Every year at 14 February we celebrate the Valtentine’s day with our loved person. Usually we make a gift to each other to show our love to her/him. This can be a flower, chocolate or other stuff. Here we propose a different kind of gift to give her. That is a hand crafted LED chaser in a heart shape, so it’s has additional emotional value for her.
Description The led chaser is build on a perfboard using 10 leds, CD4017 decade counter, a 555 timer configured in astable mode and some additional components. The circuit is really simple. On the left we see the NE555 timer IC configured in astable mode, producing a squarewave which frequency is defined by the resistor array and C1 capacitor. Trimming R4 we are able to change the velocity of the running LEDs. From: http://www.electronics-lab.com/project/valentine-led-chaser/