This is a strand of 25 LEDs connected. Each LED is connected to one WS2801 driver chip and they are addressable. Addressable LEDs means they can be controlled individually. They are the most customizable and the most awesome LEDs. You can assign different colour for each LED as opposed to non-addressable LEDs where you can only set 1 colour at a time for the whole strand. The LEDs and the chips are enclosed in a silicone tube. They are rugged and water resistant (but not immersible).
The LEDs are connected by 4 wires. The connections are marked on the PCB. You can see it if you watch closely through the silicone tube:
Blue (GND - Ground)
Green (CO - Clock)
White (DO - Data)
Red (+5V)
The strand has 3-pin male SM connector on one end and 3-pin female SM connector on the other end. The voltage (red wire) and ground (blue wire) are separated so that you can connect voltage source easily. You may cut or connect as many LEDs as you like, just take care that your power supply can provide enough current!
You can control the LEDs with a microcontroller/microprocessor such as Raspberry Pi, BeagleBone Black or Arduino by connecting the data and clock signal to it. They are capable of displaying 24-bit true colour. That's 16 million colour variations!
These LEDs are meant to be driven by a 5V system. Do not connect other voltages to the LEDs. We found that a DC connector to screw terminal block adapter is handy when making connection from the LED to the power supply.
We have a 5V 2A power supply which is capable to drive 25-50 LEDs, perhaps more depending on your usage. If you plan to connect more LEDs, we have a bigger 5V 10A industrial power supply which can power more than 160 LEDs.
Technical details:
LED quantity: 25 LEDs per strand
LED sizes: 12mm diameter, 38mm deep
Each LED is seperated about 80mm apart
Driver chip: WS2801 (capable of 16 million colour variations)
