Making a colour detector

Recently, I decided to make a colour detector, which might come in handy if ever we need it to follow a coloured line.

The idea was simple: have 4 coloured LEDs ( red, green, yellow, blue) connected through resistors to an Arduino. Have an LDR in between them, connected to high voltage with another resistor in series. Now make the LEDs shine one at a time for an equal interval of time each. Read the voltage across the LDR, which changes based on the color which the entire setup faces. Calibrate it by setting thresholds for each colour you wish to measure, and we’re done!

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: