The 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse generation, and oscillator applications.

Its I O mode is flexible and programmable, and it has a single phase clock with an on chip oscillator.

The light then passes four times through a circuit containing a neodymium glass amplifier similar to (but much smaller than) the ones used in the main beamlines, boosting the nanojoules of light created in the Master Oscillator to about 6 joules.

Each oscillator can produce sine waves which may also be modified into 3 other waveforms the negative part of the sine can be muted or inverted, and pseudo sawtooth waves (1 4 sine waves upward only with silent sections in between) can also be produced.