Afternoon all,
I never did electronics at school and although I'm quite happy with the concepts, physics and maths the practical side is a bit more daunting. However, I'll give anything a go once.
My latest project is to use temperature sensors (I believe correct terminology is thermistor) at various levels of my new thermal store to report into Cortex. Chris came up with the component on a previous thread and Karam told we what I needed to do
ATC Semitec IP67 10K Precision NTC Thermistor Probe with Lead
"...regards the thermistors what you will need is a set of 'pull down' resistors i.e. so that you form a potential divider for each sensor at the QAI input (sensor connects between 3.3V terminal and channel input and resistor connects between channel input and 0V terminal)..."
looking at the QAI reference doc I believe the schematic of the above is as follows:
QAI.jpg
Source: QAI Datasheet from Idratek website
But turning the advice and schematic to physical connections I'm a bit unsure. So whilst practicing the soldering I did two versions:
Two wires from resistor twisted together and soldered on to the resistor:
WireTogetherandResistor.jpg
Second option is separate the wires and connect to the resistor:
WireSeperateandResistor.jpg
In my mind both achieve the same but I wanted to check with those who have more experience.
Paul
I never did electronics at school and although I'm quite happy with the concepts, physics and maths the practical side is a bit more daunting. However, I'll give anything a go once.
My latest project is to use temperature sensors (I believe correct terminology is thermistor) at various levels of my new thermal store to report into Cortex. Chris came up with the component on a previous thread and Karam told we what I needed to do
ATC Semitec IP67 10K Precision NTC Thermistor Probe with Lead
"...regards the thermistors what you will need is a set of 'pull down' resistors i.e. so that you form a potential divider for each sensor at the QAI input (sensor connects between 3.3V terminal and channel input and resistor connects between channel input and 0V terminal)..."
looking at the QAI reference doc I believe the schematic of the above is as follows:
QAI.jpg
Source: QAI Datasheet from Idratek website
But turning the advice and schematic to physical connections I'm a bit unsure. So whilst practicing the soldering I did two versions:
Two wires from resistor twisted together and soldered on to the resistor:
WireTogetherandResistor.jpg
Second option is separate the wires and connect to the resistor:
WireSeperateandResistor.jpg
In my mind both achieve the same but I wanted to check with those who have more experience.
Paul
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