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The product is a colored LED module with 64 RGB LEDs arranged in a matrix 8x8 (8 rows by 8 columns). It has built in the LED driver IC, HT16D33B, to drive each LED individually. Its operation differs from the LED strip modules in which LEDs are connected in a serial type.
To create captivating lighting effects, besides designing diverse lighting modes in programming, the functionality of the LED driver IC also plays a crucial role. The HT16D33B is a powerful driver IC that provides a 16-level constant current drive and 256-level brightness control (using PWM signal).
The brightness of the LED is determined by the driving current and the brightness control levels (duty cycle of the PWM signal). The red, green, and blue primary colors of RGB LEDs are all configurable from 0 to 255, which can create a full-color display (256 x 256 x 256) in 16.77 million colors.
The external development board can communicate with the HT16D33B via I2C interface and issue commands to control color and brightness of each LED for creating a kaleidoscopic lighting effect. LEDs on the product are uniquely numbered from LED1 to LED64. You can set or clear the colors of all, a column, a row, or individual LEDs through commands. It's also possible to configure the brightness of the LEDs.
Moreover, by cascading up to four modules, it can achieve a full-color display containing a total of 256 RGB LEDs.
| Pin | Name | Function |
|---|---|---|
| 1 | GND | Ground (LED) |
| 2 | LED_VDD | LED power supply: 4.5V~5.5V |
| 3 | SYNC | — |
| 4 | SCL | I2C clock line |
| 5 | SDA | I2C data line |
| 6 | VDD | Module power supply: 2.7V~5.5V |
| 7 | VSS | Ground |
| 8 | SYNC | — |
| 4 | SCL | I2C clock line |
| 5 | SDA | I2C data line |
| 6 | VDD | Module power supply: 2.7V~5.5V |
| 7 | VSS | Ground |
| 13 | GND | Ground (LED) |
| 14 | LED_VDD | LED power supply: 4.5V~5.5V |
Compared to the BMD26M088, which we have launched on our website, the product is designed with the same LED driver IC, HT16D33B, and also features an 8x8 matrix arrangement of LEDs.
However, the LEDs on the BMD26M088 are smaller than those on this product. Users can choose the product that best suits their application.
| Part number | BM32D2021-1 | BMD26M088 |
|---|---|---|
| LED amount | 64 (8 x 8) | 64 (8 x 8) |
| Operating voltage | 2.7V~5.5V | 2.7V~5.5V |
| LED driver IC | HT16D33B | HT16D33B |
| LED operating voltage | 4.5V~5.5V | 4.5V~5.5V |
| Max. driving current | 550mA @5V | 268mA @5V |
| Color | 16.77 million | 16.77 million |
| Brightness | 256 levels | 256 levels |
| Constant current | 16 levels (3mA～48mA) | 16 levels (3mA～48mA) |
| Cascade function | O
can cascade up to 4 modules |
O
can cascade up to 4 modules |
| Interface | I2C | I2C |
| Product dimension | 79 x 73 x 8 mm | 54 x 36 x 8 mm |
| HS Code (reference) | 8541.41.00.90-2 |
|---|
