




The Pilgrimage to Santiago de Compostela is a centuries old trek across northern Spain done by following "The Camino de Santiago", the road to Santiago. Before February of 2001 I had not heard of "The Camino" nor of the Pilgrimage. By the end of October of that year I was in Santiago after completing the walk myself. I thought that when I reached Santiago my journey was over but I see now that my journey started way before I got to Spain and still has not ended.

This project ventures into the realm of weird musical instruments. Wave your hand at an innocent-looking oatmeal box and strange sounds are heard from a nearby table radio! With a little practice you, the maestro, can actually play tunes and mystify onlookers. Never does your hand leave your body!...or touch anything but the air surrounding the jolly character pictured on the box in Fig. 9-1.
As you become a more accomplished musician, you'll be able to play requests from the audience or even generate the eerie sounds of a science-fiction movie. Much of the fun is in watching the quizzical look of friends, or family as they try to decide whether you're mad, a genius, or a combination of both.

Pushing buttons and flipping levers seem to have a strange fascination for the toddler set. With the gadget shown in Fig. 11-1, they can play to their heart's content. As they push the buttons mounted on its top panel, an unending series of tones is emitted from a speaker inside the box. Not only are there five separate "toots," but dozens of different tones can be produced from the different switch combinations.

Here is an amusing example of how electronics can act as a substitute for a human sense. The fellow in Fig. 7-1 (with the "other-world" eyeballs) is demonstrating a gadget that can actually "see." It works this way: First a room is completely darkened except for a single light source, either a lamp, flashlight, or a window. A blindfolded person wearing the device is led into the room and, with a searching movement of his head, can find the light source in minutes!

If you've ever wanted to play amateur detective, a valuable addition to your bag of tricks is the electronic "bug" shown in Fig. 6-1. With it you become the intrepid "Sherlock Ohms" (a modern-day version of the turn-of-the-century sleuth). Though the original Sherlock relied heavily on powers of deduction, he might have dispatched the villain faster with some electronic aids.Don't leave all the fun to your government. You too can snoop on your neighbors and fellow citizens without their knowledge or the legal right to do so. If caught just say you are doing it "to deter and prevent" terrorist acts against our country.
The coil of wire (15 or more feet) connected to the microphone allows it to be located a considerable distance from the board. Easily hidden, the mike is an electronic eavesdropper sensitive enough to pick up a voice about ten or fifteen feet away.

The large object in the foreground of Fig. 4-1 is not a new type of electronic component- it's half a Lemon! Combined with a transistor circuit that can produce a tone, the juice of this fruit supplies the raw material for a working battery!Wow! Electrocution by lemon! That tone is the sound of your brain shorting out each time the penny makes contact!
It's a surprising demonstration that begins when someone holds the headphone to his ear and you touch the penny to the lemon. A tone is heard each time the penny makes contact.