This board provides on board components such as timing resistors (potentiometers), capacitors, and a duty cycle control diode section. All of these can be brought in or out of circuit with jumpers.

All 555 IC pins are broken out to 0.1 inch headers to allow external access to pins and also external components can be used instead of the on board defaults.

This allows a quick 555 circuit to be implemented in astable or monostable mode, while also providing a platform for interaction with other breadboarded circuits. Use the 555 as a clock source, tone generator, or other application.

KiCAD design files can be found on Github.