Pages: [1]   Go Down
Author Topic: Laserpowermeter with Arduino Nano  (Read 303 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 2
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi,
I am very new to Arduino, but I already know a bit about c programming.
I would like to build a Laserpowermeter... so I already bought a thermal sensor which outputs 0,1mV per 1mW... I would like to measure 0-6000mW with this sensor and display it on a lcd. How can I measure the range of 0,1mV till 6V with the analog input of an an arduino board? Is there a possibility?

Regards
Mathias
Logged

Global Moderator
UK
Offline Offline
Brattain Member
*****
Karma: 238
Posts: 24353
I don't think you connected the grounds, Dave.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

With a potential divider to reduce the range to 0 to 5V you could measure 0 to 6V, but only with about 4.7mV resolution.
If you need better resolution, you need an external A/D converter.
Logged

"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

Offline Offline
Newbie
*
Karma: 0
Posts: 2
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Oh I am sorry, I was totaly wrong.... I do not need to measure more than 10W Laserpower... so I would be in the range between 0,1mV and 1V.... If I add an op amp amplifier wit an amplification factor of 5... I would be in the range of 0,5mV-5V... Which resolution is possible in this range? would it be possible to measure with an accuracy of 1mW?

Thanks
Mathias
Logged

Pages: [1]   Go Up
Jump to: