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Good morning knowledge base.
I have a project involving auto electrical (so 12V DC, or 13.8V on a good day) and LED lighting. I have a pair LED lights (total 60W) that I would like to be dimmable via a switch. The lights will therefore be fed by two circuits (one with a fixed resistor for the dimming) and each circuit will also require a diode to avoid back feed. The circuits will be activated by a changeover switch (SPDT) to allow selecting between circuits (dimmed or full).
So my questions:
1. What size resistor would I need to put in one of the feeds to dim the lights (say 50%)? I assume Id need to consider both ohms as well as capacity (in watts).
2. What size diode would I need in each circuit to stop the back feed?
Thanks in anticipation for your assistance.
I have a project involving auto electrical (so 12V DC, or 13.8V on a good day) and LED lighting. I have a pair LED lights (total 60W) that I would like to be dimmable via a switch. The lights will therefore be fed by two circuits (one with a fixed resistor for the dimming) and each circuit will also require a diode to avoid back feed. The circuits will be activated by a changeover switch (SPDT) to allow selecting between circuits (dimmed or full).
So my questions:
1. What size resistor would I need to put in one of the feeds to dim the lights (say 50%)? I assume Id need to consider both ohms as well as capacity (in watts).
2. What size diode would I need in each circuit to stop the back feed?
Thanks in anticipation for your assistance.