Led lights and capacitors - Snowblower Forum : Snow Blower Forums
 
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post #1 of 8 Old 02-10-2018, 08:07 PM Thread Starter
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Led lights and capacitors

When adding led lights are the capacitors wired in parallel or in series after the bridge rectifier?
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post #2 of 8 Old 02-10-2018, 09:12 PM
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Parallel to the light, positive to positive negative to negative.


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post #3 of 8 Old 02-10-2018, 09:17 PM
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I believe in parallel with the lights as the capacitor acts like a temporary battery, charging up from the supply from the rectifier and filling in any holes (ripples) in the supply with its own charge. Since capacitors pass AC and block DC, if you wired it in series, you'd get no power to your LEDs.

Edit: When using an electrolytic capacitor, make sure you match the polarity with the circuit. The negative bus has both the negative side of the capacitor and the negative side of the LED touching it. And the positive bus has the positive sides of the capacitor and LED touching it.
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post #4 of 8 Old 02-11-2018, 09:05 AM Thread Starter
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Thanks. All done and running great
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post #5 of 8 Old 02-11-2018, 01:10 PM
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Quote:
Originally Posted by jrcjr View Post
I believe in parallel with the lights as the capacitor acts like a temporary battery, charging up from the supply from the rectifier and filling in any holes (ripples) in the supply with its own charge. Since capacitors pass AC and block DC, if you wired it in series, you'd get no power to your LEDs.
Sorry, that is incorrect.

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post #6 of 8 Old 02-11-2018, 02:50 PM Thread Starter
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All is working, but I still get flicker when it is not running at top speed.
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post #7 of 8 Old 02-11-2018, 03:30 PM
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Quote:
Originally Posted by Barry MacEwen View Post
All is working, but I still get flicker when it is not running at top speed.
Yeah, normal because of low rpm the stator voltage drops and the space between impulse is longer and capacitor has a chance to discharge a bit.


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post #8 of 8 Old 02-11-2018, 03:37 PM
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Quote:
Quote:Originally Posted by jrcjr View Post
I believe in parallel with the lights as the capacitor acts like a temporary battery, charging up from the supply from the rectifier and filling in any holes (ripples) in the supply with its own charge. Since capacitors pass AC and block DC, if you wired it in series, you'd get no power to your LEDs.
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Originally Posted by jonnied12 View Post
Sorry, that is incorrect.
What part do you think isn't correct? A capacitor will let AC through in series but block DC like he said. Unless I've been wrong the last 45 years working as an electronics engineer.


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