives the CS input of ADC low. You are using Voa to drive CS low. So you need to connect pin 1 of IC2 to Via of the ADUM6401, not to Vic. Alternatively, swap the ADUM6401 channels around.
Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

MrGlasspoole

I thought the Arduino SCK (D52) must be routed to SCK of the MCP3204?
If i swap them "Arduinos SCK" goes to "CS of MCP3204" and "CLK of MCP3204" to a digital pin of the Arduino?

dc42


I thought the Arduino SCK (D52) must be routed to SCK of the MCP3204?
If i swap them "Arduinos SCK" goes to "CS of MCP3204" and "CLK of MCP3204" to a digital pin of the Arduino?


Correct; so if you swap the ADUM6401 inputs around, you must swap the outputs in a similar way. However, pin 1 of the 74LV125 must be controlled by the same signal that controls CS on the ADC.
Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

MrGlasspoole

I just want to let you know that i already have some parts but not all and
that i also need to figure out some other stuff.
I will build it - not that you think your efforts on teaching me this was to no avail

dc42

Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

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