LOGIC RAIL Optical Detector with photocell

The OD-1 utilizes a photocell (included) between the rails for detection. Whenever the photocell is covered the OD-1 will activate its red outputs. Whenever the photocell is uncovered the OD-1 will activate its green output. Use this version if you have consistent overhead lighting (i.e. you don't have night time on your layout!). Also includes a red/green 5mm LED.