Mini Robot

This circuit is dedicated to those who like robotics. The mini-robot sees obstacles and luminous objects, for this is worth 2 phototransistors (eyes). The phototransistors minicerebro send the information to the robot, which guides you to look more luminous places. I hope that we assembled.

HOW IT WORKS: The principle is simple, as shown in the diagram. An astable multivibrator fed a 2 common engines. In the control of the driving time from each of the branches are connected astable sensors, the phototransistors.

When they receive the same amount of light, has astable driving equals, and with engines that rotate at the same speed. Under these conditions, the robot moves in a straight line. In the event that one of the phototransistors receives more light than the other, the astable is unbalanced and one of the motors rotates faster and the other more slowly, resulting in the robot to turn.

If there were no source of light that makes the balance in the conduct of phototransistors, the robot will give a complete until you find enlightenment that leads to balance the circuit, then is moving in a straight line again. The adjustment of the imbalances is done with the trimpots (minipotenciòmetros) to bring the robot to the behavior we want.

On the circuit includes 2 LEDs connected to the collectors of the transistors to give a visual effect, they blink according to the light seen by the robot. Ilimentaciòn the circuit is done with 6 volts (4 batteries medium), the engines are for this voltage and low consumption.

This circuit has already been assembled with excellent results by one of the users of the forum, you can view the entire history of the process.

List of components
Capacitors:
C1-C2: 2.2 µF. (electrolytic)
C3: 220 nF. (ceramic)
Semiconductors:
Q1, Q8: BD135 (NTE 375)
Q2, Q5, Q6, Q7: BC548
Q3, Q4: TIL78 (phototransistors)
D1-D2: 1N4001.
Resistors:
P1, P2: 22 kΩ (trim-pots)
R1, R2, R3, R4, R5, R6: 1K MΩ 1/8 Watt.
R7: 470 Ω Others:
M1, M2, 6-volt motors (oxford)
Printed circuit board, support for 4 plias medium, wire, welding, gears, wheels, these are the other material in the manufacture of the robot.
Shape of the robot: you want to give him.

pcb expensive components of the mini robot

pcb expensive components print

Tags: robotics, science, technology, electronics, nanotechnology, batteries, nano transistors