Write Schematic Section

[LBP311]

Walk through each subsystem in your schematic (with figures) and discuss. Use a level 3 header to separate each subsystem.

Make sure to update, to reflect any changes since DP1!

This section should address these course outcomes:

• [x] identify, formulate, & solve complex engineering problems by applying principles of engineering, science, & mathematics
• [x] acquire & apply new knowledge as needed, using appropriate learning strategies
• [x] Include complete schematic as Appendix D.

[LBP311]

Schematics for implementing the individual components were completed and will be attached at the end of this comment.

Task 3 coincides with Task 2, meaning Task 2 was partially completed. Task 2 now requires accompanying report portion to fully satisfy the requirement.

5-Pad Capacitive Touch Sensor Schematic:

LED Sequin Schematic:

Mini Piezo Buzzer Schematic:

Mini Vibrating Motor Schematic:

[LBP311]

@mrm815 Please review schematics. Feel free to provide any suggestions, improvements, etc. on them.

[LBP311]

Schematic Selection Tool The selection tool’s main components are five push-button switches, five 3mm LEDs, and a 12-pin female socket. The five push-button switches are colored as blue, gray, yellow, green, and red. Each switch uses a GPIO pin to read their respective switch state and are connected as follows: GPIO14 reads the state of the blue switch, GPIO15 reads the state of the white switch, GPIO23 reads the state of the yellow switch, GPIO24 reads the state of the green switch, and GPIO25 reads the state of the red switch. Each GPIO has a 470-ohm resistor in series and is then connected to a 10k-ohm resistor in parallel with the respective switch. The other side of the switch is connected to 3.3V. Each 3mm LED is in series with a 1k-ohm current-limiting resistor and a GPIO pin. Each 3mm LED is a different color and their GPIO connections are as follows: GPIO9 controls the green LED, GPIO10 controls the yellow LED, GPIO17 controls the white LED, GPIO27 controls the blue LED, and GPIO22 controls the red LED. From the 12-pin female socket, only five are used to send control signals to the components placed on the origami. The sockets are color-coded using the 3mm LEDs and would hold contain the necessary elements to operate each component as needed. The first socket is directly connected to ground. The third socket is used to operate two LED sequins and is connected using a 1k-ohm pull-down resistor in series with GPIO6. The sixth socket is used to send a PWM signal to the piezo. It is connected to a 220-ohm pull-down resistor in series with GPIO13/PWM0. Socket nine is +5V for to power the vibration motor. Socket twelve connects the vibration motor’s ground wire to the collector pin of a PN2222A transistor. The transistor is used to ensure that the amount of current needed by the motor does not pull more current than the Raspberry Pi can supply. The transistor’s base is in series with a 1k-ohm pull-down resistor and GPIO12/PWM1. The emitter is connected to ground. Sockets nine and twelve have a parallel 1N4007 diode connected to ensure that any voltage spikes or reverse voltage is not sent back to the transistor or Raspberry Pi and damaging them. Sockets two, four, five, seven, eight, ten, and eleven are covered with electrical tape to ensure that they are not in use. Note: The following subsystems all use alligator clips to connect the components on the creation to its respective socket on the selection tool subsystem. Singing Bird The bird uses the vibration motor, two LED sequins, and a piezo. The paper uses nylon tape to trace five connections. Ground is traced from the top of the paper for both LED sequins towards the lower, center of the paper to connect the piezo. LED traces are ran from inside the right wing of the bird up to the head for both LED sequins. The LED and ground traces connect the LED sequins in parallel. The positive wire of the piezo has a trace pad from the inside of the right wing below the LED trace. The motor is placed inside the left wing of the bird with two trace pads, one for the positive wire and one for the negative. Bejeweled Crown The crown was not fully completed but each unit would hold three LED sequins. They would all be in parallel and placed on a single edge of the unfolded unit. The folded unit would show the LED trace to go along the edge of the large triangle down to the top of the unit’s insertion slot. The ground trace will run along the opposite side of the paper to the lower portion of the bottom of the unit’s insertion slot. The master unit would end its traces here. Other units would extend the traces inside the slot to the outer portion to ensure that other connected units will also be connected within the circuit. The circuit relies on the slight fold of the paper to ensure that the circuit remains intact. Singing Head The head uses two LED sequins and the piezo. The LED sequins are in parallel with the LED and ground trace running from the top of the head to the bottom of the creation hidden within all the folds. The piezo is placed within the lower portion of the mouth with its traces running to the outside of the mouth down to the bottom of the creation.

[LBP311]

Appendix D.zip