This project report summarizes a mini project on an RF controlled DC motor. The project uses an ASK RF transmitter module and receiver module operating at 315MHz or 433MHz to wirelessly control a DC motor. The transmitter circuit includes an HT12E encoder IC connected to push buttons to send binary data to the transmitter module. The receiver circuit includes an HT12D decoder IC connected to an LED and motor driver IC to receive the data and control the motor. The circuit diagrams and components used are described.

1. Mini Project Report
On
RF Controlled DC Motor
Fifth Semester B.E. (Electronics Engineering)
Section-B
by
Nikhilesh Gupta
Mitesh Agrawal
Under the guidance of
Ms.Y.A.Gaidhani
Department of Electronics Engineering
Yeshwantrao Chavan College of Engineering
Wanadongri, Hingna Road, Nagpur – 441 110
March 2011
1

2. Certificate
This is to certify that the following mentioned students have successfully
completed their project on RF Controlled DC Motor in the Electronic Workshop
laboratory as per the rules of the college satisfactorily in the year 2010-2011.
Subject: Electronic Workshop
Branch: Electronics Engineering
Year: 3rd – 6th Sem
The Students are:
1) Nikhilesh Gupta
2) Mitesh Agrawal
Signature of Project guide
2

3. ACKNOWLEDGEMENT
We humbly acknowledge the support and constant guidance provided by our
project guide Ms.Y.A.Gaidhani. We also thank our college and our respected
principal.
We appreciate and thank our project guide for their valuable advice, their constant
assistance and immense patience.
3

4. INDEX
1) Introduction
2) Components used
3) Circuit diagram
4) Description & Working
5) PCB Layout
6) Reference
4

5. Introduction
The following project is based on wireless communication in RF range. It includes
wireless ASK RF Module of 315 MHz / 433 MHz frequency which is used for
communication and L2393D Motor Driver IC which is used for controlling the
direction of Motors.
The 4 Bit Binary data is transmitted using ASK RF transmitter Module and
correspondingly same data is received by ASK RF Receiver Module.
Thus the interfacing of motor driver IC with Wireless communication Modules
completes the structure of RF controlled motor.
5

6. Components used
• ASK Module (433MHz / 315MHz)
• IC’s:-
a. LM293d (Motor Driver)– 1
b. HT12D (Decoder)– 1
c. HT12E (Encoder)– 1
d. 7805 (Voltage Regulator 5V)– 2
• LED’s - 4
• Resistors:-
a. 51 k - 1
b. 1000 k - 1
c. 330 E – 4
• Capacitors:-
a. 1000 uF – 2
b. 10 uF – 4
c. 104 pF - 2
• Battery Snaps – 2
• Battery 9V – 2
• Copper Clad – (8 x 6) and (10 x 7)
• Solder Iron, Wire, and Flux
• Motor
6

7. Circuit Diagram
1. Receiver Circuit
7

8. 2. Transmitter Circuit
Description & Working
8

9. The circuitry consist of two parts viz.,
• Transmitter
• Receiver
Transmitter:
It consists of A-434 Transmitting module and HT12E encoder IC. The pin no 17
that is Dout of IC is given to pin no 2 of module so that serial transmission is
enabled. Pin 1- 8 of IC HT12E is grounded so as to generate a binary address of
00000000b. Pin no 9 is ground and pin no 18 is +Vcc. The pin no 14 (transmission
enable) /TE is grounded to enable the transmission. Pin 10 – 13 act as data pins to
which push button switches are connected. Pin no 4 of A-434 transmitting module
is Antenna having a maxima length of 17 cm. A 750K resistance is connected b/w
pin 15 – 16 of HT12E encoder IC to generate the frequency oscillations of
transmission.
Receiver:
It consists of 8 pin A-434 ASK receiver Module and HT12D decoder IC. Pin 7 of
module is data pin is connected to pin 14 of IC (Din). Pin 1- 8 of IC HT12D is
grounded so as to generate a binary address of 00000000b. Pin no 9 is ground. Pin
no 18 is +Vcc. Pin 10-13 are Data pin which give the output (the data transmitted).
Led is connected to pin no 17 through a resistor of 330 ohm. This glows when
there is a valid transmission. The 1st pin of Receiver module is the antenna. Whose
max length is 17cm. the 33k resistance is connected between pin no 15-16 so as to
generate frequency for the data receiving.
9

10. PCB Layout
Transmitter
Receiver
10

11. Reference
www.bootskool.com
11