The Tesla Coil is a device that is used for defense, and electrifies all players and mobs that get within shocking range. The Tesla Coil must be charged with EU, and it has a maximum input of 128 EU/t. After the Tesla Coil is charged, it can be activated with a Redstone signal. The easiest setup is to activate the Tesla Coil with a pressure plate , tripwire, or any other redstone signal.
For whole base defense, this is inferior to the Industrial Tesla coil, as it zaps all living things including the player, whereas the the Industrial tesla can be configured to harm only certain things, and can extend its range and increase its speed.