IR for robot on 16F877A

[Samuel]

Thanks dave for guiding me to some very good resource. And thanks to Bruce for that amazing info on IR navigation!!

I am attaching a schematic for modulating my IR's @ 38KHz. I'm not sure what transistors this schematic is using tho. Can someone pls help.

The reason I like this schematic is cuz you can drive 4 IR's .. So I can place them at 4 different points as opposed to building a separate circuit for each IR transmitter.

I really hope this circuit works. If not I have a coupla others but I cant waste time trying all of them ...

Pls tell me what transistors theyre using in thie schematic to drive the IR's.

Cheers,
Samuel