He high-performance microchip 8-bit avr risc-based microcontroller combines 32kb isp flash memory with read-while-write capabilities, 1kb eeprom, 2kb sram, 23 general purpose i/o lines, 32 general purpose working registers, three flexible timer/counters with compare modes, internal and external interrupts, serial programmable usart.

Shift register is a cascade of flip flop, sharing the same clock, in which the output of each flip-flop is connected to the 'data' input of the next flip-flop in the chain, resulting in a circuit that shifts by one position the 'bit array' stored in it, 'shifting in' the data present at its input and 'shifting out' the last bit in the array, at each...

L293D is a typical Motor driver or Motor Driver IC which allows DC motor to drive on either direction. L293D is a 16-pin IC which can control a set of two DC motors simultaneously in any direction. It means that you can control two DC motor with a single L293D IC.