Mod Part 1

Conversion wiring diagram

Pin	Item	from	To	color	other
	Arduino	5V pin	Breadboard	Red	5V Power Rail
	Arduino	GND	Breadboard	Black	GND Rail
PWM 7	servomotor	Servo	Arduino	white	Steering communication
	servomotor	Servo GND	Breadboard GND Rail	Black	GND
	servomotor	Servo Power	Breadboard Power Rail	Red	5V.
Digital 30	H-bridge	ENA	Arduino	Blue	Enables motor controller
Digital 52	H-bridge	IN1	Arduino	Orange	Spins dc motor one way
Digital 53	H-bridge	IN2	Arduino	Green	Spins dc motor opposite way
	H-bridge	MOT DC	Battery +	Red	(6-35)V
	H-bridge	MOT DC	Battery -	Black	GND
	H-bridge	MOT 1 (+)	car	Red	Power
	H-bridge	MOT 1 (-)	car	Black	GND
	H-bridge	5V-Power	Breadboard  5V Power Rail	Red	Power
	H-bridge	GND	Breadboard GND Rail	Black	GND

Making Servo ext. cable:

1.      Snip male end off

2.      Separate the 3 cables (B,R,W)

3.      Strip 3 wire ends

4.      Twist bare wire together

5.      Place 1 peace of heat shrink on each set of cables

6.      Dip wire ends in flux

7.      Tint all 6 wire ends

8.      Solder 3 connections servo ext cable to other wire

9.      Place heat shrink over connection

10.   Melt heat shrink

Findings:

·        Car was responding to embedded program as expected.

·        H-bridge: 

o   Mot DC plug can handle 6-35v

§  Battery wire melted instantly with 22gage. It had 10v coming from battery connected

§  Made new cable 18 gage, work beautifully

o   Heat sink gets extremely hot when powered on (don’t touch)

DC Motor code

/*      digitalWrite(52, HIGH); //forward yellow light on H-bridge
          digitalWrite(53, LOW);
*/

/*      digitalWrite(52, LOW);  //reverse red light on H-bridge
          digitalWrite(53, HIGH);
*/

Accomplishments of the day:

·        Car mods

o   Servomotor ext cable made

o   Added 2 additional cables from DC motor (+,-)  on car; for micro controller to provided power to DC motor through H-bridge

o   H-Bridge extra battery connector made 18gage with red connector ends

·        Steering   

o   Tested servo code

§  rotate wheels from 0-180 degree in increments of 20 degree

·        Program Arduino to drive the car in a circle

o   front wheels set to 20 degrees and constant power in forward motion

Mod still not done

o   We need to figure out a way to secure the three components on the car:

o    Arduino,

o   Breadboard

o   H-bridge

o   Sensors

Naseem soldering

cables connecting Arduino to H-bridge (chart above for color coding)

Nathan connecting cables to H-bridge

H-bridge cable after first test

gage of wire to small.

Video of test car going around in a circle at constant speed.

wheels are set  20degree to the left