Adafruit
75mm Bars - 12V Digital RGB LED Pixels (Strand of 21) [WS2801]
Digitally-controllable RGB LED pixel bars using WS2801 driver chips. Each 75mm plastic PVC bar contains 3× 5050 RGB LEDs and a controller chip, epoxy-flooded...
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Digitally-controllable RGB LED pixel bars using WS2801 driver chips. Each 75mm plastic PVC bar contains 3× 5050 RGB LEDs and a controller chip, epoxy-flooded for waterproof outdoor use. Sold as a strand of 21 pixels — ideal for building large RGB 7-segment displays.
The pixels connect via a 4-conductor cable (+12V DC, ground, data, and clock). Data shifts from one pixel to the next, so strands can be cut or extended as needed. Each pixel is individually addressable with 24-bit colour (8-bit PWM per channel). Multiple strands can be daisy-chained using the JST SM 3-pin connectors.
Key Features
- 21 Pixels Per Strand – 75mm bar format with 3× 5050 RGB LEDs each
- WS2801 Controller – 24-bit colour, individually addressable
- Waterproof – Epoxy-flooded PVC enclosure
- 12V DC – Constant-current driven for even colour throughout
- Chainable – JST SM connectors for extending strands
- Mounting Options – Flanges with 4mm holes and adhesive foam tape
- 120° Beam Width – ~4000mcd total brightness per pixel
Specifications
- LEDs Per Pixel – 3× 5050 RGB (controlled as one unit)
- Pixel Size – 75mm bar
- Voltage – 12V DC
- Interface – 2-wire (data + clock), any two digital pins
- Connectors – JST SM 3-pin (data), separate power wires
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- RGB
- Short for red, green and blue, the three primary colours of light that are mixed in varying amounts to make a wide range of colours. In electronics RGB can refer to an LED or pixel that blends these three colours, or to a colour signal or interface that carries separate red, green and blue channels.
- Terminal block
- A terminal block is a connector that joins wires together in a neat, removable, or serviceable way, usually clamping each wire under a screw or spring instead of soldering. It makes it easier to connect, change, or service wiring without permanent joints.
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