Supplies

• A Raspberry Pi Pico
• A Rotary Encoder OR A Stepper Motor
• *A Stepper Motor to Rotary Encoder Converter
• ^A 4-digit, 7-segment, LED display
• 4 200Ω resistors
• Male to male breadboard hook-up wires
• 4 male to female jumper wires(For connecting the rotary encoder to Pico.)

*You can either use a simple incremental rotary encoder or you can use a stepper motor instead by following this guide.

^You can use either a common-anode or common-cathode display, but you will need to specify it in the code in the following function:

sevseg.begin(COMMON_ANODE, numDigits, digitPins, segmentPins);

Step 1: Program the Pico

You can get the Arduino code from here.

You can learn how to program the Raspberry Pi Pico using the Arduino IDE from here.

Step 2: Study the Circuit Schematic and Make the Wiring Connections

Start by installing the Pico on the breadboard, followed by the LED display. Then, make the wiring connections by following the above circuit schematic. Make sure all the wiring connections are correctly made and are not loose.

Step 3: Connect the Rotary Encoder to the Setup

If you are using a rotary encoder, then you need to connect it to the Pico as shown in the circuit schematic in the previous step.

If you are using a stepper motor as a rotary encoder, then you will need to connect the amplifier board instead in the same way as a rotary encoder to the Pico as shown in the previous step. You can learn more here.

Step 4: Connect the Stepper Motor to the Amplifier

If you are using a rotary encoder, then you can skip this step.

Connect the stepper motor to the amplifier board by following the above schematic.

Step 5: Power Up the Setup and Test it

After powering up, check if the display is showing a digit '0' with a decimal point. Then check if your setup is working as shown in the above video.

I hope you enjoyed making this project. Thanks for coming by!