Difference between revisions of "Line follower"

Revision as of 19:41, 14 May 2010

A line follower built for as part of an electronics course. Design and construction is done from scratch.

Consists of elements from analog sensing, digital logic, and driver circuits.

The project had the following outline:

An autonomous unit following a dark line on a bright background
Logic 1 (5V) when detector is over line, otherwise logic 0 (0V), CMOS technology
Motors controlled by driver circuit
Turn off when no line under detectors
Steering right/left accomplished in 3 phases; straight ahead, 5 degree, and 10 degree
Powered by a battery power-source

1 L293D motor driver
5 QRD1114 IR LED and Phototransistor sensor
- Or, 5 LED red
  - 5 SD5443 phototransistor
1 BC546B BJT transistor
2 GM8 motor and wheel kits
- GMPW Deal
2 GMB28 GM8 gear motor bracket
1 RE210-S1 Protot.card 100x160
1 9v battery connector
1 LM2937 5v voltage regulator
- Or, 7805 5v voltage regulator
3 4071 Quad OR-gates
- Or, 2 4072 Dual 4-input OR-gates
1 4069 Hex NOT-inverters
1 1N4148 diode small signal
1 SWT1 SPDT Switch
x 10k Resistors
Or, RT20k 20k Multi-turn trimpot

@@ Line 10: / Line 10: @@
 * An autonomous unit following a dark line on a bright background
-* Logic, 1 (5V) when detector is over line, otherwise logic 0 (0V), CMOS technology
+* Logic 1 (5V) when detector is over line, otherwise logic 0 (0V), CMOS technology
+* Motors controlled by driver circuit
 * Turn off when no line under detectors
 * Steering right/left accomplished in 3 phases; straight ahead, 5 degree, and 10 degree
-* Powered by a battery power source
+* Powered by a battery power-source
 == BOM ==