Control PCB Design for Medical Sterilizer

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COMMS Interfaces Summary

Table

Interface	Component(s) & Ref.	Connections & Support
HMI UART1 Header	J6; Bulk cap C21	Pin_1=+5V→+5V, Pin_2=GND→GND; Pin_3=TX→U3:PD3; Pin_4=RX→U3:PD2; bulk 1000 µF
Printer UART2 Header	J7	Pin_1=+5V→+5V; Pin_2=GND→GND; Pin_3=TX→U3:PH1; Pin_4=RX→U3:PH0
Micro SD Socket & Protection	J8; ESD D1; series resistors R13, R14, R15, R16	U3:MOSI→R13→ESD→J8:DI; U3:MISO→R14→ESD→J8:DO; U3:SCK→R15→ESD→J8:SCK; U3:SS→R16→ESD→J8:CS
DS3231 RTC w/ VBAT	U4; bypass C22; VBAT holder J9	+5V→U4:VCC via C22; GND→U4:GND; SDA→I2C SDA net; SCL→I2C SCL net; VBAT→J9

Success Criteria Review

✅ All COMMS headers, SD socket, ESD, DNP resistors, bulk cap, bypass cap, and RTC components are placed.
✅ Correct pin mappings to U3 (PD3/PD2, PH1/PH0, MOSI/MISO/SCK/SS) verified.
✅ I2C pull-ups (R11/R12) remain active on SDA/SCL nets.
✅ COMMS_Pinouts property reflects all interfaces and reference designators.

Next Step With the COMMS sheet complete, shall I prepare the board for PCB layout?

184 days

C15

Capacitance

U3 VCC - C1 P1

U4 VCC - C22 P1

D1 2 - GND GND

Capacitance

R4 P1 - R8 P1

J24V_IN 1 - D1 1

D1 2 - GND GND

C13

Capacitance

J4 Pin_2 - U3 PH0

D1 2 - GND GND

R5 P1 - C18 P2

R13 P2 - J8 DI

J4 Pin_1 - U3 PH1

U2 OUT - C6 P1

R3 P1 - R7 P1

J3 Pin_2 - U3 PD2

D1 2 - GND GND

C20

Capacitance

U3 VCC - C1 P1

R6 P1 - C19 P2

U4 VBAT - J9 POS

U3 XTAL1 - C7 P1

Capacitance

U3 AVCC - L1 P2

R6 P1 - C19 P2

R13 P2 - J8 DI

C19

Capacitance

C18

Capacitance

D1 2 - GND GND

J3 Pin_2 - U3 PD2

U3 VCC - C1 P1

U3 ~RESET - SW1 P1

C22

Capacitance

D1 2 - GND GND

R3 P1 - R7 P1

D1 2 - GND GND

R4 P1 - R8 P1

C11

Capacitance

R15 P2 - J8 SCK

U3 XTAL1 - C7 P1

J3 Pin_1 - U3 PD3

J4 Pin_2 - U3 PH0

R13 P2 - J8 DI

U3 VCC - C1 P1

C10

Capacitance

U3 ~RESET - SW1 P1

R14 P2 - J8 DO

D1 2 - GND GND

U4 VCC - C22 P1

R13 P2 - J8 DI

D1 2 - GND GND

C21

Capacitance

C17

Capacitance

18pF

U2 IN - C5 P1

D1 2 - GND GND

R15 P2 - J8 SCK

C16

Capacitance

J24V_IN 1 - D1 1

U3 XTAL1 - C7 P1

Capacitance

18pF

J3 Pin_1 - U3 PD3

U3 XTAL1 - C7 P1

Capacitance

U3 VCC - C1 P1

C14

Capacitance

R5 P1 - C18 P2

J4 Pin_1 - U3 PH1

C12

Capacitance

Resistance

500 Ω

J24V_IN

SW1

Resistance

500 Ω

Resistance

500 Ω

Resistance

500 Ω

GND

Inductance

R14

Resistance

500 Ω

Resistance

500 Ω

Resistance

500 Ω

Resistance

500 Ω

Resistance

500 Ω

R15

Resistance

500 Ω

Inductance

R10

Resistance

500 Ω

Resistance

500 Ω

R16

Resistance

500 Ω

R13

Resistance

500 Ω

Not Recommended for New Designs

Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
jharwinbarrozo
15.8k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
General Purpose Thick Film Standard Power and High-Power Chip Resistor 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film Features: - RMCF – standard power ratings - RMCP – high power ratings - Nickel barrier terminations standard - Power derating from 100% at 70ºC to zero at +155ºC - RoHS compliant, REACH compliant, and halogen free - AEC-Q200 compliant
jharwinbarrozo
1.2M
875105359001
10 µF 16 V Aluminum - Polymer Capacitors Radial, Can - SMD 30mOhm 2000 Hrs @ 105°C #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric)
jharwinbarrozo
1.1M

Project Name

Description

Sterilizer Control PCB v0 – Enhanced Communication and Peripherals Interfaces

Properties

Load Cap…ignator

I2C SDA …nections

I2C SCL …nections

Load Cap…r 1 Nets

Digital Outputs

MCU_IO_R…ep 2.3)

MCU_IO_R…ep 2.2)

System Architecture

Diagram

UART2 Header

Load Cap…r 2 Nets

Load Cap…ignator

Series Re…tor Nets

Crystal Nets

PWR_24V…_Issues

PWR_24V…eviews

Crystal Designator

System Architecture

Diagram

UART1 Header

Condition…l Inputs

PWR_24V…eviews

ESD_Pro…on_Note

Series Re…signator

PWR_24…ummary

SPI Inte… Mapping

MCU Designator

PWR_24V…_Issues

MCU_IO_R…ep 2.4)

Conditio…put ToDo

COMMS_Pinouts

Pricing & Availability

Distributor	Qty 1
Arrow	$28.53–$37.92
Digi-Key	$41.35–$43.22
LCSC	$24.30–$25.35
Mouser	$25.89–$26.57
TME	$22.84
Verical	$34.21–$45.33

Controls

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