- on Home & Garden
- Published in issue 7/2004 on page 0
Two multivibrators with different frequencies can be built using the NAND gates of a 4011 IC. If the output of IC1.B is positive with respect to IC1.C, LED D1 is on. As the levels of IC1.A and IC1.D are exactly opposite, D2 is always on when D1 is off, and the other way around.The two oscillators have different frequencies, which are determined by the values of R2/C2 and R5/C5 respectively according to the formula ...