TITLE:
Bluetooth enabled mobile controlled robot
CIRCUIT DIAGRAM:
COMPONENTS LIST:
[ Note that for FORWARD,REVERSE,LEFT and RIGHT, phone keypad buttons may vary depending on motor connections. ]
APPLICATIONS:
Bluetooth enabled mobile controlled robot
CIRCUIT DIAGRAM:
COMPONENTS LIST:
- Wires
for connection.
- DTMF
IC cm8870 or mt8870
- Motor
driver ic L293D
- Bluetooth
headset
- A
mobile phone with bluetooth facility in it.
- 7805
voltage regulator ic
- This is a simple mobile controlled robot project. In this project user can control robots just by specific set of keys.
- First Bluetooth enabled phone is connected to Bluetooth headset like normally its done. When key on mobile is pressed then according to following table different frequency is generated by phone.
1209 Hz
|
1336Hz
|
1477Hz
|
1633 Hz
|
|
697 Hz
|
1
|
2
|
3
|
A
|
770 Hz
|
4
|
5
|
6
|
B
|
852 Hz
|
7
|
8
|
9
|
C
|
941 Hz
|
*
|
0
|
#
|
D
|
- These are also called as DTMF tones which are heard / received by bluetooth headphones. These tones are then passed to DTMF decoder IC(CM8870 / MT8870). Received tones are decoded into binary of the number pressed on phone.
- For example if 1 is pressed then 0001 data comes as output. Here pin 11 will be high and pins 12,13,14 will be low.
- If 2 is pressed then 0010 data comes as output.Here pin 12 will be high and pins 11,13,14 will be low and so on can drive the complete robot.
Binary data
|
Numerical value
|
Description
|
0000
|
0
|
(STOP)
|
0110
|
6
|
(FORWARD)
|
1001
|
9
|
(REVERSE)
|
1010
|
*
|
(LEFT)
|
0101
|
5
|
(RIGHT)
|
.
APPLICATIONS:
- This
project can be used at homes to serve tea /coffee etc to guests, to serve
to employees in companies etc.
- This
can also be used in places like hotels where this trolley shaped robot
carries customer’s order to their table.
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