Day Night Sun Sensor Made of Potentiometer LED LDR No Microcontroller

This is a tutorial for building a sensor, that indicates day, night and light intensity.

Step 1: Materiallist & Schematics

What you need:

Power Source (USB TTL Module 3,3V OUT)

Breadboard

Jumper Wire

Potentiometer ( to trigger sensibility of dark sensor)

3 X LED in prefered colour

3 X LDR

Plug all together as shown in schematics and test it.

Comments

[discostu956]

do you mind explaining how this works? Just intrigued by the LDR in parallel with the LED and how that works

[bastelking]

Hello friend,

the dark sensor in the middle with LDR and LED works like this:

When light shines at the LDR, it lets elctricity pass through. So when the Potentiometer is adjusted right, the LDR passes electricity around the LED so it can´t glow. When it´s dark the LDR don´t let the power through so the LED gets enough to glow.

[discostu956]

Thanks, much appreciated. I figured that must have been how it works, just wasn't sure electricity worked that way. I'm obviously still learning the basics of electronics

[seamster]

Very nice!

[bastelking]

THX