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Component Selection

List of Final Major Components:

Part Name/Description	Unit Quantity
TC74 I2C Temperature Sensor Digital	1
JSX5300-370 5V DC MOTOR	1
IFX9201SGAUMA1 Full Half-Bridge Drivers	1
LM2575 Voltage Regulator	1
WSU050-4000 AC/DC Convertor	1
PIC16LF15376-I/PT Microcontroller	1
MCP3562-E/ST SPI ADC	1
NCV321SN3T1G Op-Amp for Force Sensor	2
DF9-40 Force Sensors	2

Description: This section is used to document the components used in our design. This is very important for the entire team to have access to because our subsystems have to work together. If even one component is incorrectly selected it could ruin or break the project. The table above shows the main components used in our design, but this is far from a comprehensive list, it only includes the most important parts. The rest of the selected components can be found in the appendix.

All parts meet the requirements and unless specified otherwise are surface mounted. Everything from the voltage regulators to the op-amp are surface-mounted. The only parts that aren’t surface mounted are the barrel jack, motor, and wall plug to supply power to the device. A variety of communication methods are utilized such as SPI, UART, and I2C. Our wall power supply supplies voltage at a measurement of 5V and 1A to a switching voltage regulator. From the switching voltage regulator the power drops down and comes out to 3.3 V. Our force sensors are resistive which utilize an ADC device to convert their analog signals to SPI so it can be read by the microcontroller. The ESP32 utilizes UART to communicate all this data over Wi-Fi bidirectionally to a MQTT server. The server could be potentially on someone’s personal device or the medical records system at a doctor’s office.

Power Budget Table:

Power Budget
Team Number:	208
Project Name:	Nerve Damage Thearpy Glove
Team Member Names:	Miles Wilson, Kyle Selasky, Mingqi Yu, Felicia Szleszinski
Version:	1
A. List ALL major components (active devices, integrated circuits, etc.) except for power sources, voltage regulators, resistors, capacitors, or passive elements
All Major Components	Component Name	Part Number	“Supply
Voltage
Range”	#	“Absolute
Maximum
Current (mA)”	“Total
Current
(mA)”	Unit
	Force Sensor	GHF-10	+3.3-5V	3	100	300	mA
	Force ADC SPI Chip	MCP3562RT-E/ST	1.8-3.6V	1	100	100	mA
	Temperature Sensor	HIH6030-021-00	+2.7-5.5V	1	650	650	mA
	Motor	JSX5300-370	+5V to -5V	1	240	240	mA
	Motor Driver	IFX9201SGAUMA1	0-50V	1	500	500	mA
	ESP32	ESP32­WROOM­32	3-3.6V	1	150	150	mA
	Switching Regulator	LM2575	+2.3-6V	1	7	0.08	mA
“B. Assign each major component above to ONE power rail below. Try to minimize the number of different power rails in the design.
Add additional power rails or change the power rail voltages if needed.”
+3.3V Power Rail	Component Name	Part Number	“Supply
Voltage
Range”	#	“Absolute
Maximum
Current (mA)”	“Total
Current
(mA)”	Unit
	Force Sensor	GHF-10	+3.3-5V	3	100	300	mA
	Temperature Sensor	HIH6030-021-00	+2.7-5.5V	1	650	650	mA
	Force ADC SPI Chip	MCP3562RT-E/ST	1.8-3.6V	1	100	100	mA
	ESP32	ESP32WROOM32	3-3.6V	1	150	150	mA
						0	mA
	Subtotal					1200	mA
	Safety Margin					25%
	Total Current Required on +3.3V Rail					1500	mA
c1. Regulator or Source Choice	+3.3V Switching Regulator	LM2575	4.75V-40V	3.3	1000	3300	mA
	Total Remaining Current Available on +3.3V Rail					1800	mA
C. For each power rail above, select a specific voltage regulator using the same process as for major component selection. Confirm that the Total Remaining Current Available on each rail above is not negative.
D. Select a specific external power source (wall supply or battery) for your system, and confirm that it can supply all of the regulators for all of the power rails simultaneously. If you need multiple power sources, list each separately below and indicate which regulators will be connected to each supply. Confirm that the Total Remaining Current Available on each power source below is not negative.
External Power Source 1	Component Name	Part Number	“Supply
Voltage
Range”	Output Voltage	“Absolute
Maximum
Current (mA)”	“Total
Current
(mA)”	Unit
Power Source 1 Selection	Plug-in Wall Supply	WSU050-4000	90 ~ 264 VAC	5V	4000	4000	mA
Power Rails Connected to External Power Source 1
	+3.3V Switching Regulator	LM2575	4.75V-40V	3.3	1000	3300	mA
	Motor Driver	IFX9201SGAUMA1	5V-50V	5V	500	500
	Total Remaining Current Available on External Power Source 1					200	mA
E. Calculate Battery Life (if applicable). For each battery, also check the worst-case lifetime of the battery by indicating the capacity in mAh.
	Component Name	Part Number	“Supply
Voltage
Range”		“Capacity
(mAh)”	“Required
By
Regulators”
	N/A	N/A	N/A	N/A	N/A	N/A
					Battery Life	N/A	hours
Notes
External Supply Voltage should be determined by the dropout voltage for highest-voltage regulator (e.g., +14V for a +12V regulator).
If you have multiple units in your design (e.g., a base unit and remote unit) then you need a separate power budget for each unit

Description: The power budget is used to estimate how much current all major components use. This gives the team a good idea of how much power each power rail needs. This is espically helpful when selecting the power supply method, components, and values. We concluded in our power budget that the device has adequate current values on each power rail (3.3V and 5V). There is a 25% safety margin on the currents as well to account for sudden drops in current for any reason.