2 layers191.3 × 181.7 mm
IO Card G3
PerMalmberg/IO-Card-G3
This is my custom I/O card, third generation. Main purpose is to serve as an alarm system.
400 parts7MIT
2 layers72.3 × 36.1 mm
Multichannel led driver
rossuthoff/multichannel_led_driver1LED driver for up to nine LED strings
- Size
- 72.3 × 36.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 340
- Nets
- 55
- Pads
- 481
- Tracks, vias
- 419, 51
- Pours
- 16
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 2 May 2018
- Updated
- 2 May 2018
Overview
Multichannel led driver is an open-source printed circuit board by rossuthoff, from the rossuthoff/multichannel_led_driver repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 72.3 × 36.1 mm with 340 parts on 55 nets, routed with 419 tracks and 51 vias.
It is built around the SI2312CDS. Its parts include 33 resistors, 18 transistors, 8 capacitors, 3 connectors and 2 ICs.
Main components
1README
README.md
multichannel_led_driver
Switching boost LED driver based on the Linear Technology LT3478-1 chip.
related repositories
This design requires the footprints found in the kicad_footprints repository. Make sure the library and .mod files are added to your folder search locations. This board utilizes the ytai/IOIO microcontroller (MCU) and is designed to match to its header layout. Other microcontrollers that can send 3.3 V signals and control an I2C interface may be used.
general use
power supply
LED driver is used in boost mode. The battery voltage must be less than the voltage drop across each individual LED string. Header connnection between this board and the IOIO board provide power to the MCU.
led strings
Connect the LED strings to V+ (anode) and V1 through V9 (cathodes) connections. The LED string to be illuminated is controlled through a 3.3V signal to the s1 through s9 pins. The applied current is controlled through a Analog Devices AD5247 digital potentiometer with an I2C interface.
references
Parts
340| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 510 | Resistors_SMD:R_0603 | R17, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32, R33 +2 |
| 11 | 10k | Resistors_SMD:R_0603 | R4, R5, R7, R8, R9, R10, R11, R12, R13, R14, R16 |
| 9 | Si2312CDS | TO_SOT_Packages_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q9, Q10, Q11, Q12, Q17 |
| 9 | Si2315BDS | TO_SOT_Packages_SMD:SOT-23 | Q5, Q6, Q7, Q8, Q13, Q14, Q15, Q16, Q20 |
| 4 | CONN_01X03 | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | , , , |
| 4 | Mounting_Hole | Mounting_Holes:MountingHole_3.2mm_M3 | , , , |
| 3 | CONN_01X02 | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | , , |
| 3 | F_1mm | footprints:Fiducial_1mm_Dia_2mm_Outer_CopperTop | , , |
| 2 | 0.1uF | Capacitors_SMD:C_0603 | C5, C7 |
| 2 | 1uF | Capacitors_SMD:C_0603 | C4, C6 |
| 2 | CONN_01X04 | Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm | , P16 |
| 1 | 100k | Resistors_SMD:R_0402 | R1 |
| 1 | 10u | Capacitors_Tantalum_SMD:CP_Tantalum_Case-A_EIA-3216-18_Reflow | C8 |
| 1 | 10uF | Capacitors_SMD:C_1812 | C3 |
| 1 | 1k | Resistors_SMD:R_0603 | R6 |
| 1 | 24k | Resistors_SMD:R_0402 | R2 |
| 1 | 3.3uF | Capacitors_SMD:C_0603 | C1 |
| 1 | 4.7uF | Capacitors_SMD:C_1206 | C2 |
| 1 | 6.8uH | footprints:Sumida_L_CDRH105R | L1 |
| 1 | 69.8k | Resistors_SMD:R_0402 | R3 |
| 1 | AD5247 | footprints:SC-70-6 | U3 |
| 1 | CONN_01X02 | Connectors_JST:JST_PH_S2B-PH-SM4-TB_02x2.00mm_Angled | J4 |
| 1 | CONN_01X04 | Connectors_JST:JST_PH_S4B-PH-SM4-TB_04x2.00mm_Angled | J1 |
| 1 | CONN_01X06 | Connectors_JST:JST_PH_S6B-PH-SM4-TB_06x2.00mm_Angled | P2 |
| 1 | D_Schottky_AAK | footprints:D_PowerDI-5 | D1 |
| 1 | LED | footprints:LED_0603 | D2 |
| 1 | LT3478-1 | footprints:TSSOP-16-1EP_4.4x5mm_Pitch0.65mm | U1 |
| 1 | SW_SPST | footprints:C&K_SPST_switch_L101011MS02Q | SW1 |
The 84 most common of 340 parts.
Questions
How big is the Multichannel led driver PCB?
It measures 72.3 × 36.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Multichannel led driver use?
340 parts, built around the SI2312CDS. 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 Multichannel led driver KiCad files?
From the rossuthoff/multichannel_led_driver repository on GitHub, at the commit this page was made from: the board is multichannel_led_driver.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Multichannel led driver design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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