| Electronics > Beginners |
| Driving a 12V relay with 18V |
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| Dave_C:
The wasted power that james_s talked about is the power dissipated by the resistor ( 0,182W according to your calculations ) It depends on your requierments if that's acceptable or not. If you powered the relay from a battery that would matter a lot, otherwise it's not really too much of a problem. |
| Adhith:
--- Quote from: Dave_C on August 22, 2018, 12:21:48 pm ---The wasted power that james_s talked about is the power dissipated by the resistor ( 0,182W according to your calculations ) It depends on your requierments if that's acceptable or not. If you powered the relay from a battery that would matter a lot, otherwise it's not really too much of a problem. --- End quote --- the relay is use to charge a battery pack and its charged with a wall adapter. so I guess it wont matter that much |
| Raj:
Just use an src instead of relay |
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