Add lots more outputs to a microcontroller system with chainable shift registers. These chips take a serial input (SPI) of 1 byte (8 bits) and output those digital bits onto 8 pins. You can chain them together to increase outputs, for example, three in a row provide 24 digital outputs.This item contains three 74HC595 chips. Chips may be NXP or TI brand, both with cross-compatible pinouts. These DIP package chips easily plug into breadboards or perfboards with 0.1" spacing. Digital outputs can drive about 20mA, ideal for LEDs or power transistors controlling solenoids.For an excellent tutorial on usage, check out the Arduino ShiftOut page. 3 x 74HC595 shift register chips included Chainable to expand digital output pins DIP package for breadboard compatibility Outputs drive ~20mA for LEDs or transistors
