Différences entre versions de « ENG-CANSAT-TMP36 »
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* [http://www.analog.com/en/mems-sensors/digital-temperature-sensors/tmp36/products/product.html TMP36 datasheet] (''analog.com'', html) | * [http://www.analog.com/en/mems-sensors/digital-temperature-sensors/tmp36/products/product.html TMP36 datasheet] (''analog.com'', html) | ||
| − | === | + | === How to measure the temperature === |
{{traduction}} | {{traduction}} | ||
| − | + | It will be necessary to convert the analogue voltage intro degree. As the TMP36 can also measure negative temperature, the 0 degree Celcius is placed at 500 mV offset. So, any voltage under 0.5 Volt is a negative temperature. | |
[[Fichier:TMP36-Graph.png]] | [[Fichier:TMP36-Graph.png]] | ||
| − | + | Here is the formula to use with a TMP36 powered at 3.3v: | |
| − | Temp | + | Temp in °C = ( output_voltage_in_mV - 500) / 10 |
| − | + | So, if we do have an output voltage of exactly 1 Volt (1000 mV) then the temperature would be | |
| − | (1000 | ||
| − | + | temp = (1000 - 500)/10 | |
| − | + | So 50 Celcius degreess. | |
| − | |||
| − | |||
== Wiring == | == Wiring == | ||
Version du 3 octobre 2018 à 15:31
About the TMP36 Sensor
The TMP36 is the reference analogue temperature sensor in the Arduino world. It is affordable, small et power efficient. For sure there are better temperature sensors but this one will do the job for almost nothing :-)
This sensor is very common and easy to use. It is also one of the components of the ARDX development kit.
With the TMP36, it is possible to measure a temperature from -50°C to 125°C, the output voltage is proportional to the temperature.
Don't be fooled, the TMP36 looks like a transistor (eg: P2N2222AG) but it isn't a transistor. It is a complex sensor within a package identical to a transistor.
There are 3 pins on the TMP36.
- the ground (on the left),
- the output signal (center position),
- the +5 volts (on the right)
The sensor output signal does output 10 millivolts per degree (with 500mV offset for temperature under 0°C).
Eg:
- 25° C --> output = 750 mV
- 0° C --> output = 500mV
Technical detail
- Analog output (see graphics)
- Temperature range: from -50°C to 125°C
- Power supply range: 2.7 to 5.5v
- TMP36 datasheet (analog.com, html)
How to measure the temperature
 |
En cours de traduction/élaboration. |
It will be necessary to convert the analogue voltage intro degree. As the TMP36 can also measure negative temperature, the 0 degree Celcius is placed at 500 mV offset. So, any voltage under 0.5 Volt is a negative temperature.
Here is the formula to use with a TMP36 powered at 3.3v:
Temp in °C = ( output_voltage_in_mV - 500) / 10
So, if we do have an output voltage of exactly 1 Volt (1000 mV) then the temperature would be
temp = (1000 - 500)/10
So 50 Celcius degreess.
Wiring
Pour l'utiliser, connectez simplement la broche 1 (gauche) à une source d'alimentation (entre 2.7 et 5.5V), la broche 3 (droite) à la masse (gnd) et finalement la broche 2 (au milieu) sur une entrée analogique de votre microcontroleur.
La tension de sortie est de 0V à -50°C et 1.75V à 125°C. Il est facile de convertir la tension de sortie (en millivolts) en température à l'aide de la formule:
Temp °C = 100*(lecture en V) - 50
La fiche technique du TMP36 est accessible ici.
Written by Meurisse D. from MC Hobby - License: CC-SA-BY.