User Manual

106
Experimental Procedures
Step 1: Build the circuit. Since the wiring is complicated, let's make it step by step. First, inset
the T-Cobbler and two 74HC595 chips into breadboard. Connect the 5V and GND of the T-
Cobbler to holes on the two sides of the board, then hook up pin16 and 10 of the two
74HC595 chips to VCC and pin 13 respectively, and pin 8 to GND.
Step 2: Connect pin 11 of the two 74HC595 together, and then to GPI O27; then pin 12 of the
two chips, and to GPIO18; next, pin 14 of the 74HC595 on the left side to GPIO17 and pin 9
to pin 14 of the other 74HC595.
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