Design an oscillator circuit using a 555 IC to produce a square waveform.

The square wave should have an equal mark-to-space ratio, a frequency equal to that of the resonant frequency of the metal bar estimated in Part 1, and an output voltage going from 0 volts to +15 volts... (Budget: £20 - £250 GBP, Jobs: Analog Electronics, Circuit Design, Electrical Engineering, Electronics, Engineering, PCB Design and Layout, Prototyping, Schematic Review, Signal Processing, Simulation)