4 layers90 × 90 mm
Power distribution
menloresearch/asimov-1
v1 of Asimov, an open-source humanoid robot
25 parts1.4kCERN-OHL-S-2.0
4 layers33 × 13.6 mm
LEDBoard 4x4 HD
s-light/LEDBoard_4x4_HD1PCBs for magic amulet
- Size
- 33 × 13.6 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 57
- Pads
- 333
- Tracks, vias
- 874, 120
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 15 Oct 2018
- Updated
- 20 Apr 2022
Overview
LEDBoard 4x4 HD is an open-source printed circuit board by s-light, from the s-light/LEDBoard_4x4_HD repository on GitHub, published under the MIT licence. It is a 4-layer board of 33 × 13.6 mm with 25 parts on 57 nets, routed with 874 tracks and 120 vias.
It is built around the TLC5957RTQ. Its parts include 4 capacitors, 3 connectors, 1 resistor and 1 IC.
Main components
1README
README.mdLEDBoard_4x4_HD
PCB originally designed for magic_amulet,
but now used in magic_crystal
Overall Size:
33mm x 14mm
PCB
4layer board - uses 150mil traces and 100mil trace spacing
shown pcb came from aisler
parts
LED-Driver: TLC5957 (48ch CC 9-16Bit-PWM driver)
more information in AppNote Build a High-Density, High-Refresh Rate, Multiplexing Panel With the TLC5957
LED: Rohm MSL0402RGBU (1.8x1.6x0.5mm RGB)
BOM
can be ordered with aisler parts-package
or also with this list at mouser
or with plain part numbers:
Qty. Mfr. No Manufacturer Description
16 MSL0402RGBU1 ROHM Semiconductor Standard LEDs - SMD RGB 624/527/470nm 5V 400/550/180mcd 30mA
1 TLC5957RTQR Texas Instruments LED Lighting Drivers 48-channel, 16bit ES PWM LED driver
2 GRM188R61A226ME15D Murata Multilayer Ceramic Capacitors MLCC - SMD/SMT 0603 22uF 10volts *Derate Voltage/Temp
2 GCM188R91E104KA37D Murata Multilayer Ceramic Capacitors MLCC - SMD/SMT 0603 0.1uF 25volts X8R 10%
1 ERJ-PB3B7501V Panasonic Thick Film Resistors - SMD 0603 Anti-Surge Res. 0.1%, 7.5Kohmpower & cooling
if you want to drive the leds with full power (up to 25mA/color)
you definitely need a heatsink.
the pcb backside get to >= 60°C very fast without a heatsink!
also remember that one board needs up to 1.2A@5V = 6W
constant current
RIREF(kΩ) = VIREF(V) / IOLCMax(mA)× Gain | / Gain
RIREF(kΩ) / Gain = VIREF(V) / IOLCMax(mA) | swap
Gain / RIREF(kΩ) = IOLCMax(mA) / VIREF(V) | x VIREF(V)
Gain / RIREF(kΩ) x VIREF(V) = IOLCMax(mA)
Gain / 7.4kΩ x 1.2V = IOLCMax(mA)| Gain | BC | IOLCMax |
|---|---|---|
| 20.0 | 0x0 | 3.2mA |
| 39.5 | 0x1 | 6.4mA |
| 58.6 | 0x2 | 9.5mA |
| 80.9 | 0x3 | 13.1mA |
| 100.0 | 0x4 | 16.2mA |
| 113.3 | 0x5 | 18.4mA |
| 141.6 | 0x6 | 23.0mA |
| 154.5 | 0x7 | 25.0mA |
Software
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | LED_RGB | LEDs_SMD_NICHIA:LED_RGB_0706_1816Metric_ROHM_ThermalVias | D_0x0, D_0x1, D_0x2, D_0x3, D_1x0, D_1x1, D_1x2, D_1x3, D_2x0, D_2x1, D_2x2, D_2x3, D_3x0, D_3x1, D_3x2, D_3x3 |
| 2 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C2, C3 |
| 2 | 47uF 6.3V | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C1, C4 |
| 2 | power | PCB_SolderMount:Conn_01x02_SMD_90deg_SolderMount | J1, J3 |
| 1 | 7.5KOhm 0.1% | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R1 |
| 1 | TLC5957 | Package_DFN_QFN:QFN-56-1EP_8x8mm_P0.5mm_EP5.6x5.6mm_ThermalVias | U1 |
| 1 | data | PCB_SolderMount:Conn_01x05_SMD_90deg_SolderMount | J2 |
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Questions
How big is the LEDBoard 4x4 HD PCB?
It measures 33 × 13.6 mm and has 4 copper layers, 1.6 mm thick.
What parts does the LEDBoard 4x4 HD use?
25 parts, built around the TLC5957RTQ. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the LEDBoard 4x4 HD KiCad files?
From the s-light/LEDBoard_4x4_HD repository on GitHub, at the commit this page was made from: the board is LEDBoard_4x4_HD.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the LEDBoard 4x4 HD design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).