The LED interferes with the ALS path

Problem environment

The device features both a LED (light actuator) and ALS (light sensor.)

Steps to reproduce

1. Refer to the layout
2. Locate D3 and Q1
3. Sample from the ALS

Expected result

LED output does not interfere with ALS sampling.

Actual result

It's unclear if interference occurs between the LED and ALS, but according to logic this is likely the case.

Severity level

This is low priority because project requirements state neither LED nor ALS.

Consider adding a low profile (third) tactile switch next to the ALS which blocks light coming from the LED.

The solution to bug #172 in commit 9083169 solves this problem as well, by coincidentally placing a part in the path between the ALS and the LED.