Servo is just a regular non-modified miniservo, rotates 200degrees. 10:1-gearing makes the needle axle rotate 2000degrees (about 5.5 rounds).
Most of the gauges do not need that many rounds (variometer, tachometer, air speed etc.) and some of them do need infinite rotation of the needle (altimeter etc) so I still need to either modify servo for continuous rotation or perhaps I could use small stepper motors (that was the plan earlier in this project).
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