need help with momentary switches and rotary switches

hi,

i going use couple of toggle switches , rotary switch (11 positions), , ask questions how use them, purpose. making keyboard device, signals should interpreted key press.

i did check tutorials how use momentary switch; toggle switch; can't use same logic, since button goes off when release pressure on it; while toggle stay on until turn off again. objective toggle switch on, , have signal being registered once only; instead of being on. when turn off toggle switch, signal processed again. want use toggle switch momentary switch.

same goes rotary switch: has 11 positions, thinking if possible use trigger button press. give idea; have rotary switch behave throttle wheel may find on boat; @ 0 (position 6 example, center of rotary switch), if turn right 1 position; press button increase speed of boat; if go 1 more on right; "increase speed" pressed; if go 1 position, speed decrease.

i thought of keeping variable increase , decrease, based on current position , previous position (so know if previous position 6 , new position 7, need press speed increase, while if position goes down, need press speed decrease). correct?

thanks in advance suggestion may have. first attempt @ using switches beyond standard momentary switch arduino.

if want toggle switches, need provide more information (manufacturer , model number, or spst/spdt/dpst/dpdt, 2 positions/three positions, spring return, center off, other features).

not sure rotary switch.

you need find , understand state change detection example.  knowing when switch has changed rather knowing switch on or off.

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