1-Wire Transient Protection

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Here is a simple circuit that will attempt to protect your internal equipment from a lightning strike. The circuit consists of
4 spark gaps, 3 transient voltage suppressors, 3 gas discharge tubes, 1 metal oxide varistors, 2 100mA fast blow fuses and
2 4.7ohm resistors.


The circuit works by trying to divert the bulk of the current to the power ground, the power ground is preferably a proper
lightning ground, earth rod or something that can carry a hefty current. The circuit also uses two fast blow fuses that will
disconnect the sensitive side from the strike side when lightning hits or when theres a high enough voltage to push current
through the various protectors which subsequently blows the fuses.

The ratings of the components should be resonably close to the normal running voltage of the network, I'd probably use
12v TVS's, 50v GDT's (as used for telephone lines) and 18v MOV's.