Here are the NeoPixel / WS2812B light connectors that I've used. I hope this helps you find what you need for your next project!
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BTF-LIGHTING LED Strip Solderless DIY Connector Adapter
- Connects strips together, or makes it easy to "bend" or put breaks in the strips.
- No soldering required
- Can have a slightly loose connection, so look for tension in the pins.
HWELL LED Strip Lights Connectors 3pin - 10mm Solderless
- Easy to connect to strips
- Bare wires on one end make it easy to clip alligator clips, solder, or connect to your microcontroller in other ways
BTF-LIGHTING JST SM 3 Pin Connectors for WS2812B
- Marries with the connector typically found on NeoPixel or WS2812B strips
- A bit hard to connect/disconnect, so not great for projects that require constant connection/disconnection
ALITOVE Core Male Female Plug LED Connector Waterproof IP65
- Pre-tinned wires
- Stable connection
- Use for outdoor Bike Lights
Striveday 20 AWG 3 conductor wire (Red & Black & yellow)
- Thick cable with strong exterior coating.
- A little bit hard to bend, so not for close or tight connections
- There is some powder inside the cable, Use a cloth to wipe off the powder when stripping the wires.
3 Pin PCB Mount Screw Terminal Block Connector
- These terminal blocks make it easy to connect the LED strip connectors above to a breadboard.
- Use a small screwdriver to trap the wires inside.
3D printable neopixel strip corners:
Check it out here on Thingiverse.