First off EMP stands for Electro Magnetic Pulse.
Second DO NOT try to make one form an old microwave...it wont work and you WILL end up becoming blind (at best you will make a microwave emmiting
device with no shielding and it will blind you or end up cooking something)
now onto building an EMP device, I can see why the OP would want one but the practical benifits are limited.
First off an EMP would destroy ALL electronic components in the area including your car, computers etc as well as any non-shielded killer robots from
Now to make your own at home the best option is to make what is known as a "Flux Compression Generator Bomb" - this consists of a metal armature
surrounded by a coil of wire (stator winding).
The armature cylinder is filled with high explosive, and a sturdy jacket surrounds the entire device. The stator winding and the armature cylinder are
separated by empty space. The bomb also has a power source, such as a bank of capacitors, which can be connected to the stator.
Here's the sequence of events when the bomb goes off:
* A switch connects the capacitors to the stator, sending an electrical current through the wires. This generates an intense magnetic field.
* A fuse mechanism ignites the explosive material. The explosion travels as a wave through the middle of the armature cylinder.
* As the explosion makes its way through the cylinder, the cylinder comes in contact with the stator winding. This creates a short circuit,
cutting the stator off from its power supply.
* The moving short circuit compresses the magnetic field, generating an intense electromagnetic burst.
This will generate a fairly directional burst of EM but no where near as massive as one from a nuke, but it should cause the desired effect.
Again please be safe and dont construct stuff like this....its probably not worth the jail time vs safety against killer robots