You'll save tons of time and won't need the soldering iron for these Sharp infrared sensor cables! These cables allow you to easily interface Sharp infrared sensors to your robotics project without the need for soldering.
Looking for a very good photoreflector? The OPB730F is an EXCELLENT unit!
Left, Middle, Right short range sensors in a small package.
Finally, a drop-in replacement for the venerable, but obsolete, PNA4602! This unit detect standard 38Khz pulsed signals and the carrier frequency. It makes a cheap analog 38kHz signal strength/data detector for robots, secret triggers, and other electronic projects.