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2. Pressure switch - Wikipedia

   en.wikipedia.org/wiki/Pressure_switch

   The contacts of the pressure switch may be rated a few tenths of an ampere to around 15 amperes, with smaller ratings found on more sensitive switches. Often a pressure switch will operate a relay or other control device, but some types can directly control small electric motors or other loads.

3. Relay - Wikipedia

   en.wikipedia.org/wiki/Relay

   The National Association of Relay Manufacturers and its successor, the Relay and Switch Industry Association define 23 distinct electrical contact forms found in relays and switches. [12] Of these, the following are commonly encountered: SPST-NO (Single-Pole Single-Throw, Normally-Open) relays have a single Form A or make contact. These have ...

4. Linear actuator - Wikipedia

   en.wikipedia.org/wiki/Linear_actuator

   The power supply is from a DC or AC motor. The typical motor is a 12v DC, but other voltages are available. Actuators have a switch to reverse the polarity of the motor, which makes the actuator change its motion. The speed and force of an actuator depend on its gearbox. The amount of force depends on the actuator’s speed.

5. Automotive battery - Wikipedia

   en.wikipedia.org/wiki/Automotive_battery

   A typical 12 V, 40 Ah lead-acid car battery. An automotive battery, or car battery, is a rechargeable battery that is used to start a motor vehicle.. Its main purpose is to provide an electric current to the electric-powered starting motor, which in turn starts the chemically-powered internal combustion engine that actually propels the vehicle.

6. Automobile accessory power - Wikipedia

   en.wikipedia.org/wiki/Automobile_accessory_power

   The French company Citroën devised a high-pressure hydraulics system for cars which was used for all manner of systems, even power-adjustable seats. The 1999–2004 Jeep Grand Cherokee had a hydraulically driven radiator fan, powered by the SUV's power steering pump.

7. List of resistors - Wikipedia

   en.wikipedia.org/wiki/List_of_resistors

   A potentiometer (colloquially, pot) is a three-terminal resistor with a continuously adjustable tapping point controlled by rotation of a shaft or knob or by a linear slider. [14] The name potentiometer comes from its function as an adjustable voltage divider to provide a variable potential at the terminal connected to the tapping point. Volume ...