Surrounding Brightness Remind Machine

About this machine:

If your surrounding is too dark which might harm your eyes, there will be sound to remind you.

• Arduino or Arduino Uno
• Breadboard
• Five wires
• Arduino Speaker (with wire)

• Connect the photoresistor as the picture show
  • the positive electrode (the longer end) to D Pin
  • the negative electrode (the shorter end) to the resistor

• Connect a wire from the negative sign(-) to the GND, and another wire from the positive sign(+) to 5V.

• Connect the speaker with the device
  • The black line connects to [GND]
  • The red line connects to [~11]

Elements you can change:

• You can change the reference value of brightness
  • The smaller the number, the darker the brightness
• You can change the key of sound the speaker play
  • If you think the sound is too sharp, you may change it into another key

The link below: https://create.arduino.cc/editor/annika_lin/106a2...

• Prepare a box or some cardboard
  • Based on the size of your device, cut the box into a suitable size (My box has length 17cm, width 13 cm, height 8 cm. But however it is too deep for this device, an ideal height is approximately 3 to 5 cm)
• Start to dig holes
  • You will have to dig 3 holes
    • 1. A hole through which the wire can pass
    • 2. A hole that show up the photoresistor
    • 3. One to two holes to stable the speaker outside of the box (let the wire of the speaker went through the holes from the outside first, then connect them to [GND] and [11~])

The final product should look like what the video showed.