diff --git a/blinkled/sampledata/info.txt b/blinkled/sampledata/info.txt
index 3b61687..855146c 100644
--- a/blinkled/sampledata/info.txt
+++ b/blinkled/sampledata/info.txt
@@ -11,3 +11,7 @@ PXL_20220808_233318199.mp4
 
 captures w/ a delay of 35ms instead of previous 34ms (for 4224.mp4)
 also w/ a smaller resistor, 68Ω instead of 100Ω.
+
+
+https://developer.android.com/reference/android/hardware/camera2/CaptureResult.html#SENSOR_EXPOSURE_TIME
+https://developer.android.com/reference/android/hardware/camera2/CaptureRequest#SENSOR_EXPOSURE_TIME