The $40 Line Follower - Step 1: Parts List

Submitted by Pratheek on January 11, 2008 - 6:50am.

Parts List


Below is the list of parts needed to build the robot.

Item

Qty

Price

Vendor, Part no.

BC548 transistor

4

0.4$

Futurlec.com

CdS Photoresistors

4

2.99$

Radioshack.com

276-1657

5mm Blue Led

4

1.40$

Digikey.com

PC Board(Experimenters Board)

1

1.50$

Futurlec.com

100uf 25V Electrolytic Capacitor

1

0.08$

Futurlec.com

C100U25E

270 ohm resistor

1

0.10$

Futurlec.com

R270R14W

5mm Green LED

1

0.10$

Futurlec.com

LED5G

16 pin DIP socket

1

0.07$

Futurlec.com

ICS16

L293D

1

Free Sample

 

Male Header Pins

4

0.17$

www.robotstore.com

20K Preset

4

0.60$

Futurlec.com

TRIM20K

5mm Red LED

2

0.16$

Futurlec.com

LED5R

1K resistor

2

0.20$

Futurlec.com

R001K14W

1 Inch Standoff

6

4.98$

Hobbyengineering.com

H02171-04U

100 rpm DC motor

 

2

23$

 

Wheels (7.5 cm diameter)

2

3$

 

L-Bracket (to mount motor) 

2

1$

 

 

 

 

 

Total

 

39.75$

 


I bought the motor, wheels and L-Bracket from a local store. I’m not sure if you can buy the same parts online. But similar parts are available at hobbyengineering.com
Other optional parts


9cm x 8cm HDPE Plastic

1

4$

 

Velcro strip

1

 

 

Old mini  CD’s (instead of expensive wheels)

2

<1$

 

0.22uf Ceramic Capacitor

2

0.50$

Hobbyengineering.com

H01032-02D

 

NOTE - Please go through the complete tutorial before buying the parts.

 

Apart from these parts you will also need the following tools and materials, if you don’t have them you may consider buying or borrowing them-
• Soldering Iron
• Desoldering Pump(optional)
• Crimper
• Drilling machine
• A 9v battery and battery clip
• Wires
• Cardboard or wood(instead of the HDPE Plastic)