Difference between revisions of "Component: Thermistor (Environmental)"
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A generic thermistor component that can be used to simulate and create code for any thermistor with a known temperature/resistance curve. Thermistor is connected in a simple potential divider circuit - thermistor between ADC input and 0V, and a fixed resistor between ADC and the positive supply. Default calibration is for the EBM003 module. | A generic thermistor component that can be used to simulate and create code for any thermistor with a known temperature/resistance curve. Thermistor is connected in a simple potential divider circuit - thermistor between ADC input and 0V, and a fixed resistor between ADC and the positive supply. Default calibration is for the EBM003 module. | ||
| − | ==Component | + | ==Component Source Code== |
| − | + | Please click here for the component source code: [https://www.flowcode.co.uk/wikicopy/componentsource/FC_Comp_Source_Thermistor.fcfx FC_Comp_Source_Thermistor.fcfx] | |
==Detailed description== | ==Detailed description== | ||
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==Examples== | ==Examples== | ||
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| width="10%" align="center" style="background-color:#D8C9D8;" | [[File:Fc9-prop-icon.png]] | | width="10%" align="center" style="background-color:#D8C9D8;" | [[File:Fc9-prop-icon.png]] | ||
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Properties''' | | width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Properties''' | ||
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| + | | width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]] | ||
| + | | width="90%" style="background-color:#EAE1EA; color:#4B008D;" | ADC Properties | ||
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| colspan="2" | The ADC channel to which the thermistor circuit is connected. It is assumed that the thermistor is connected between the ADC pin and 0V, with a fixed resistor connected between the ADC pin and +V. | | colspan="2" | The ADC channel to which the thermistor circuit is connected. It is assumed that the thermistor is connected between the ADC pin and 0V, with a fixed resistor connected between the ADC pin and +V. | ||
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| + | | width="10%" align="center" | [[File:Fc9-type-16-icon.png]] | ||
| + | | width="90%" | VRef option | ||
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| + | | colspan="2" | Defines what is used as the ADC maximum reference. ADC Range = GND to VRef Voltage VDD - Defines the microcontrollers power supply pin as the max reference, VREF+ Pin - Dedicated pin on the microcontroller to allow for a variable reference voltage. | ||
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| width="10%" align="center" | [[File:Fc9-type-21-icon.png]] | | width="10%" align="center" | [[File:Fc9-type-21-icon.png]] | ||
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| colspan="2" | Number of micro seconds to wait for the ADC input to charge before starting the analogue sample. | | colspan="2" | Number of micro seconds to wait for the ADC input to charge before starting the analogue sample. | ||
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| + | | width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]] | ||
| + | | width="90%" style="background-color:#EAE1EA; color:#4B008D;" | Thermistor Properties | ||
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| width="10%" align="center" | [[File:Fc9-type-16-icon.png]] | | width="10%" align="center" | [[File:Fc9-type-16-icon.png]] | ||
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| colspan="2" | Value in Ohms of the Thermistor at 125 deg C | | colspan="2" | Value in Ohms of the Thermistor at 125 deg C | ||
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| − | | width="10%" align="center" style="background-color:# | + | | width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]] |
| − | | width="90%" style="background-color:# | + | | width="90%" style="background-color:#EAE1EA; color:#4B008D;" | Simulation |
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Revision as of 17:51, 9 November 2022
| Author | Matrix TSL |
| Version | 1.1 |
| Category | Environmental |
Contents
Thermistor component
A generic thermistor component that can be used to simulate and create code for any thermistor with a known temperature/resistance curve. Thermistor is connected in a simple potential divider circuit - thermistor between ADC input and 0V, and a fixed resistor between ADC and the positive supply. Default calibration is for the EBM003 module.
Component Source Code
Please click here for the component source code: FC_Comp_Source_Thermistor.fcfx
Detailed description
No detailed description exists yet for this component
Examples
No additional examples
Downloadable macro reference
|
GetIntegerTemperature |
| Reads the ADC input and returns the calculated Temperature as Integer degrees C | |
 - INT
|
Return |
|
|
SetChannel |
| Set the ADC Channel | |
| - INT
|
ChannelID |
 - VOID
|
Return |
|
|
SetMinMax |
| Set the minimum and maximum temperature values that can be shown and set on the thermometer readout. | |
 - FLOAT
|
Min |
| Minimum Value | |
| - FLOAT
|
Max |
| Maximum Value | |
| - VOID
|
Return |
|
|
GetRealTemperature |
| Reads the ADC input and Returns the calculated Temperature as Float value in degrees C | |
| - FLOAT
|
Return |
|
|
SetTemperature |
| Sends the given temperature to the display, and calculates the internal values used by the simulated read macros. | |
| - FLOAT
|
Temperature |
| Zero to one value - representing min-max of the sensor. | |
| - VOID
|
Return |
|
|
CalculateTemperature |
| Converts the input ADC value and returns the Temperature in tenths of degree C | |
 - UINT
|
ADCValue |
| ADC Reading to be converted | |
| - INT
|
Return |
|
|
GetADCValue |
| Returns the Raw ADC value from the Analogue Channel | |
| - UINT
|
Return |
Property reference
|
Properties |
|
ADC Properties |
|
ADC Channel |
| The ADC channel to which the thermistor circuit is connected. It is assumed that the thermistor is connected between the ADC pin and 0V, with a fixed resistor connected between the ADC pin and +V. | |
|
VRef option |
| Defines what is used as the ADC maximum reference. ADC Range = GND to VRef Voltage VDD - Defines the microcontrollers power supply pin as the max reference, VREF+ Pin - Dedicated pin on the microcontroller to allow for a variable reference voltage. | |
|
ADC Bit Resolution |
|
|
Conversion speed |
| Clock setting to select how fast the ADC peripheral will perform an ADC conversion. The FRC setting is based on a RC time base and so will vary with temperature and pressure. Other settings are generally based on divisions of the master clock. | |
|
Acquisition cycles |
| Number of micro seconds to wait for the ADC input to charge before starting the analogue sample. | |
|
|
Thermistor Properties |
|
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Wiring |
| Specifies the arrangement of the Thermistor and Fixed Resistor. Pull Down - Thermistor connected between ADC pin and GND, fixed resistor between ADC pin and VCC. Pull Up - Thermistor connected between ADC pin and VCC, fixed resistor between ADC pin and GND. | |
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|
Resistor Value |
| Value in Ohms of the pullup series resistor. i.e. The resistor is connected between the ADC pin and the positive supply rail. | |
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-25C Thermistor Value |
| Value in Ohms of the Thermistor at -25 deg C | |
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0C Thermistor Value |
| Value in Ohms of the Thermistor at 0 deg C | |
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25C Thermistor Value |
| Value in Ohms of the Thermistor at 25 deg C | |
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50C Thermistor Value |
| Value in Ohms of the Thermistor at 50 deg C | |
|
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75C Thermistor Value |
| Value in Ohms of the Thermistor at 75 deg C | |
|
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100C Thermistor Value |
| Value in Ohms of the Thermistor at 100 deg C | |
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125C Thermistor Value |
| Value in Ohms of the Thermistor at 125 deg C | |
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Simulation |
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Label |
| A text label to help you identify the component on the panel. | |
|
Min. Temp. |
| Minimum termperature that can be set or displayed on the thermometer slider. | |
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Max. Temp. |
| Maximum termperature that can be set or displayed on the thermometer slider. | |
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Scale divisions |
| Number of numbered divisions shown on the thermometer scale. | |
