Pendulums are often used to answer questions that will have a "yes" or a "no" answer. If you're new to using a pendulum, or haven't used one or heard of one before, this may be helpful.
A pendulum is a weight hung on the end of a chain. You can make your own, or buy one ready made. Traditionally, a wedding ring on a piece of string or necklace would be used to find out the sex of an unborn baby. They can be plain or elaborate, the choice is yours.
When I use a pendulum, I find that sitting in a comfortable position is very important to me. I don't want to feel "stiff" or restricted, and so I rest the elbow of the arm I'm holding the pendulum in on my leg/lap/knee (depending how I'm sitting that day!).
I hold the chain between my thumb and first finger, with them pointing downwards to enable the chain to move freely and not struggle to move in any direction.
Next, I ask questions that I know the answers to so see what movements will represent "yes" and which will represent "no." I find this can (and does) vary on different days, so I always start off with this. When the answers are reliably clear (eg, each time I ask "is my name Caroline?" (it is) it moves one way, and each time I ask "do I work in a bank?" (I don't) it moves another way, I then move on to asking questions that I don't know the answer to.
Other people say to the pendulum, "show me yes" and "show me no" and note the way the pendulum moves for each one. The key is finding the way that works for you.
For me, I find the pendulum swings left to right for one answer, and forwards and backwards for the other one, but this can vary person to person. Some people find it goes around in a circle one way for "yes" and the other way for "no." You'll need to practice and see how it moves for you.
It can take a little bit of time for the pendulum to move or change direction, so you do need to be patient and may need to sit still for a few minutes to get a clear answer. If I'm unsure, I often ask something along the lines of "is yes the correct answer" if I think the answer was showing a "no" as the pendulum should then change direction. Sometimes it won't give you a clear answer. When this happens to me, usually either the pendulum doesn't move at all or goes around in a circle. I find it better to leave this question for a while and re-visit it later.
If I'm asking several questions for myself, I tend to just ask away without stopping the pendulum or it's movement, but if I'm asking questions for other people then I stop the pendulum with my other hand before asking questions for the next person. Again, this is something you can do your own way, however you feel comfortable. The main this is to have fun getting to know how your pendulum works for you.