4 layers35.6 × 39.4 mm
2 layers70 × 43 mm
5x7 Controller
rixth/5x7_ControllerA controller for four 5x7 LED matrices
- Size
- 70 × 43 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 31
- Nets
- 64
- Pads
- 230
- Tracks, vias
- 680, 79
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 9 Jul 2015
- Updated
- 6 Aug 2015
Overview
5x7 Controller is an open-source printed circuit board by rixth, from the rixth/5x7_Controller repository on GitHub. It is a 2-layer board of 70 × 43 mm with 31 parts on 64 nets, routed with 680 tracks and 79 vias.
It is built around the MKL02Z32VFM4, 74HC540D and TLC59284DBQ, with the IRLML5203 and VAOM-C07573G9-BW/32 among its other parts. Its parts include 7 transistors, 7 connectors, 5 ICs, 3 resistors and 2 capacitors. It belongs with the NXP (LPC, Kinetis, i.MX RT) boards of this library.
Main components
5
MKL02Z32VFM4
QFN-32-EP(5x5)-40℃~+105℃ 1.71V~3.6V 12bit 28 32 Bit 32KB 48MHz 4KB ARM Cortex-M0+ Built-in FLASH QFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHSNXP SemiconductorsMicrocontrollers (MCU/MPU/SOC)
74HC540D
SOIC-20-300mil-40℃~+125℃ 1 11ns@4.5V,50pF 160uA 2V~6V 7.8mA 7.8mA 74HC 8 Tri-State Unidirectional SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
TLC59284DBQ
SSOP-24-150mil-40℃~+85℃ 10V 16 35MHz 3V~5.5V 4% 45mA Buck Built-in SSOP-24-150mil LED Drivers ROHSTexas InstrumentsLED Drivers
IRLML5203
SOT-231 P-Channel 1.25W 165mΩ@4.5V 2.5V 30V 3A 43pF 510pF 71pF 9.5nC@0V P-Channel ±20V SOT-23 MOSFETs ROHSKUUMOSFETsVAOM-C07573G9-BW/32
-LED Dot Matrix And ClusterVCC
README
README.md5x7 Controller
This is a project that provides hardware & firmware for a small (43x70mm) board that contains four 5x7 row-anode LED matrices.
Controller primary components
- 4 5x7 row-anode LED matrices
- 2 Texas Instruments TLC59284 sixteen-channel LED driver (constant-current sink)
- 1 CD4022B 8-output counter
- 1 74HC540 inverting buffer
- 7 IRLML5203 P-channel mosfets
- Freescale Kinetis MKL02Z32VFM4 Cortex M0+ MCU (32k flash)
- So. Many. Interfaces.
Brief design overview
This display is drawn row-by-row. The row to be drawn is selected by the counter, which feeds it output through an inverting-buffer, then out to the P-channel mosfets. The columns are selected by the TLC59284 which are essentially shift registers that can sink considerable (configurable) current, so you can avoid having many current limiting resistors for the LEDs.
The Kinetis MCU will be responsible for drawing the display, and receiving commands from the main controller. I have exposed the MCU's i2c, SPI and UART lines to headers.
The raw inputs for the row/column selection have also been broken out to the left side of the board - 4 pins are required (shift clk, in, latch + counter clk). This can be reduced by 1 if a solder bridge is used to tie the clock of the counter to the latch of the shift register.
Software overview
The software is still in the planning phases, but the rough plan is to use a slim RTOS like AtomThreads to both keep the display refeshed and take input from the host controller over i2c, SPI or serial.
The MCU will have an ASCII character set preloaded - but the command set will also allow the host to toggle single LEDs, rows and columns.
Parts
31| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | IRLML5203 | w_smd_trans:sot23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7 |
| 4 | VAOM-C07573G9-BW/32 | 5x7Controller:VAOM-A07573G9 | DS1, DS2, DS3, DS4 |
| 2 | 2.7K | w_smd_resistors:r_0603 | R1, R2 |
| 2 | TLC59284 | w_smd_dil:ssop-24 | U2, U3 |
| 1 | aurai:DP7043 | ||
| 1 | 0.1uF | w_smd_cap:c_0603 | C1 |
| 1 | 10uF | w_smd_cap:c_0603 | C2 |
| 1 | 220 | w_smd_resistors:r_0603 | R3 |
| 1 | 4022 | w_smd_dil:tssop-16 | U1 |
| 1 | 74HC540 | w_smd_dil:tssop-20 | U4 |
| 1 | CNT_CLK_SEL | w_details:3-way_bridge_0603 | J1 |
| 1 | HEADER_6 | w_pin_strip:pin_strip_6 | J2 |
| 1 | I2C | w_pin_strip:pin_socket_2 | J5 |
| 1 | LED | w_smd_leds:Led_0603 | LD1 |
| 1 | MKL02Z32VFM4 | Housings_DFN_QFN:QFN-32-1EP_5x5mm_Pitch0.5mm | U5 |
| 1 | PCB_DP_RECTANGLE-43X70 | dp_devices:dp_devices-DP7043_V1 | PCB1 |
| 1 | POGOPROG | 5x7Controller:POGOPROG-CONN-OH-SMALLERVIAS | J4 |
| 1 | PROGRAMMING | w_pin_strip:pin_strip_6 | J7 |
| 1 | SPI | w_pin_strip:pin_socket_4 | J3 |
| 1 | UART | w_pin_strip:pin_socket_2 | J6 |
Questions
How big is the 5x7 Controller PCB?
It measures 70 × 43 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 5x7 Controller use?
31 parts, built around the MKL02Z32VFM4, 74HC540D, TLC59284DBQ and IRLML5203. 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 5x7 Controller KiCad files?
From the rixth/5x7_Controller repository on GitHub, at the commit this page was made from: the board is hardware/5x7Controller.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the 5x7 Controller design in my own project?
Its repository states no licence, so its author keeps all rights: ask rixth before reusing the design.
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