Running Python 3 Donut Display

Thought

flux

Work completed

Updated project description with Raspberry Pi integration notes and USB-C serial usage.
Refreshed the System Architecture diagram in the project property.
Added Raspberry Pi Zero 2 W 40-pin header as J_PIZERO.
Placed USB-C receptacle (Molex 2024100002) as J_USB_C.
Added CC pull-downs R2 and R4.
Placed bidirectional TVS diodes on D+ and D– as D1 and D2.
Added input protection fuse F1.
Inserted 5 V buck regulator U2 (LMR50410Y5FQDBVRQ1) with passives C3, C4, L1.
Added 3.3 V LDO U3 (AMS1117-3.3) with decoupling C2.
Maintained original ESP32↔E-Ink nets without alteration.
Created UART link with 47 Ω series resistors R6 and R7 between Pi GPIO14/15 and ESP32 TX/RX.
Repurposed SW1:2 through pull-up R1 to Pi GPIO17; SW1:1 remains on ESP32.
Added status LED LED1 with current-limit resistor R5 on Pi GPIO18.
Added 3-pin debug header as J_DBG with TX, RX, GND.
Ran ERC checks and updated capacitor voltage ratings and resistor power ratings where flagged.

Success criteria

✅ Pi header exposes all required rails/signals (+5 V, 3.3 V, UART, LED, button GPIO).
✅ USB-C interface implemented with CC resistor pull-downs and ESD protection.
✅ UART link between Pi and ESP32 with series resistors is reliable.
✅ Original ESP32 + E-Ink functionality is preserved.
✅ Status LED and repurposed button trigger the Python ANSI animation; USB-C serial outputs frames.

Next step

Conduct a final ERC/DRC pass to ensure net connectivity, decoupling, and compliance. Once clean, proceed to PCB layout preparation.

Check that none of the unconnected pins require pull-up or pull-down resistors t...

Someone is typing...

What does this do?

Someone is typing...

list all ICs and the decoupling capacitors attached to each. Ensure to include a...

Someone is typing...

explain this project.

Someone is typing...

please explain what U1 does.

Someone is typing...

how do I use Flux?

Someone is typing...

E_INK_SDI

F1 P2 - J_PIZERO 5V[1]

E_INK_CS

J_PIZERO GND[3] - J_PIZERO GND[4]

E_INK_DC

R5 P2 - LED1 A

ESP1 TXD0 - J_PIZERO TXD0/GPIO14

J_PIZERO GPIO18 - R5 P1

R3 P1 - J_PIZERO GPIO17/GEN0

E_INK_SDI

F1 P2 - J_PIZERO 5V[1]

E_INK_BUSY

+3V3

J_USB_C GND4 - U2 GND

E_INK_DC

J_USB_C VBUS1 - U2 VIN

J_PIZERO GND[7] - J_PIZERO GND[8]

SWITCH

E_INK_CLK

R3 P1 - J_PIZERO GPIO17/GEN0

J_PIZERO GND[7] - J_PIZERO GND[8]

F1 P2 - J_PIZERO 5V[1]

J_PIZERO GND[7] - J_PIZERO GND[8]

E_INK_BUSY

J_PIZERO GND[7] - J_PIZERO GND[8]

E_INK_CS

+3V3

J_USB_C GND4 - U2 GND

J_USB_C VBUS1 - U2 VIN

ESP1 TXD0 - J_PIZERO TXD0/GPIO14

+3V3

SWITCH

J_DBG Pin_2 - J_PIZERO RXD0/GPIO15

E_INK_CLK

J_USB_C GND4 - U2 GND

J_PIZERO GND[7] - J_PIZERO GND[8]

SW1

Resistance

500 Ω

Capacitance

Resistance

500 Ω

Resistance

500 Ω

Capacitance

Resistance

500 Ω

Resistance

500 Ω

E-Ink

Resistance

1kΩ

End of Life

Resistance

10kΩ

J_USB_C

ESP1

J_USB_C

+3V3

J_UART

J_PIZERO

+3V3

Capacitance

0.001uF

Reviews

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
16.2k
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 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
Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
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
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
1070TR
Battery Holder (Open) Coin, 20.0mm 1 Cell SMD (SMT) Tab bate or batt #forLedBlink
jharwinbarrozo
700.5k

Project Name

Smart Button with E-Ink display

Description

Smart Button Terminal Animator: ESP32 & Raspberry Pi Zero 2 W Edition

Properties

System Architecture

Diagram

System Architecture

Diagram

License

creativecommons.org/licenses/by/4.0/

Pricing & Availability

Distributor	Qty 1
Arrow	$6.55–$11.62
Digi-Key	$17.13–$17.79
LCSC	$8.88–$9.02
Mouser	$13.19
TME	$0.60
Verical	$6.62–$10.54

Controls

Welcome 👋

Flux helps you build PCBs faster with an AI teammate!

Create your account to collaborate, stay updated, fork your own version, and get instant answers from our AI agent.

vasy_skral / Smart Button with E-Ink display

Schematic