1. PICkit1 FLASH Starter Kit
Low cost
Easy to use interface
Includes all software to develop and debug
User can program in either assembly or HI-TECH C
Includes 8-pin PIC12F675

2. 4 Serial Shift Registers chained together to produce single pin output

3. Rising edge
CLK – Bits are transferred on each rising edge of the clock pulse
CLK_INH – The clock inhibit is available to “pause” the system from reading the inputs. We keep it at ground so the system reads the inputs at all times
SERIAL – This is the serial input to the first piece, which will be zero because there is no piece before it to read an output from
SHIFT_LOAD – When the signal is low it reads all of the input vales, when it goes high it outputs each bit; one per clock pulse
OUTPUT – This is taken at the output of the last piece. It reads the information from piece 4, then 3, then 2, then 1; reading from the least significant bit to the most significant bit (R to L).

4. Samsung SRP-270 Dot Matrix POS Receipt Printer
Features: • Print speed lines per second • 2-color printing • Parallel, Serial, USB Interface options • Automatic paper loading. • Bi-directional print. • Tear Bar and Auto Cutter options