GUPTA LAB

There once was a student named Schwyn
Who constructed a box out of tin(*)
That had the propensity
Of locking the intensity(**)
Of an input to be plugged therein

Then one day - let me give you the scoop
Deep was worried about our Feshbach loop
He said: "I'd give my pre-molars
for some PID controllers!"
And that was how Ben joined the group

(*) actually, aluminum
(**) well, not intensity in the physical sense... Voltage, to be precise.