Once the switch is activated (and the key switch turned "on"), the software is designed so the start up signal goes through a timing circuit. The timing circuit is where the Gramma principle of an indirect action comes into play, thus the user is not activating the motor circuit directly. Once the timing circuit is complete the Shabbat module will close the motor circuit and the system is programmed so the Amigo "crawls" at a very slow speed without the user touching the throttle lever, we refer to this as "crawl speed". During crawl speed the goal is to be able to stall the Amigo by turning the tiller all the way to the right or left. If the user feels that they are in physical danger at anytime they can depress an emergency brake switch and the Amigo will come to an immediate stop.
Once the Amigo is in the crawl mode, if the user wants to go faster they pull on the throttle lever and the Amigo picks up speed just like normal. I'm told that this action is approved because the user is not opening or closing a motor circuit, they are just modifying the amount of current going through it.
However, the user is not allowed to change direction by pushing the throttle lever in the opposite direction as this would require the motor circuit to switch. Instead the user has to depress the Directional Switch. When this switch is depressed the timing circuit is activated and after a couple seconds the Shabbat module sends a signal and switches the motor circuit so the Amigo runs in the opposite direction.
The Amigo can be turned off when the user reaches their destination because it will again go through the timing circuit when the key switch is turned to the "off" position. The Amigo cannot have its batteries charged during the Shabbat period as this requires a direct action of having to connect the battery charger to the wall outlet. Depending on the Amigo model the Amigo can go 15-30 miles on one charge so they should have enough power for the entire Shabbat period. When the Shabbat period ends the use can switch the Amigo back to Normal mode.