I’m looking to create a very simple mechanical momentary switch for a project which will change tracks on an mp3 player. The switch will need to be activated somehow by a slowly rotating shaft. I thought I had the answer by using a reed switch and magnets, but the resulting on/off from the reed switch was too slow as the magnets passed by, and doesn’t trip the mp3 player… it needs to be quick momentary switch. Additionally, the player will not tolerate any current flowing through the switch. The momentary switch will need to be something that can be tripped with very little resistance. I have experimented with LED detectors, and Hall Effect sensors, but both had current flowing through them which hung up the mp3 player. Whatever design I end up using, will need to be able to be reproduced easily and inexpensively. I am a novice with electrical circuits, but have access to people to help. Would appreciate any thoughts.