Current and Voltage Sensing Design
3:14
Assessing connection task.
Planning screen connection.
Refining design intents.
Checking actions and parts.
Creating a connection plan.
Accessing knowledge base.
Reading docs about How to add a component from the Flux library to a schematic and connect it to existing terminals. Steps to search, place, and wire nets; using portals like Ground and 3V3..
Searching for components.
Finished searching for components.
Searching for components.
Finished searching for components.
Searching for a component.
Finished searching for a component.
Linking components.
- Drag components from the Parts Library onto the canvas.
- Connect them by clicking on a pin and dragging to another pin.
- Flux automatically assigns net names if you don’t label them. More details in the Getting Started – Schematic guide”
- I2C (simplest; 4 wires total):
- SPI (color TFT; faster refresh):
- VCC -> 3V3
- GND -> GND
- SDA -> GP4
- SCL -> GP5
- Pull-ups (I2C best practice, per KB): add two 4.7k Resistor, one from SDA to 3V3 and one from SCL to 3V3. Include pull up resistors on the SDA and SCL lines. Use a 4.7k resistor by default and keep the I2C bus capacitance ideally 3V3, GND -> GND
- SCK/MOSI/MISO/CS/DC/RST -> any free GP pins you will configure for SPI (example candidates: GP10, GP11, GP12, GP13; verify pin maps in the display datasheet).
- SPI best practice (per KB): add 22–33 Ω series resistors on SCK and MOSI near the Pico, for example 33 Ohm Resistor. Double check the detailed pin maps early to ensure accurate wiring of SPI signals by reading the ICs datasheet.
- Option A: Add oled 128x64 ssd1306 i2c and connect it to GP4/GP5 with two 4.7k Resistor pull-ups to 3V3.
- Option B: Add Adafruit 1.14" ST7789 (or ILI9341) and connect SPI plus control lines to chosen GPs with 33 Ohm Resistor series resistors on SCK/MOSI.
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