This circuit is asymmetric with the mark-space relationship determined by R1 and R2. The diode can be a general-purpose type and the circuit also works with 4001. The pinout for 4011 is found in several other articles in this section and website.

This circuit is asymmetric with the mark-space relationship determined by R1 and R2. The diode can be a general-purpose type and the circuit also works with 4001. The pinout for 4011 is found in several other articles in this section and website.