Introduction: Circadian Light

I have made a Circadian Light using a Raspberry Pi Pico to control of the LEDs, and made a frame out of wood and 3D print.

Supplies

Tools

  1. Soldering Iron and Wire

Electronics

  1. Raspberry Pi Pico
  2. Neopixel Stick x 2
  3. 6 Wires (Two Red, Two White, Two Black)

Lamp

  1. 3D Printed Lamp Shade

Step 1: Wire Neopixels

Wire and solder between the two Neopixels, attaching GND to GND, DOUT to DIN and 5VDC to 5VCD.

Step 2: Wire Neopixels to Raspberry Pi Pico

Wire and solder:

Neopixel GND to Raspberry Pi pin 40 (GND)

Neopixel 5VCD to Raspberry Pi pin 38 (VBUS)

Neopixel DIN to Raspberry Pi pin 1 (GP0)

Step 3: Test Code

import machine

import neopixel

import time


# Configuration

NUM_PIXELS = 16 # Change if your NeoPixel stick has more LEDs

PIN_NUM = 0 # GPIO0 = physical pin 1


# Initialize NeoPixel

np = neopixel.NeoPixel(machine.Pin(PIN_NUM), NUM_PIXELS)


# Helper to set all pixels to a color

def set_all(r, g, b):

for i in range(NUM_PIXELS):

np[i] = (r, g, b)

np.write()


# Fade in/out function

def fade_to_color(r_target, g_target, b_target, steps=50, delay=0.02):

for i in range(steps + 1):

r = int(r_target * i / steps)

g = int(g_target * i / steps)

b = int(b_target * i / steps)

set_all(r, g, b)

time.sleep(delay)


def fade_off(steps=50, delay=0.02):

current = np[0] # Assuming all same color

r0, g0, b0 = current

for i in range(steps, -1, -1):

r = int(r0 * i / steps)

g = int(g0 * i / steps)

b = int(b0 * i / steps)

set_all(r, g, b)

time.sleep(delay)


# Main loop

while True:

# Fade into blue

fade_to_color(25, 100, 255)

time.sleep(3)


# Fade off

fade_off()

time.sleep(2)

# Fade into orange

fade_to_color(255, 100, 0)

time.sleep(3)


# Fade off

fade_off()

time.sleep(2)



Code similar to the final code, to make sure all connections are correct and working, if all works continue to next step.

Step 4: Enter Final Code

import machine

import neopixel

import time


# Configuration

NUM_PIXELS = 16 # Change if your NeoPixel stick has more LEDs

PIN_NUM = 0 # GPIO0 = physical pin 1


# Initialize NeoPixel

np = neopixel.NeoPixel(machine.Pin(PIN_NUM), NUM_PIXELS)


# Helper to set all pixels to a color

def set_all(r, g, b):

for i in range(NUM_PIXELS):

np[i] = (r, g, b)

np.write()


# Fade in/out function

def fade_to_color(r_target, g_target, b_target, steps=50, delay=0.02):

for i in range(steps + 1):

r = int(r_target * i / steps)

g = int(g_target * i / steps)

b = int(b_target * i / steps)

set_all(r, g, b)

time.sleep(delay)


def fade_off(steps=50, delay=0.02):

current = np[0] # Assuming all same color

r0, g0, b0 = current

for i in range(steps, -1, -1):

r = int(r0 * i / steps)

g = int(g0 * i / steps)

b = int(b0 * i / steps)

set_all(r, g, b)

time.sleep(delay)


# Main loop

while True:

# Fade into orange

fade_to_color(255, 100, 0)

time.sleep(3600)

# Fade off

fade_off()

time.sleep(36000)

# Fade into blue

fade_to_color(25, 100, 255)

time.sleep(3600)


# Fade off

fade_off()

time.sleep(46800)

Step 5: Print 3D Model Lamp

Print Lamp Shade with Clear 3D laminate.

Print Electronics Holder with Black/Neutral coloured 3D Laminate

Attachments

Step 6: Assemble

Assemble all the pieces