Relay and Lighting Setup

flux

I’ll add a 5V SSD1306 I2C header (GND,VCC,SCL,SDA) plus two ULN2003A input headers, with I2C pull-ups.
Clarify:
  • ULN2003A header pin order OK as IN1,IN2,IN3,IN4,VCC,GND?
  • Mark the I2C pull-ups as DNP in case the SSD1306 module already has them? Click Start and I’ll execute.
D

dgrosen2

ULN2003A header pin order OK as IN1,IN2,IN3,IN4,VCC,GND
Mark the I2C pull-ups as DNP in case the SSD1306 module already has them. execute.

flux

I’ll add a 5V SSD1306 I2C header and two ULN2003A input headers, with DNP 4.7k pull-ups, wired to your Nano.
Click Start on the plan bar to execute.
D

dgrosen2

Use D4–D7 and D8–D11 as you suggested for the ULN2003A inputs,

flux

I’ll add a 5V SSD1306 I2C header and two ULN2003A input headers, with DNP 4.7k pull-ups, wired per your pin choices.
  • SSD1306 4-pin header [GND, VCC, SCL, SDA] → GND, 5V, A5, A4.
  • Two 4.7k Resistors as DNP pull-ups: A4→ 5V, A5→ 5V.
  • ULN2003A header 1 (IN1,IN2,IN3,IN4,VCC,GND): IN1..IN4 → D4–D7; VCC→ 5V, GND→GND.
  • ULN2003A header 2 (IN1,IN2,IN3,IN4,VCC,GND): IN1..IN4 → D8–D11; VCC→ 5V, GND→GND.
Click Start on the plan bar and I’ll execute these changes.
Confirm pin mapping
Ask about I2C pull-ups
Clarify header orientation
Ask about current limits
Add decoupling caps
Sign up to send

Files

Pins

Symbol

Layout

3D View

AREF
RESET
COM/GND
A1
D12/MISO
D13/SCK
D1/TX
A0
RESET__1
D5
D3
D9
A2
VIN
A3
A7
A6
+5V
D10
D4
D0/RX
D8
COM/GND__1
A5
D7
D11/MOSI
3V3
A4
D2
D6
Name
Pin #
Type
Current
Max Current
Part Type
Pin Orientation
Section
D1/TX
1
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
D0/RX
2
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
RESET
3
Input
0.02A
0.02A
Terminal
Top
Power
COM/GND
4
Power In
0.5A
0.5A
Terminal
Right
Power
D2
5
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
D3
6
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
D4
7
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
D5
8
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
D6
9
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
D7
10
Bi-Directional
0.02A
0.02A
Terminal
Right
GPIO
D8
11
Bi-Directional
0.02A
0.02A
Terminal
Right
GPIO
D9
12
Bi-Directional
0.02A
0.02A
Terminal
Right
GPIO
D10
13
Bi-Directional
0.02A
0.02A
Terminal
Right
GPIO
D11/MOSI
14
Bi-Directional
0.02A
0.02A
Terminal
Right
GPIO
D12/MISO
15
Bi-Directional
0.02A
0.02A
Terminal
Right
GPIO
D13/SCK
16
Bi-Directional
0.02A
0.02A
Terminal
Right
GPIO
3V3
17
Power In
0.5A
0.5A
Terminal
Top
Power
AREF
18
Input
0.02A
0.02A
Terminal
Top
Power
A0
19
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
A1
20
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
A2
21
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
A3
22
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO
A4
23
Bi-Directional
0.02A
0.02A
Terminal
Left
GPIO

D11/MOSI