3 Review(s)

This is Automatic day indicator circuit, by LED display each day one by one LED. Which use principal of light-activated in day with sun. To set a LDR-sensor and CD4017 acts as drive LED of 7 pcs for 7 day there. Sometimes that we enjoy working and forget days. Which may missed important appointments. Because do not remember what day it was (Sunday – Saturday).This project is a few components so can put in an universal PCB board. So, the wiring and various parts. So be careful for the polarity of the electrolytic capacitors, transistor correctly and so Pin of the IC-4017 is not error.