Low-cost Approach to Design ESD Protection Circuit for a Clap Switch

This paper presents the design and implementation of an Electrostatic Discharge (ESD) protection circuit for a clap switch, employing a methodology inspired by lightning protection strategies. The proposed protection mechanism is intended to shield the clap switch from potential ESD events that could compromise its performance and durability. The paper details the design considerations, methodologies, and outcomes, demonstrating the effective mitigation of ESD-related issues. The protection strategy focuses on safeguarding the components mounted on the Printed Circuit Board (PCB). A combination of a Transient Voltage Suppression (TVS) diode and a bypass capacitor provides robust ESD protection. Without these measures, the clap switch is subjected to peak voltages and currents of 7 kV and 8 A, respectively; levels far beyond its tolerance. Following the implementation of the protective circuitry, the exposure levels were significantly reduced to peak voltages of 5 V and currents of 3.6 mA, ensuring the system's safety and operational integrity.