PCB Design - Altium

[digitaldanny]

Describe the solution you'd like

• Create HW schematic for each of the modules in milestone 3. These should be getting completed while working on each module.
• Place components for PCB 1 draft and place order at JLCPCB by 2/28/21.

[digitaldanny]

These are the crystal oscillators for the MSP432.

• CRYSTAL 32.7680KHZ 12.5PF SMT, Digikey SER4071CT-ND
• CRYSTAL 48.00 MHZ 12.0PF SMD, Digikey FA-238 48.0000MB-W0-ND

[digitaldanny]

Glove PCB Parts to Order

Part	PCB Designator(s)	Quantity
4.7 uH inductor	L?	?
32.7680 kHHz Crystal	LFX	1
48.00 MHz Crystal	HFX	1
MSP432P401RIPZR	U?	1
1.5 uH inductor	L2	1
4.7 uH inductor	L1	1

[digitaldanny]

Charger PCB Parts to Order

Part	PCB Designator(s)	Quantity
?	?	?

[digitaldanny]

MSP432 Pinout

MSP432 Pin	Pin Mux Function	Description
P1.6	3-pin SPI	LCD MOSI
P1.5	3-pin SPI	LCD clock
P2.3	GPIO	LCD register select (RS)
P5.1	GPIO	LCD reset (active high)
P3.5	GPIO	LCD chip select (active low)
-	-	-
P3.7	GPIO	Flex mux sel0
P4.1	GPIO	Flex mux sel1
P4.6	GPIO	Flex mux sel2
P5.5	GPIO	Flex ADC
-	-	-
P3.3	UART TX	HC-05 Rx
P3.2	UART RX	HC-05 Tx
P6.6	GPIO	HC-05 State

[digitaldanny]

MSP432 Launchpad Power Supplies

VCC (DVCC) • External • Primary chip supply voltage • Supplies the I/Os and VCORE regulator

VCORE • Internal – programmable • Integrated voltage regulator to generate core voltage • Supplies the CPU, memories, and digital modules,

AVCC • External • Supplies the analog modules

[digitaldanny]

Because I am using mostly thru-hole components for the prototype, the glove PCB is taking up way too much space to fit on the back of a hand. The PCB screenshot below shows a 3.5 x 4 inch PCB that cannot even fit all the components (leaving space for the LCD).

My plan is to split up the glove into two PCBs. The only part that actually needs to be on the back of the hand is the IMU components. The rest can be moved to a long and narrow PCB that can be mounted on a wrist strap. The IMU PCB can be connected to the wrist PCB with some wires.

[digitaldanny]

**Update on previous comment.

Will just be using the IMU breakout board instead of making a custom PCB for the IMU.

[digitaldanny]

Borrowed Components

Component	Description	Quantity
LM317T	Adjustable Linear Regulator	3
INA114AP	In-Amp	1
PO3P4L	High-Power PCh MOSFET	1
AD8226	Single Supply In-Amp	1

[digitaldanny]

This is the 2nd revision of the glove PCB after removing the IMU hardware with a compile mask. I tried autorouting this, but Altium could only complete 66% of connections. I messed around with manually connecting the rest, but it looks like there is not enough space on the board to finish. I think I will need to increase the PCB size from 2.5 x 5 inches to something wider, which will not fit on the forearm very easily.

[digitaldanny]

Completed and submitted both PCBs. Currently completing a final Digikey order for some components I am missing or need more of. Both PCBs are shown below with the copper pours removed.

NOTE: I ended up being able to keep the glove PCB the same size by changing the routing width to 7.5 mils. The MSP432 pins were less than 10 mils, so routing was not working when routing at 10 mil width.

Charger PCB

Glove PCB