a. VLSI Technology (Front End)
b. VHDL Coding
c. RF Technology
d. DC Motor Operation
e. Robotic Application designing
When we press any switch the data is decoded by the decoder IC and then transmitted by the transmitting Module and at the receiving end the receiving module will receive the signal and then fed to the decoder IC and after decoding the data is fed to the CPLD Circuit, whose output is further given to a Motor driver IC. On the basis of the received BCD Data, CPLD generates data for the Motor driver IC (L293D) which drives two DC Motors. The DC motors are controlled in forward and reverse directions, by giving different data format of four bit generated by the CPLD using VHDL Coding. The robot can move in forward, reverse, left and right directions.
The RF module, as the name suggests, operates at Radio Frequency. The corresponding frequency range varies between 30 kHz & 300 GHz. In this RF system, the digital data is represented as variations in the amplitude of carrier wave. This kind of modulation is known as Amplitude Shift Keying (ASK).
Transmission through RF is better than IR (infrared) because of many reasons. Firstly, signals through RF can travel through larger distances making it suitable for long range applications. Also, while IR mostly operates in line-of-sight mode, RF signals can travel even when there is an obstruction between transmitter & receiver. Next, RF transmission is more strong and reliable than IR transmission. RF communication uses a specific frequency unlike IR signals which are affected by other IR emitting sources.
This RF module comprises of an RF Transmitter and an RF Receiver. The transmitter/receiver (Tx/Rx) pair operates at a frequency of 434 MHz. An RF transmitter receives serial data and transmits it wirelessly through RF through its antenna connected at pin4. The transmission occurs at the rate of 1Kbps - 10Kbps.The transmitted data is received by an RF receiver operating at the same frequency as that of the transmitter.
The RF module is often used along with a pair of encoder/decoder. The encoder is used for encoding parallel data for transmission feed while reception is decoded by a decoder. We use HT12E-HT12D for encoding and decoding respectively. The encoder is used in transmitting circuit with 4 switches. When we press any switch the data is decoded by the decoder IC and then transmitted by the transmitting Module and at the receiving end the receiving module will receive the signal and then fed to the decoder IC and after decoding the data is fed to the CPLD Circuit, whose output is further given to a Motor driver IC (L293D) which drives two DC Motors. The DC motors are controlled in forward and reverse directions.
Brand: Advance Technologies , Marketed by: Kits'n'spares
