Schematic for Coil Winder Circuit Board Design: This project...

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

habentek

@copilot Check that none of the unconnected pins require pull-up or pull-down resistors to ensure proper function.

copilot

To check for the need for pull-up or pull-down resistors on unconnected pins, let's review the key components involved in your design:

Arduino Nano (U1): Most unconnected digital I/O pins on an Arduino Nano do not strictly require pull-up or pull-down resistors for proper function as the chip can configure its pins with internal pull-up resistors programmatically. However, it's good practice to consider them if a pin is intended to be used as an input to ensure it doesn't float, potentially picking up noise when unconnected. In your project, all digital and analog pins seem to be utilized, so there are no unconnected pins to worry about for the Arduino Nano specifically.
PC817C Optocoupler (Q1): The pins of Q1 are all connected, but for general advice, an optocoupler's input LED side (pins 1 and 2) would not need pull-up or pull-down resistors. For the output transistor side (pins 3 and 4), whether you need a pull-up resistor depends on your circuit design and what the output is connected to. In your circuit, the connections to the Arduino Nano seem to address proper function without additional resistors directly.
Switches (SW1, SW2, SW3, SW4): The use of pull-up or pull-down resistors for switches depends on how they are wired and the logic level you intend to read when the switch is open or closed. In many cases, pull-up resistors are used with switches to ensure a known logic level when the switch is open. Looking at the connections, it seems you have directly connected the switches to the Arduino Nano's pins. The Arduino Nano can use its internal pull-up resistors to ensure a known high level when the switch is open, so external resistors might not be necessary unless specified for a particular reason.
B3FS-1050P Tactile Switches and CRGCQ2010J10K Resistors: These are correctly placed in your design with connections that make sense for their intended use, with resistors likely being part of a debouncing circuit or for current limiting purposes.

Given this overview:

There don't appear to be unconnected pins that would require pull-up or pull-down resistors purely based on their unconnected status.
For the components and their specific functions, external pull-up or pull-down resistors might be optional depending on the specific behavior you're aiming for (such as for button inputs to the Arduino, which can utilize internal pull-up resistors).

Please confirm if there are specific pins you're concerned about or if there's a particular function you aim to achieve that might not be fully addressed here.

Resistance

410 Ω

SW1

Resistance

410 Ω

Resistance

10k Ω

Resistance

10k Ω

R12

Resistance

410 Ω

Resistance

10k Ω

R11

Resistance

410 Ω

R10

Resistance

410 Ω

SW2

SW4

SW3

Resistance

10k Ω

Resistance

410 Ω

Resistance

410 Ω

0.1uf

Capacitance

Resistance

410 Ω

Reviews

Electrical Rule Checks

Missing Footprints

Reports parts that have no footprint.

Design Rule Checks

Overlapping Copper • 28

Des	Net	Des	Net
D1:K	Net 1	D1:K	Net 3
D1:K	Net 1	D1:K	Net 23
D1:K	Net 3	D1:K	Net 23
D1:K	Net 4	D1:K	Net 1
D1:K	Net 4	D1:K	Net 3
D1:K	Net 4	D1:K	Net 5
D1:K	Net 4	D1:K	Net 6
D1:K	Net 4	D1:K	Net 7
D1:K	Net 4	D1:K	Net 9
D1:K	Net 4	D1:K	Net 23
D1:K	Net 5	D1:K	Net 1
D1:K	Net 5	D1:K	Net 3
D1:K	Net 5	D1:K	Net 9
D1:K	Net 5	D1:K	Net 23
D1:K	Net 6	D1:K	Net 1
D1:K	Net 6	D1:K	Net 3
D1:K	Net 6	D1:K	Net 5
D1:K	Net 6	D1:K	Net 9
D1:K	Net 6	D1:K	Net 23
D1:K	Net 7	D1:K	Net 1
D1:K	Net 7	D1:K	Net 3
D1:K	Net 7	D1:K	Net 5
D1:K	Net 7	D1:K	Net 6
D1:K	Net 7	D1:K	Net 9
D1:K	Net 7	D1:K	Net 23
D1:K	Net 9	D1:K	Net 1
D1:K	Net 9	D1:K	Net 3
D1:K	Net 9	D1:K	Net 23

Invalid Layer

Reports nodes that are assigned to a layer that doesn't exist in the layout stackup.

Component Overrides • 24

	Designator	Ruleset
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	CONN_1809267	Override rule for CONN_1809267

Airwires

Reports missing routed traces between pads in a net.

Deprecated Rules

Reports nodes that are using rules that are not supported anymore.

Layers with Multiple Fills

Reports layers that have multiple copper fills of different nets. Make sure the Connected Layers rule value of nets with fills is valid.

Floating Copper • 4

	Name
	Via
	Via
	Via
	Via

Protected Intrusions

Reports intrusions from objects of other nets into polygons or fills that have the Protected layout rule applied.

Manufacturing

Manufacturer Part Number • 9

	Designator	MPN
	0.1uf	None
	R5	None
	R6	None
	R7	None
	R8	None
	R9	None
	R10	None
	R11	None
	R12	None

Parts Available

Beta

Checks that all parts have a part number and are available from distributors.

System Checks

Auto-Layout

Beta

Reports issues with Auto-Layout if Flux cannot route something or must ignore a configuration.

Passive Components

Resistor Power Rating

Beta

Checks that the power traveling across a given resistor is under its rating with 50% headroom.

Learn more

Pull Up/Pull Down Presence

Beta

Checks that IC pins that require pull up or pull down resistors have them.

Learn more

Capacitor Voltage Rating

Beta

Checks that capacitors have appropriate voltage ratings to prevent overheating and ensure reliable circuit operation.

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 for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #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 10,000uF 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 20pF 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 for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
jharwinbarrozo
15.0k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

Inspect

Coil Winder Circuit Board Design

Controls

Properties

Power Requirements

USB V

Availability & Pricing

Distributor		Qty 1
	Digi-Key	$10.06–$19.13
	LCSC	$18.10–$18.14
	Mouser	$18.81

Assets

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