Schematic Feedback

[wastedthelight]

I was hoping for some feedback on this design.

Purpose: Allow two strips of addressable LEDS to be plugged in via 3 pin Molex and run two light shows simultaneously. Powered via 5v 2a power wall wart using barrel connector.

Mocked up in Photoshop, couldn't figure out out the schematic programs, ha.

Thanks for any feedback provided!

[J-M-L]

I assume you want to design this for the usual WS2812 led strips.

Adafruit has published is a good guide here

Their recommended wiring is like this

so take into account the capacitors note:

On larger projects, you may need to add a capacitor (100 to 1000 µF, 6.3V or higher) across the + and – terminals for more reliable operation

• the size of the power tracks would need to be sufficient to accommodate high current

Note that some strips use a different pin order as stated on their document, which means your molex wiring has to match only one type of strips.

[wastedthelight]

Thanks for the info and link!
Yes, WS2812 strips of less than 30 LEDs on each, so around 60 LEDs total across two strips is all for this specific use case. Also good note that the order of the wires from the strips can change. I can reorder them from the strip side easily at the female molex, so it shouldn't be a problem, just have to be mindful of it.

I'll adjust the PSU cap to 1000. The capacitor at each strip may be unnecessary it seems?

[J-M-L]

@wastedthelight

The capacitor at each strip may be unnecessary it seems

I'm not a hardware expert but they likely can't hurt

As you power through the 5V pin, you bypass the regulator and should really make sure that the incoming voltage is a super stable 5V. You could also consider a diode to block reverse current in case of
inverse polarity from the jack (preventing damage by either stopping current flow (series) or shorting with a fuse (parallel)).