BERNT

By GreenGrove
@ January 12, 2009

• Actuators / output devices: 2 motors, 1 Servo
• CPU: Picaxe 28x1
• Power source: 4 AA batteries
• Programming language: Picaxe basic
• Sensors / input devices: Sharp IR, Parallax Ping))), 2 Bumper switches
• Target environment: indoor

Some of you have emailed me and asked how I got the PING))) sensor to work with the 28X1 board. All of you should take a look at the following excellent walkthrough/tip: http://letsmakerobots.com/node/1276 made by Vince v2.0

The main thing is to make sure that the sensor is supplied with 5V! ( I made that mistake)
The walkthrough discusses most of the problems that may occurs while dealing with this sensor.

 The subroutine in BERNT dealing with the PING))) sensor looks like this:

get_distance:
high portc 0
pauseus 5
let dirsc = %00000000
pulsin 0,1, w0
return 

 EDIT: 2009-01-29 - New Navigation Code

BERNT is now a little more "smooth" in his navigation and I've decided to add a video of his performance. =o) 
Next part is to make him follow a wall using his Sharp IR Sensor. Video will of course be added.

Beer is great. 

EDIT: 2009-01-30 - BERNT IS DEAD 

Bernt the way we know him is dead! A new-born BERNT will be published soon though, this time with some more sensors, new code and some cool accessories.