K32¶
32 fused pixel ports, 4 differential ports and DMX.
K32, shown without a PocketBeagle 2. Photos may show an earlier board revision.
This page describes revision v4.1.0 (printed on the board as K32 v4.1.0).
Specifications¶
| K32 | |
|---|---|
| Local pixel ports | 32 (P1–P32), 3-pin 3.5 mm pluggable, plugs included |
| Port protection | 5 A mini-blade fuse per port |
| Power switching | — |
| Current monitoring | — |
| Differential ports | 4 × RJ45 = 16 strings (33–48), send-only |
| Total strings | 48 |
| Power inputs | 8 terminals rated 30 A, 5–24 V DC, one bank of 4 ports each |
| DMX / serial | 1 (DMX), RS-485 transmit |
| Audio | none (use a USB sound card) |
| Ethernet | 1 × Gigabit (USB-attached) |
| USB-A | 1 (via the included extension cable) |
| Display & buttons | 128×64 OLED, Up / Down / Enter / Back / Test |
| Real-time clock | yes, CR1220 backup cell |
| Fan header | — |
| Expansion header | — |
| Size | 168.6 × 202.8 mm (6.64 × 7.98 in), 11 mounting holes, 3.0 mm |
| Requires | PocketBeagle 2 (not PocketBeagle 1), FPP 9.0 or later |
Board map¶
Power terminals¶
The four terminals down the left edge feed the left half of the board, and the four down the right edge feed the right half. FPP's VIN numbers don't follow reading order:
| Terminal | Position | Feeds | FPP reading | Also powers the controller? |
|---|---|---|---|---|
| V1 | left, row 1 (top) | P1–P4 | VIN1 | yes |
| V2 | left, row 2 | P5–P8 | VIN2 | no |
| V5 | left, row 3 | P9–P12 | VIN5 | no |
| V6 | left, row 4 | P13–P16 | VIN6 | no |
| V3 | right, row 1 (top) | P17–P20 | VIN3 | no |
| V4 | right, row 2 | P21–P24 | VIN4 | no |
| V7 | right, row 3 | P25–P28 | VIN7 | no |
| V8 | right, row 4 | P29–P32 | VIN8 | no |
The blue LED beside V1 lights when it has power. V1 must be powered for the controller to boot.
See Power for supply sizing, wire size and safety.
Pixel ports¶
The 32 pixel ports are in four rows of eight, four ports on each side:
| Left half | Right half | |
|---|---|---|
| Row 1 | P1–P4 | P17–P20 |
| Row 2 | P5–P8 | P21–P24 |
| Row 3 | P9–P12 | P25–P28 |
| Row 4 | P13–P16 | P29–P32 |
Each port is G D V (ground, data, +V), as printed beside it. See Pixel outputs.
Fuses¶
Every local port has a 5 A mini-blade fuse next to it. If a port's green LED is dark while the rest of its bank is lit, check that port's fuse first. Never fit a fuse larger than 5 A. See Power → Fuses.
Differential ports¶
33-36 · 37-40 · 41-44 · 45-48
Each jack carries four strings, numbered as printed above it. They are send-only. Any standard receiver works, but receivers cannot report back. See Differential ports.
Other connectors¶
| Connector | Marking | Details |
|---|---|---|
| Ethernet | (RJ45 with LEDs) | Network |
| DMX | DMX |
DMX / serial |
| USB-A | — | 1 port (use the included USB extension cable), USB |
| OLED | GND 3.3V SCL SDA |
Controls & display |
| RTC battery | coin-cell holder | Clock |
FPP setup¶
When FPP detects the K32 it sets itself up automatically. It enables the K32 pixel-string layout, the sensors (input voltages, temperature) and a disabled DMX output. Out of the box each local port is set to 50 WS2811 pixels at 50 % brightness. Set the real counts and start channels from xLights or the FPP Pixel Strings page. See Configuring outputs.
Dimensions & mounting¶
- 168.55 × 202.75 mm (6.64 × 7.98 in), 11 plated mounting holes, 3.0 mm, for M2.5 (or #4) screws and standoffs.
- The mounting holes are connected to ground.
- Use nylon or metal standoffs at least 6 mm (¼ in) tall, so nothing on the underside touches the enclosure.
- Mounting drawing: PDF · SVG. It is shared by the K32, K32-Pro and K32-Max, which have the same outline and holes.
- A 3D-printable mount is on Thingiverse.
