The first is the push-to-pass system ... It is activated when the driver presses and holds a button on the steering wheel. For St. Pete, the maximum time a driver can hold the button is 15 ...

Stepper motors play ... between 400Hz and 1200Hz. A push button triggers the homing sequence, and an onboard RGB LED provides real-time feedback, flashing red when the StallGuard threshold is crossed ...

You program the RadioScout using the buttons on the front panel and a ... is displayed with a large compass-like needle run by a stepper motor, and you you can use it to guide yourself onwards.

[pros] has come up with a very elegant way of making lighted buttons (translated). Using a bunch of small push buttons harvested from old CD players, he rigged this unique way of mounting LEDs.