Materials
Shift register
8 LEDs
8 330R resistors
19 wires
Procedure
Place the shift register on the breadboard, splitting the 2 rows of pin by the “panama canal”
Place the 8 LEDs on the breadboard on the side WITH the serial number and put the negative (shorter) leg on the negative strip on the breadboard
Place a resistor (for each LED) from the positive leg of the LED to the other side of the breadboard
Place a wire from the non-serial side (shift resistor pin 1,2) to the first LED
Place another wire from the serial side (shift resistor pin 2,1) to the second LED
Place another wire from the serial side (shift resistor pin 2,2) to the third LED
Place another wire from the serial side (shift resistor pin 2,3) to the fourth LED
Place another wire from the serial side (shift resistor pin 2,4) to the fifth LED
Place another wire from the serial side (shift resistor pin 2,5) to the sixth LED
Place another wire from the serial side (shift resistor pin 2,6) to the seventh LED
Place another wire from the serial side (shift resistor pin 2,7) to the eighth LED
Place another wire from the serial side (shift resistor pin 2,8) to the negative strip of the breadboard on that side
Place another wire from the non-serial side (shift resistor pin 1,1) to the positive strip of the breadboard on that side
Place another wire from the non-serial side (shift resistor pin 1,3) to the pin 8 on the processor
Place another wire from the non-serial side (shift resistor pin 1,4) to the negative strip of the breadboard on that side
Place another wire from the non-serial side (shift resistor pin 1,5) to the pin 9 on the processor
Place another wire from the non-serial side (shift resistor pin 1,6) to the pin 10 on the processor
Place another wire from the non-serial side (shift resistor pin 1,7) to the positive strip of the breadboard on that side
Place the final wire connecting from the negative strip on the breadboard on one side to the other
Explanation
Today, we finished learning about the shift register. We created sequences which is pretty self-explanatory but it’s a pattern that the lights turn on in. Ex: 1, 2, 4, 8, 16, 8, 4, 2, 1. You have to use these numbers because the shift register uses the 8-bit system. We created 4 sequences, one of which we made on our own, and set them to random using a switch statement.
Reflection
Today was pretty good once I fixed my short circuit. I had the shift resistor backwards. Also, one of my prongs broke so I had to get another one from Ms. Suarez. Other than that minor complication, the coding was good and I used some old code if I got stuck.