Hamamatatsu C12880MA, get a little integration time

Julien_brtd · June 17, 2021, 10:45am

Hello, I am using the Hamamatatsu C12880MA and I used these arduino codes:

groupgets/c12880ma/blob/master/arduino_c12880ma_example/arduino_c12880ma_example.ino

/*
 * Macro Definitions
 */
#define SPEC_TRG         A0
#define SPEC_ST          A1
#define SPEC_CLK         A2
#define SPEC_VIDEO       A3
#define WHITE_LED        A4
#define LASER_404        A5

#define SPEC_CHANNELS    288 // New Spec Channel
uint16_t data[SPEC_CHANNELS];

void setup(){

  //Set desired pins to OUTPUT
  pinMode(SPEC_CLK, OUTPUT);
  pinMode(SPEC_ST, OUTPUT);
  pinMode(LASER_404, OUTPUT);
  pinMode(WHITE_LED, OUTPUT);

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The problem is that when I want to observe the spectrum, the spectrometer is way too sensitive and then even the natural light makes it saturate. I have been studying the timing chart in the following datasheet:
https://www.hamamatsu.com/resources/pdf/ssd/c12880ma_kacc1226e.pdf
I want to change the integration time (IT) because I suppose that this one is too big. for that: since IT = 48Tclock + thp(ST), then for this given program the integration time is 134usec and it is almost the minimum limit fixed by (482 + 6*2=108 usec).
Finally I don’t know how to manage to get a non saturate picture, should I change the hardware and not use arduino ?
Thank you for your help !

Toto_Fliess · February 22, 2022, 8:13pm

hey, having the same problem here. could you solve it?