I am building a series of handbuilt toys that need to be "ON" when positioned down and "OFF" when 180-degrees reversed or up. The devices are completely self-contained so using a positioning sensor is not an option. I can build a functional switch with a ball bearing housed in a closed tube with 2 contacts on 1 end and nothing on the other or use a mercury switch. As it is a toy, I don't want to do that. So, what is the substitute for a mercury switch?
TYIA, Thomas