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LED controller

Llamero·30mm_cage_plate_LED_MCPCB·KiCAD/LED Controller/LED controller.kicad_pcb

LED controller PCB layout, top view — open source NXP board by Llamero
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About the LED controller PCB

LED controller is an open source NXP PCB design by Llamero, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 100 × 100 mm, with 38 components from 18 distinct parts.

Its main chip is the Teensy4.1, from the NXP family. Other key parts include the 4x Gate Driver, 3x Analog Switch, 3x 10-Bit DAC and 3x Level Shifter. By type, the board carries 12 capacitors, 7 ICs, 5 connectors, 4 resistors, 3 switches and 2 diodes.

From the project

LED mount that is compatible with the Thorlabs 30 mm cage plate

The LEDs on the board are closely spaced so that all four LEDs efficiently couple into a 5 mm liquid light guide or other optical paths.

Each board can drive up to four individual LEDs, and includes a thermistor for temperature monitoring. The the LED current is regulated by an AL8843, allowing LEDs to be driven with up to three amps of current. The AL8843 also allows for both PWM control as well as analog current control down to 10% of the current limit (see below for setting max current limit).

LED controller, from the project README
From the project README

Main components on the LED controller

4x Gate DriverTeensy4.13x Analog Switch3x 10-Bit DAC3x Level Shifter

LED controller bill of materials (BOM)

38 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
3
4x Gate Driver
Texas Instruments
U1, U2, U3
1
Teensy4.1
SparkFun Electronics
U4
1
3x Analog Switch
Texas Instruments
U5
1
3x 10-Bit DAC
Texas Instruments
U6
1
3x Level Shifter
Nexperia USA Inc.
U7
1
Barrel_Jack_Switch
Tensility International Corp
J1
1
4x RJ45
Amphenol ICC (Commercial Products)
J2
1
8P8C_Shielded
Amphenol ICC (Commercial Products)
J5
1
Conn_01x03_Socket
Harwin Inc.
J6
1
Conn_01x02_Socket
Adam Tech
J7
2
15V DC-DC
Diwell Electronics
PS1, PS2
3
10k
TT Electronics/BI
RV1, RV2, RV3
3
ELUMOASAQ2C22
C&K
SW1, SW2, SW3
2
BAT54BRW
Diodes Incorporated
D1, D2
11
1µF
Samsung Electro-Mechanics
C1, C2, C3, C4, C5, C6, C7, C8 +3
1
220µF
Rubycon
C12
3
3600
Bourns Inc.
RN1, RN2, RN4
1
390
YAGEO
RN3

LED controller design files

The KiCad project lives in the Llamero/30mm_cage_plate_LED_MCPCB repository on GitHub; these links point at the commit this page was built from.

LED controller: common questions

What microcontroller does the LED controller use?

The LED controller is built around the Teensy4.1, from the NXP family.

How big is the LED controller PCB?

The LED controller measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LED controller?

38 components, from 18 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the LED controller design files?

From the Llamero/30mm_cage_plate_LED_MCPCB repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the LED controller design in my own project?

Yes, under the terms of its CC-BY-SA-4.0 license, which Llamero chose for the repository.

Can I test firmware for the LED controller without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug NXP firmware against it before you order a PCB.

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