I am looking for the schematics to build a retriggerable one shot
circuit. The circuit must use a 555 Timer. The design equations for
the circuit would also be helpful, especially for determining the
pulse width. There are plenty of nonretriggerable diagrams available,
however I must have a retriggerable version. By this I mean that if
two input pulse's are given that are within the pulse width time, than
the output will start at the first pulse and extend longer due to the
second pulse.