Rf controlled pick up and drop robot
- 1. RF CONTROLLED PICK UP AND DROP ROBOT Project By Aditya Bulbule PA-05 Jayesh Kasar PA-08 Piyush Kanchan PA-16
- 2. Introduction ● In this remote controlled pick and place robot we have used a transmitter and receiver. ● We have also used a C8051F340 microcontroller that is interfaced to the RF receiver. ● This RF receiver receives commands that are sent by the RF remote. ● As soon as the user presses the push buttons, the commands are sent to the RF remote, which makes the arm move in the specified up or down direction or grip open or close. ● The receiver circuit uses the 4 motors to control the movement of the vehicle via RF remote.
- 4. Description ● Transmitter Block Diagram : ○ Transmitter consists of 9v battery from the four push buttons signals are passed to encoder which generate different signals for different function and this signals are transmitted to receiver ● System Block Diagram : ○ It consists of a 12v battery and is connected to a voltage regulator. When receiver receives signal from transmitter it Decodes it in decoder and then passes it to C8051F340 microcontroller , microcontroller processes this signal and than pass it accordingly to motor driver of wheel motor or arm motor which turn motor in according direction.
- 5. Selection of Components and its specification 1. RF 433 MHz Module: ● Wireless (RF) Simplex Transmitter and Receiver ● Receiver Operating Voltage: 3V to 12V ● Receiver Operating current: 5.5mA ● Operating frequency: 433 MHz ● Transmission Distance: 3 meters (without antenna) to 100 meters (maximum) ● Modulating Technique: ASK (Amplitude shift keying) ● Data Transmission speed: 10Kbps ● Circuit type: Saw resonator ● Low cost and small package 2. Encoder IC(HT12E): ● 18-pin DIP ● Operating Voltage : 2.4V ~ 12V ● Low Power and High Noise Immunity, CMOS Technology ● Low Standby Current : 0.1uA (typ.) at VDD=5V ● Minimum Transmission Word = 4 ● Built-in Oscillator needs only 5% Resistor ● Data code has positive polarity ● Easy Interface with and RF or an Infrared transmission medium ● Secure and robust protocol ● Ideal for remote control and security applications ● Compatible with the HT12D decoder IC ● Minimal External Components
- 6. ... 3. Decoder IC (HT12D): ● 18-pin DIP ● Operating Voltage : 2.4V ~ 12.0V ● Low Power and High Noise Immunity, CMOS Technology ● Low Standby Current : 0.1uA (typ.) at VDD=5V ● Capable of Decoding 12 bits of Information ● 8 ~ 12 Address Pins and 0 ~ 4 Data Pins ● Received Data are checked 3 times ● Built in Oscillator needs only 5% resistor ● VT goes high during a valid transmission ● Easy Interface with an RF or an Infrared transmission medium ● Secure and robust protocol ● Ideal for remote control and security applications ● Compatible with the HT12E encoder IC ● Minimal External Components 4. Voltage Regulator (lm340): ● Iout (Max) (A)- 1.5 ● Vin (Max) (V)- 35 ● Vin (Min) (V)- 7.5 ● Vout (Max) (V)- 15 ● Vout (Min) (V)- 5 ● Operating temperature range (C)- 0 to 125 5. Battery(9V) 6. Push Buttons
- 7. ... 7. Motor Driver (L293D): ● Can be used to run Two DC motors with the same IC. ● Speed and Direction control is possible ● Motor voltage Vcc2 (Vs): 4.5V to 36V ● Maximum Peak motor current: 1.2A ● Maximum Continuous Motor Current: 600mA ● Supply Voltage to Vcc1(vss): 4.5V to 7V ● Transition time: 300ns (at 5Vand 24V) ● Automatic Thermal shutdown is available ● Available in 16-pin DIP, TSSOP, SOIC packages 8. DC motor 9. Robotic Arm
- 11. Algorithm Initialize PORT1 (Pin 1.0 - Pin 1.3) as Digital input (PORT 1 is connected to receiver) Initialize PORT3 (Pin 3.0 - Pin 3.3) and PORT4 (Pin 4.0 - Pin 4.3) as Digital output (PORT 3 and PORT 4 are connected to L293d ) PORT 1 gives a 4-bit number as a input to the microcontroller(To PORT 3 by default) Different combinations of this number are set to perform specific task If 4-bit number == 0001 #bot moves forward If 4-bit number == 0100 #bot moves backward If 4-bit number == 0011 #bot moves right If 4-bit number == 1001 #bot moves left If 4-bit number == 1111 #Now the input given to port 3(from port1) is shifted to port 4 where the command is prompted to move the robotic arm to perform pick up and drop operation
- 12. Expected outcome ● When we send signal from transmitter of moving robot or moving its arm it will send to encoder and encoder sends specific signal for that specific task to transmitter which transmits that signal towards receiver than receiver sends that signal to decoder to decode that signal and sends it to microcontroller than microcontroller process that signal and sends it accordingly to the specific motor driver and then motor driver makes motor to run in according direction.
- 13. References ● https://components101.com/l293d-pinout-features-datasheet ● https://www.ti.com/product/L293D ● https://www.homemade-circuits.com/simple-100-meter-rf-module-remote/ ● https://components101.com/433-mhz-rf-receiver-module#:~:text=433%20MHz%20 Module%20Specifications%3A&text=Receiver%20Operating%20Voltage%3A%203 V%20to,)%20to%20100%20meters%20(maximum) ● https://www.electronicshub.org/interfacing-dc-motor-8051-microcontroller/ ● https://www.elprocus.com/interfacing-dc-motor-with-8051-microcontroller/#:~:text=T he%20IC%20L293D%20is%20used,DC%20motor%20can%20be%20controlled.