Kanga 'Smoke Stopper' a Reverse Polarity Protection module

NOTE. This is a SMD Proejct Kit   INSTRUCTIONS

This is a low cost item that can stop your precious QRP or Homebrew rig from letting all the smoke out that manufacturers carefully pack into the chips of your radio !

The ‘Smoke Stopper’ is a Reverse Polarity Protection module that is small enough to be fitted in just about any of your projects, not just radios! (25x15mm PCB)

We are using a power MOSFET that constantly keeps an eye on the input polarity, if it’s reversed the output instantly turns off protecting the rig.

Unlike the diode methods it will not pop any fuse and also it doesn’t introduce any significant volt drop between its input and output (typically less than 0.05v with a few Amps current)

The Module is a SMD project that can be tackled by SMD beginners with a minimum of equipment, I use a standard 70 watt Weller iron with its standard tip and a set of ‘helping hands magnifiers’