How to use Ultra Sonic sensor (HC-SR04), demonstration with LCD.

Result:

the HC-SR04 is different from most of those commonly seen on the market, which have 4 pins compared to 3 pins. But the operation principle is the same, transmit signal, and depends on when the signal is received to estimate the distance.

"Stalker" -- Quadruped Robot Project

Quadruped Robot Project -- The Stalker

Inspired by the fighting unit "Stalker" in Starcraft.

Project has been re-created and being maintained on this page:

http://blog.oscarliang.net/arduino-quadruped-robot-stalker/

"Wally" -- IR Detection Robot enhanced version V2

Result:

Summary:

1. rebuild Tracking Head with Styrene plastic, to replace the cardboard one.

2. introduced libraries for motor control, and IR sensor, to increase user-friendliness

3. improved object-following algorithm, introduced "object-avoiding" as well.

"Wally" -- IR Detection Robot V1

I will update the functionality of this robot, and upload some videos.

16/12/2011

Object following:

bad points:
1. head needs to be rebuild with better material for more smooth performance.
2. coding needs improvement.

Build your own IR detector

Let's have a look at the result!

IR detection and Photo Transistor Testing

Example:

IR is invisible to human eyes. 

There are two main frequency IR emitters are used: 850nm and 950nm. however for detector, the detectable range covers both frequencies.

Building a 2 dimensional moving Servo (for mounting Sensors on)

Result:

This one hasn't got too much technical stuff involved, all the operations are from previous tutorials. The main things would be the turning head that I made purely from cardboard, and a couple of screws.

DIY: build your own motor driver!

What does it do:

it will take an external power supply and drive up to two 5V DC motors (suitable for most of the homemade robots). Each motor can be controlled by 2 input signals to run clockwise and/or counter clockwise.


result: