Hello,
In the past I have build a danger shield.
All is working well with one exeption.
The temperature reading are not good.
I have checked the components agains the schematic.
In the schematic (V16) I found for the temperature a LM335, and I have installed (whas in the box) a TMP36.
These are different divices.
What should I do, desolder the TMP36 and install a LM335?
Thanks for any help.
Jan Kromhout
Hellevoetsluis
First carefully read the data sheets for each of these temperature sensors.
What are the differences?
1- input voltage
2- connections
3- output voltage as a function of temperature
If the first two item are the same and the third is different then adjust the constants in the code to get the correct temperature.
If items 1 & 2 are different then it may be best to use the an LM335 instead.
The LM335 is basically a 2 terminal device, the TMP36 a 3 terminal device. If you want to use a TMP36 you will have to :powersoft:
What should I do, desolder the TMP36 and install a LM335?
remove the 10k resistor (R21) that brings Vcc to pin2
add a jumper wire from Vcc to pin1 to power the TMP36
Thanks all for this response, still strange that the TMP36 whas deliverd with the package!
I will inform the suplier.