Such things on the internet are meant for entertainment purposes, not serious use. I would not suggest using a ouji board, they are dangerous. You are inviting a spirit you know nothing about to move something physically using you as a catalyst and then the board becomes a gateway.
I would suggest using a pendulum instead. You are in complete control and you do not let yourself be led as you would with a ouji board. You can cleanse and protect the pendulum, compel truth, use it in its own circle if desired, and after use, cleanse it and disconnect it from anything that made contact through it, severing the link. It is a far better option.
The best thing about a pendulum is it can be made with ordinary things you have around the house. Even a necklace with a heavy pendant.