Hi all, I've got hold of an old remote control and I'm trying to identify a part. Its a mitsubishi RM M54-42402, you can see a picture here: http://www.antzrhere.co.uk/mitsubishi.htm (2nd picture), the part I am interested in is the jog wheel. All its got on the part is alps 120H JAPAN, its got 2 groups of pins on it, a set of 3 and a set of 5.
on the circuit board the pins are marked left to right, 1,2,3,C1,4 and J2,C2,C1.
Hooking up a dmm I have determined that the set of 5 pins are for the outside part of the jog wheel and seem to provide 2 switches? for each side of centre that you move it, depending on how far left or right you move it will give a reading on one of the pair of pins with the other probe connected to C1 (which I think is common?).
the set of 3 pins I don't really understand, using the same technique (- probe on C2) I am reading resistance when I wind the jog wheel round but It doesn't make sense to me, I think its a quadrature encoder but I don't have a clue how to hook it up to the arduino, both issues here being down to my lack of understanding/experience of electronics I guess. Do I need some kind of resistor in line for each of the inputs?
Can anyone help me with understanding this part or point me to some info where I can try and find out about how to use it? Google wasn't very freindly I'm afraid.....
It's a really robust solid feeling part and is ideal for some projects I have in mind, best of all it cost me £1 :)