LED on/off sequence using a 556 astable timer IC

I need the schematic diagram (or a written description) using a 556 dual timer(or two 555 timers) to make one LED flash on/off as follows: "ON" for about 1 second; "OFF" for about 1/2 second; "ON" for about 2 seconds and "OFF" for about 4 seconds. This sequence needs to continuously repeat using a 9 volt battery power supply.

Posted by cwelshman (cwelshman3@hotmail.com) on 07/05/2005, at 19:03 GMT