|
Here is the sensor working. As ants pass through the belt a counter is increased. The circuit is designed so that the daylight is disregarded. |
Here is a closeup for the sensor. The IR light curtain is formed around the inner metal belt which acts as a very good mirror at the IR wavelengths. |
Details of the sensor electronics.The node uses a digital 1-wire interface. The IR LED and the photo-transistor are mounted on the disk. |
| |
||
