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Author Topic: Overkill with four diodes?  (Read 835 times)

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Offline ElectricPowerTopic starter

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Overkill with four diodes?
« on: December 11, 2022, 10:11:55 pm »
I have made an circuit (WLED Controller). This is an amateur version of the DIG-Uno.

The circuit works fine. I have ordered the board and attached LEDS and microcontroller, so no problem with the board.

But i just wonder if it is overkill with use of four diodes?

I have four SS24 SMD diodes on the board. Can i just use two?

Her is my working schematic:

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Offline Alex Eisenhut

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Re: Overkill with four diodes?
« Reply #1 on: December 12, 2022, 01:57:21 am »
I'm not sure what those diodes are supposed to do?
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Offline inse

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Re: Overkill with four diodes?
« Reply #2 on: December 12, 2022, 11:58:38 am »
They can provide protection against reversed power supply, but only the ones after the fuse make sense.
Also the fuse should be directly at the input.
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Offline Alex Eisenhut

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Re: Overkill with four diodes?
« Reply #3 on: December 12, 2022, 12:04:56 pm »
It's a lot of parts to provide a not so great function. What's wrong with the typical P-MOSFET reverse polarity protection? Or a resettable fuse? Or a three-pin connector that can plug either way?
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Offline ElectricPowerTopic starter

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Re: Overkill with four diodes?
« Reply #4 on: December 17, 2022, 01:02:00 am »
Thanks for reply :)

Please read about Dig-Uno. My circuit is an amateur version of that. See here:
https://quinled.info/pre-assembled-quinled-dig-uno/
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