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At sometime or another you may run out of pins on your Arduino board and need to extend it with shift registers. With this shift out module which is based on 74HC595. The datasheet refers to the 74HC595 as an "8-bit serial-in, serial or parallel-out shift register with output latches; 3-state." In other words, you can use it to control 8 outputs at a time while only taking up a few pins on your microcontroller. You can link multiple registers together to extend your output even more. It can also be applies to 51, AVR, PIC and other microcontroller.
This is a Micro SD(TF) module from DFRobot. It is compatible with TF SD card (commonly used in Mobile Phone) which is the most tiny card in the market. SD module has various applications such as data logger, audio, video, graphics. This module will greatly expand the capbility an Arduino can do with their poor limited memory.
This module has SPI interface and 5V power supply which is compatible with Arduino UNO/Mega. The Pinout is fully compatiblw with DFRobot's IO Expansion Shield V7.
Suitable for all kinds of circuit boards, sensors, mechanical support of the installation. They are great for building a multi-level robot chassis. This 10-pack of standoffs includes 10 sets screws and nuts for securing the top of the standoff to your project.