The
Agribot block diagram consists of following blocks:-
It acts as a centralized control for all other blocks in unit. It monitors various parameters such as relay drivers and IR sensors. Microcontrollers provide real time (predictable, though not necessarily fast) response to events in the embedded system they are controlling. Microcontroller has 4K Bytes of ISP Flash Memory which is used to store the program.
Program is executed in microcontroller by using MAX 232. Microcontroller is burnt by using hex file using MAX 232 IC. It converts signals from an RS-232 serial port to signals suitable for use in TTL compatible digital logic circuits. The MAX232 is a dual driver/receiver and typically converts the RX, TX, CTS and RTS signals.
3. DB9 Female Connector
It is used to interface with the computer in order to change the instructions to command the bot. It connects the computer interface port with MAX232 serial port.
There are four relay drivers in the block diagram which are used to control the working of DC motor. Two relay drivers are used for the forward moving operations of the bot by controlling the two DC motors respectively. The other two relay drivers are used to control single DC motor for forward and reverse operations which is used to control the handle for seed dropping mechanism.
5. DC Motor
There are four DC motors in the block diagram in which two DC motors are used to rotate the caster wheels which are in synchronization with each other during forward operations and unsynchronized during turning operations.
The other two motors are used to move the handle in forward and reverse for seed dropping mechanism.
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