Electronic Rat Killer Circuit Diagram ((better)) Jun 2026

Before diving into the diagram, you must understand the underlying physics. An electronic rat killer is essentially a high-voltage generator similar to a stun gun or electric fly swatter, but scaled for larger pests.

Once the entry is confirmed, the device activates a battery-powered circuit.

Unlike a fly swatter that uses a button, a rat killer should be always active . The high impedance of the open circuit draws zero current when no rat is present. When a rat steps on both plates, its body resistance (approx 500kΩ to 1MΩ) completes the circuit, causing a massive voltage drop and current surge.

Since we need high voltage but usually operate in locations where high-voltage lines are inaccessible, the device must convert a low-voltage DC source (usually a battery) into high-voltage pulses. This process is achieved through an .