Hi, yes copper is used in those expensive sensors, here;s a link about copper oxidizing i am studying.. shall try a sample soon.
Study and characterization of porous copper oxide produced by electrochemical anodization for radiometric heat absorber
While i was disassembling some dvdrw drives i came across these chips mounted in the laser head, not knowing what they were i spent a day googling around and discovered that they are a laser power monitor in one package. i have the 8 pin version but was wondering if anyone has the 6 pin...
here is a simple design, i might include it in my design too ! the meter will have two ranges 1mw to 200mw and 50mw to 3 watts !
Circuit - LASER/LED LIGHT OUTPUT INTENSITY METER- Circuits designed by David A. Johnson, P.E.
Low power does not require a calibrated sensor, you just need a sensor that is sensitive for low power. I am aiming my meter in the range of 3 watts max as for minimum i need to test it with some low power lasers that i am waiting in the post !
As regards the project Atlantis, i got the...
In the default mode, the setting is +/-6.144 volts.
Thus the value of 32767 would represent a value of 6.144 volts.
Dividing 6.144 volts by 32767 yields a scale factor of 0.1875 mV per bit. This is a significant improvement over the Arduino ADC which resolution of approximately 5 mV per bit...
I am using a 10x10mm tec, on it i mounted two known resistors and wired them to a relay. when the meter is booting, the resistors are allowed to warm the tec and readings are taken, this way the meter will take the time taken to get the theoretical reading and use that to show the actual...
OK so as promised ! here are the basic setup
arduino with lcd shield and external adc !
Software so far is capable of
1 select between internal adc 10bit resolution or external 16bit resoltuion
2 calibrate the tec with a know source
3 initialise the serial port for data logging
I am building a laser power meter based around an arduino uno and a 16x2 shield and with an external adc commonly found ads1115. i am using a 10mm tec with a pre amp composed of FET's to reduce noise.
At the moment it is very basic but i shall add more features to it. the best thing...