The change time (output high) is given by: And the discharge time (output low) by: An input trigger such as a switch or button is pressed which connects its corresponding resistance within the ...

When a 555 timer is operating in Astable mode we obtain a pulse on the output pin whose ON time (Time high) and OFF time (Time low) can be controlled. This controlling can be done by selecting the ...

Here’s an interesting implementation of a classic: the 555 timer as astable multivibrator for the noble purpose of making weird music. [pratchel] calls this a Morgenflöte or morning flute ...