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  2. Daytime running lamp - Wikipedia

    en.wikipedia.org/wiki/Daytime_running_lamp

    A daytime running lamp (DRL, also daytime running light) is an automotive lighting and bicycle lighting device on the front of a road going motor vehicle or bicycle. [1] It is automatically switched on when the vehicle's handbrake has been pulled down, when the vehicle is in gear , or when the engine is started, emitting white, yellow , or ...

  3. Automotive lighting - Wikipedia

    en.wikipedia.org/wiki/Automotive_lighting

    The first car registered to drive on the road with full LED rear lights was Land Rover's LCV 2/3 concept car in the 1990s. [143] At the time, the only light function that was difficult to reproduce was the reverse light, as white LEDs did not yet exist.

  4. Dimmer - Wikipedia

    en.wikipedia.org/wiki/Dimmer

    A thyristor dimmer rack An electrical schematic for a typical SCR-based light dimmer Solid-state , or semiconductor , dimmers were introduced to solve some of these problems. Semiconductor dimmers switch on at an adjustable time (phase angle) after the start of each alternating-current half-cycle, thereby altering the voltage waveform applied ...

  5. Tell-tale (automotive) - Wikipedia

    en.wikipedia.org/wiki/Tell-tale_(automotive)

    A group of tell-tales showing lights for "brake fluid", "stop lamp" and "check engine" Graphical tell-talesA tell-tale, sometimes called an idiot light [1] or warning light, is an indicator of malfunction or operation of a system, indicated by a binary (on/off) illuminated light, symbol or text legend.

  6. Pulse-width modulation - Wikipedia

    en.wikipedia.org/wiki/Pulse-width_modulation

    Adjusting the brightness of light emitted by a light source is then merely a matter of setting at what voltage (or phase) in the AC half-cycle the dimmer begins to provide electric current to the light source (e.g. by using an electronic switch such as a triac). In this case the PWM duty cycle is the ratio of the conduction time to the duration ...

  7. Electrical ballast - Wikipedia

    en.wikipedia.org/wiki/Electrical_ballast

    A dimmable ballast is very similar to a rapid start ballast, except that the autotransformer is connected to a dimmer. A quadrac type light dimmer can be used with a dimming ballast, which maintains the heating current while allowing lamp current to be controlled. A resistor of about 10 kΩ is required to be connected in parallel with the ...

  8. Auto carrier - Wikipedia

    en.wikipedia.org/wiki/Auto_carrier

    Car carrier trailer, a trailer or semi-trailer designed to transport passenger vehicles via truck; Roll-on/roll-off, a ship designed to transport wheeled cargo, including new cars and other motor vehicles; Auto Carriers Ltd., now AC Cars, a British automobile manufacturer; SS Autocarrier, launched 1931, the first container ship

  9. Motor carrier - Wikipedia

    en.wikipedia.org/wiki/Motor_carrier

    Motor carrier may refer to: Motor carrier (designation), a company which employs large semi-truck and bus drivers; Motor Carrier, an English automobile produced in 1904;