The LM78XX series of voltage regulators are commonly used in various electronics appliances and projects. LM7812 IC comes in the family and provides a fixed regulated output of 12V DC for a variable input voltage range of 14.5 to 27V DC.
The 74HC244 IC is an 8-bit buffer or line driver IC having 3 state outputs. The IC can either be used as two 4 bit buffers or just one 8-bit buffer. The IC has a wide range of input voltage and has a very less current consumption.