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* '''Electromagnetic Relay'''
 
* '''Electromagnetic Relay'''
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Relay choice depends on vehicle's electrical system voltage. If this setup is installed into a Vehicle with 12 V system, then a relay similar to the [https://www.digikey.com/en/products/detail/panasonic-electric-works/CB1-12V/646971 CB1-12V] could be used. Otherwise, if the electrical system is 24 V, a relay similar to the [https://www.digikey.com/en/products/detail/panasonic-electric-works/CB1-24V/646972 CB1-24V] could be used. When choosing a relay, the most important aspect is '''Coil Voltage''', therefore I recommend using aforementioned relays based on the voltage.
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Relay choice depends on vehicle's electrical system voltage. If this setup is installed into a Vehicle with 12 V system, then a relay with '''12 V Coil Voltage''' should be used. Otherwise, if the electrical system is 24 V, a relay with '''24 V Coil Voltage''' should be used.  
    
When building this schematic, you can ground the device and the relay on the same spot, for example, chassis of the vehicle.
 
When building this schematic, you can ground the device and the relay on the same spot, for example, chassis of the vehicle.