Posted by Dan on 17, 2001 at 3:16 PM:
Hi, I've built a few sensors using high-output infrared LEDs and IR phototransistors to simulate a certain arcade game's controls, but their range of detection is fairly small (maybe about 3-4 inches). Does anyone know of any way to extend the range of the IR LED?
Here's the current layout of one of my sensors:
| |
| |
|____|
| |
U U
IR LED-------^ ^--------IR Phototransistor
Basic info: When some object passes under the sensor's range, the IR signal reflects back and triggers the phototransistor.
- Dan