Hi erco.I've seen many bots that use a servo to pan for obstacles.They need to stop and look around but look more "roboty" Ha Ha.I'm ordering some servos later today but I've never used one.I was put off by the mention of timed pulses,etc. but I'll figure it out from code examples. I've got another 5 US sensors coming tomorrow.
The problem with IR or US sensors is the beam bouncing away from an obstacle like approaching a wall not at a right angle.The wall disappears
The strip board for my US bot was from an infra red picaxe bot that went to fast for the sensors range.I'll post a photo when I can shrink its size to allow posting.The IR 38KHz was B.0 pwm to 3 IR leds via 220R each to A.0,A.1,A.2. Send them low to light led.Each led had a 3 pin tv type IR receiver with a pin that went low when 38KHz detected.Range was 8 inches.If I had 3 opto isolators I could have used trannys to up the led current..maybe more range.
I must buy a "Dremel" type hobby tool with a mini circular saw and drill bits.