Many of us see different kinds of wall clock available in market which produces sound but they are very expensive. The circuit described here produces a tick tock sound and also indicate the time with the help of LED. In this circuit, LED’s are arranged such that you will get time in the form of a pendulum first in one direction than in opposite direction. So you can make your own watch in much less price as compared to market.This simple circuit is based on two IC’s namely NE555 timer and CD4017 with few more discrete components. 555 timer IC wired as an a-stable oscillator. In this circuit NE555 a-stable generates a clock for the Circuit, which provide a oscillating wave to the output pin 3 of IC1. You can vary the speed of oscillation with the help of R2.
LED Based Pendulum Circuit
The circuit is based on two IC’s namely NE555 and CD4017 with few more components. where 555 timer IC is wired as an astable oscillator. CD4017 is a CMOScounter/ divider IC which takes clock signal from the clock input and turns on the10 output in sequence, each time when it receives clock input pulses. It is the most popular IC and is extremely useful in various project like Light Chaser, Matrix Die.The circuit is based on two IC’s namely NE555 and CD4017 with few more components. where 555 timer IC is wired as an astable oscillator. CD4017 is a CMOS counter/ divider IC which takes clock signal from the clock input and turns on the10 output in sequence, each time when it receives clock input pulses. It is the most popular IC and is extremely useful in various project like Light Chaser, Matrix Die.