Forum - LED too weak

Hi Masato, can you measure the LED output with a light meter and let us know how much light you're getting at the different LED intensities?

Hi Denise, It's super weak... there is light output but at max the output is 0.007mW and 0.002mW at lowest.

Everything else on the miniscope seems to work fine - can sync with the controller and capture videos.

Hi Masato, a couple things could be wrong. First, make sure you soldered across the two pads on bottom of the sensor board:

Second, make sure there is nothing inside the miniscope that is blocking the light. Sometimes there are stray pieces of plastic that get in the way, but it's unlikely to get the levels that low. You should be getting these approximate values in mW through the microscope.

LED - mW
0 - 0.05
5 - 0.35
10 - 0.7
15 - 1.0
20 - 1.4
40 - 1.4-2.4 (this varies by LED)

Finally, check the LED under a microscope and make sure the pad is entirely intact. It is fairly easy to damage it after the ball has been taken off.

Hi Tristan, Awesome. Problem solved. I hadn't soldered that pad pair - I completely missed hearing that step during the workshop. My optical light meter is now showing readings that very closely matches what you wrote above. Thank you! I think we are all ready to go imaging.