A basic pendulum is made up of two essential parts - a weight-stone and a chain - or in the example above, a weight-stone and a string. There is an optional third part as well, a fob, also known as the "holding piece". The fob is not essential to the operation of the pendulum, but having one improves the pendulum's handling a great deal.
Pendulums have an amazing range of uses and have been employed by many different cultures for thousands of years. The oldest known recorded pendulum use is eight thousand years old, recorded in ancient cave drawings in Algeria. Chinese emperors used pendulums to predict the future. Moses used one to discover water hidden in a rock. Pendulums have fallen in and out of favor over the years, and at times were outlawed and feared. There are a lot of misconceptions about pendulums even today – fears that make some people leery of their strange “power”, and others entranced by it. There is nothing to fear here. It is human energy, working in concert with the natural world around you that makes the pendulum swing in a meaningful way.
Ideally, you want your pendulum to get it's answers from your "higher self" - aka your intuition. Each time you use your pendulum you need to cite the source of the pendulum's answers to ensure that you're getting info that comes from your intuition.
To explain how it works, let's use an old fashioned radio as an analogy: Your body is the radio antenna, your intuition is the radio receiver - and signal descrambler. The pendulum is the radio speaker. Your body, the antenna, with its many senses, is constantly picking up data (seen and unseen) from the world around you. This information is unconsciously conveyed to, stored in, and processed by your intuition. When you "ask your pendulum" a question, your intuition looks at the vast array of data it has at its disposal and transmits the answer to the question by way of a signal, using your body’s nervous system. The signal runs down your arm, through your wrist and out through the pendulum. The pendulum, your radio’s "speaker", announces the answer to your question using a signal which you "listen to" with your eyes - observing the direction and intensity of the pendulum's swing. Continuing with the analogy, we consider a weak pendulum swing to be a "quiet" response and a big swing, a "loud" one. In fact, when you're using your pendulum, you can tell it to "Answer louder" if it's not swinging big enough to discern the signal.