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The headlight of my motorcycle is AC powered via stator.

I want to switch between Hi/Low beam using a single pole double throw (SPDT) NC relay. Power to pin 30 (AC) Ground to pin 85 (?) Trigger to pin 86 (DC) Output 87 Lo-beam (AC) Output 87a Hi-beam (AC)

But I want to trigger that relay using a DC switch source (my handlebar controls are DC from the battery, and my headlight is AC from the stator.)

Can I trigger an AC relay with the DC current from my handlebar switch? Is it better to do this with an AC or DC relay? How do I do this simply without adding too much extra wiring to bike.

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Use a DC relay for this with enough current rating for the lamp, like those used in cars. The trigger source defines the coil, not the load.

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Standard 12 V DC automotive relays would do.

Two would be required, one to switch on the headlight and the other to select 'high' or 'low' beam.

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