Recent content by Zahraa17

Hi...can anyone tell me whether there is a decade counter which has only 1 input, 10 outputs and an up/down clock?

i can't see a way.

the schematic circuit i showed you is given. but modifications have to be done in order to do that two-way chase. and the 4017 is to be used.

can you make it clearer?

The 555timer sends a pulse to the 4017. The 4017 then steps the output from negative to positive in a series of ten steps, with only one pin being on at a time. the 4017 counts up to a certain number and then restarting the count.

no the 4017 is the right chip and yes I've gone through the datasheet. the 555timer has a count from 1 to 9 and that's why it goes in a clockwise direction. i do not know how to make it start from 9 to 1. the assignment is to make a heart shaped badge. first we implement using breadboard and...

when the switch is closed, the 555timer sends a pulse to the 4017. one LED is lit at a time and then it chases around in the clockwise direction.

It's as shown belowhttp://www.kpsec.freeuk.com/docs/heart.pdf

i've already mounted the circuit on breadboard... I can not understand how to make the LEDs chase in the anti-clockwise way.. thank you for helping..

hi... am actually doing a project entitled' Heart-shaped badge'... it uses 8 LEDs and ICs: 4017 and 555 timer... the LEDs chase clockwise... and now i have to make them chase anti-clockwise and also make a two-way chasing effect...can anyone help me with these? am kinda stuck...