3. Dokumentation VC Compute Module Interface Board

Owned by Wilhelm Scheermann
Last updated: Feb 07, 2023
11 min read

 

 

Table of Contents

  1. General Information

  2. Technical Specifications

  3. Hardware Interfaces

3.1 Power, Trigger and PLC Connector POWIO

3.2 RS-232 and FPGA IO Connector RSIO

3.3 The CAM0 Socket

3.4 The CAM1 Socket

3.5 Display Interface Connector DISP1

3.6 RaspberryPi Compute Module Connector

3.7 Real Time Clock

3.8 JTAG Connector

4. FPGA Setup

5. Software Setup

5.1 Preparation

5.2 Driver Installation

5.3 GPIO Software Setup

5.4 Setting Flash Currents

5.5 Activating Flash output

6. Accessories

6.1 Order numbers of all available Accessories

 

1   General Information

The VC Compute Module Interface Board (CMI) is designed for a RaspberryPi CM3 Compute Module and CM3+. It has two MIPI connectors for connecting camera sensors. There are pins for triggering the image sensors and flash output pins with configurable current where several Power LEDs may be driven directly. The board features mounting options for our LED flash rings and camera sensors. Moreover it features an ethernet socket and an USB port as well as four PLC input and output lanes. There is also an Micro-SD card slot and a real time clock (RTC). A FPGA for managing triggering/flashing and input/output mappings is pre-programmed, but can also be reprogrammed directly by the customer.

 

2   Technical Specifications

Technical Data

Component / Feature

Specification

Component / Feature

Specification

Dimensions

125 x 57 x 30 mm (without mounting LED ring)

Trigger input

Opto-isolated, 8 mA @ 5 V

Process interface

PLC: 4 inputs / 4 outputs, outputs 4×200 mA, FPGA IO: 4 Digital LVCMOS (3.3 V) GPIOs

Trigger

1 flash trigger output at 24 V, 1 trigger input

LED driver

2 LED driver outputs (1 shared with flash trigger output)

Ethernet interface

1000 Mbit/s

Serial interface

Available as RS-232 interface

Storage Conditions

Temperature: -20 to +60 °C, Max. humidity: 90%, non condensing.

Operating Conditions

Temperature: 0 to +50 °C, Max. humidity: 80%, non condensing.

Nominal voltage Vdd for power supply

12–24 V DC

Nominal Power consumption

12 W (max, dependent on many things like hardware connected over USB, Flash LEDs, etc.) not including PLC outputs

 

3   Hardware Interfaces

VC CMI socket overview

(Top view)

VC CMI block diagram

VC CMI default FPGA block diagram

3.1 Power, Trigger and PLC Connector POWIO

Pin Assignment of POWIO Connector (DSUB - male)

CMI Socket Frontal View

Pin

Signal

Level

CMI Socket Frontal View

Pin

Signal

Level

 

1

Main Power Supply

Vdd

2

Common Ground

GND

3

PLC In0

+5–24 V

4

PLC Out0

Vdd

5

PLC In1

+5–24 V

6

PLC Out1

Vdd

7

PLC Out2

Vdd

8

PLC In2

+5–24 V

9

PLC Out3

Vdd

10

PLC In3

+5–24 V

11

FLASH0

Vdd 0–1.5 A

12

FLASH1

Vdd 0–1.5 A

13

N/C

—

14

TrigIn_P

+5 V

15

TrigIn_M

GND

All inputs are 5–24 V, 2.4 mA @ 5 V and 5 mA @ 24 V, 200 kHz max., threshold: positive +1.3 mA typ., negative 0.7 mA typ.

 

3.1.1 POWIO PLC IOs

Electrical Specifications of digital PLC IOs

Separation of PLC/trigger output voltage

PLC outputs supply not separated from power supply

PLC Input Voltage

Identical with power supply voltage

PLC Input Current (max)

2.4 mA @ 5 V and 5 mA @ 24 V, 200 kHz max., threshold: positive +1.3 mA typ., negative 0.7 mA typ.

PLC Output Voltage

Identical with power supply Voltage — internally connected

PLC Output Current (max)

4 × 200 mA Max total of all outputs: 0.8 A

Max Current for 1 Power / PLC connector pin

200 mA

Power failure detection

Poly Fuse

The maximum combined current of all outputs should not exceed 1 A.

 

3.1.2   POWIO Trigger Input

Electrical Specifications of the trigger Input

Separation of trigger input

Yes, optically isolated, 8 mA @ 5 V

 

3.1.3   POWIO/LED A Flash Output

The Hardware features two independently adjustable current sources for the connection of two LED light sources. They are designed for controlling the ring illuminators around the lens, connected to LED A. They are also accessible over the connector POWIO.

The controller covers a current range from 150 to 1500 mA.

The duty cycle is limited to 1:8, i.e. the off-state is eight times longer than the on-state for the output. Example: 1 ms flash duration, 8 ms cool down duration.

The default FPGA has a protection which limits the maximum flash duration to 2 ms. This is to protect LEDs which cannot support 1.5 A over a longer time period. For developping own LED rings, there is also an analogue protection at FLASH1 while the FLASH0 can theoretically support 1.5 A steady (please note, that this current is not calculated to the nominal power consumption).

Technical Data for each LED Controller

Iout

150–1500 mA, programmable

Uout

4–16 V (1–4 LEDs in series depending on the Vf)

Do not connect inductive loads to FLASH0 or FLASH1 outputs!

The default FPGA limits the maximum flash duration to 2 ms of both flash outputs for LED protection, while FLASH1 is additionally limited by a slower analogue protection circuit.

FLASH0 and FLASH1 behave different: While the FLASH0 output can be used for triggering, the FLASH1 output is not intended for triggering external flash!

FLASH1 has a small steady current flow for providing an instant power supply. This may lead to dark glimming LEDs connected to the FLASH1 output while LEDs connected to the FLASH0 output won't emit light (i.e. one half of a VC LED ring would glow).

3.1.3.1   Connection of Flash Outputs: External Flash

The figure shows how to connect an external flash illumination to FLASH0/TrigOut signal by using an opto isolation. R limit should be chosen to protect the opto isolator, e.g. 2K2/250 mW for a current of 10 mA. Remark: R limit is not necessary for Vision Components' High Power IR Illumination (VK002180). The current source should be set to 500 mA.

FLASH1 output is not intended for triggering an external flash!

 

3.1.3.2   Connection of Flash Outputs: Direct High-Power-LEDs

The figure shows how to connect an external flash illumination. The current source should be set to the required current setting between 200 and 1500 mA. The time limit must be set to an appropriate value for the protection of the LEDs according to the data sheet of the manufacturer. Connectable are 1 to 6 High Power LEDs.

3.1.3.3   Connection of Flash Outputs: PLC

The figure shows how to connect a PLC to the FLASH0/TrigOut or FLASH1 signal. The current source should be set to 500 mA.

FLASH1 output is not intended for triggering an external flash!

3.1.3.4   Connection of LED Rings over LED A: Internal Flash
Pin Assignment of LED A and LED B Connector

Camera Socket Top View

Pin

LED A Signal

LED B Signal

Camera Socket Top View

Pin

LED A Signal

LED B Signal

1

GND

GND

2

N/C

N/C

3

FLASH0

N/C

4

FLASH1

N/C

The current source should be set to the required current setting between 200 and 1500 mA. The time limit must be set to an appropriate value for the protection of the LEDs according to the data sheet of the manufacturer.

Be careful not to produce a short circuit between the VC MIPI sensor (which has a grounded surface) and the LED ring!

 

3.2 RS-232 and FPGAIO Connector RSIO

A FPGA IO connects to the onboard FPGA which itself may also be programmed to have connections to some RaspberryPi GPIOs.

Pin Assignment of RSIO Connector

Camera Socket Top View

Pin

Signal

Additional Information

Camera Socket Top View

Pin

Signal

Additional Information

1

V24_TxD

Native RS-232 interface

2

+3.3 V

—

3

V24_RxD

Native RS-232 interface

4

FPGA IO 1

Digital LVCMOS (3.3 V)

5

GND

—

6

FPGA IO 2

Digital LVCMOS (3.3 V)

7

FPGA IO 0

Digital LVCMOS (3.3 V)

8

FPGA IO 3

Digital LVCMOS (3.3 V)

 

3.3 The CAM0 Socket

The CAM0 Socket connects to CSI0 but to I2C1 for compatibility. The CAM0 Socket only supports 2 MIPI data lanes in contrast to the CAM1 socket with 4 lanes.

Beneath the CAM0 socket is a LED which emits green light if the CAM0 socket is powered.

Pin connections of the CAM0 Socket

Camera Socket

Pin

Signal

Camera Socket

Pin

Signal

 

1

+3.3 V

2

I2C1 SDA

3

I2C1 SCL

4

GND

5

FPGA CAM0 FLASH

6

FPGA CAM0 TRIG

7

GND

8

N/C

9

N/C

10

GND

11

N/C

12

N/C

13

GND

14

CSI0 CP

15

CSI0 CN

16

GND

17

CSI0 DP1

18

CSI0 DN1

19

GND

20

CSI0 DP0

21

CSI0 DN0

22

GND

3.4 The CAM1 Socket

The CAM1 socket connects to CSI1 but to I2C0 for compatibility. Only this Socket supports 4 MIPI data lanes.

Beneath the CAM1 socket is a LED which emits green light if the CAM1 socket is powered.

Pin connections of the CAM1 Socket

Camera Socket

Pin

Signal

Camera Socket

Pin

Signal

 

1

+3.3 V

2

I2C0 SDA

3

I2C0 SCL

4

GND

5

FPGA CAM1 FLASH

6

FPGA CAM1 TRIG

7

GND

8

CSI1 DP3

9

CSI1 DN3

10

GND

11

CSI1 DP2

12

CSI1 DN2

13

GND

14

CSI1 CP

15

CSI1 CN

16

GND

17

CSI1 DP1

18

CSI1 DN1

19

GND

20

CSI1 DP0

21

CSI1 DN0

22

GND

3.5 Display Interface Connector DISP1

The DISP1 Socket connects to DSI1 but to I2C0 for compatibility.

Pin Assignment of DISP1 Connector

Display Socket Top View

Pin

Signal

Display Socket Top View

Pin

Signal

 

1

GND

2

DSI1 DN1

3

DSI1 DP1

4

GND

5

DSI1 CN

6

DSI1 CP

7

GND

8

DSI1 DN0

9

DSI1 DP0

10

GND

11

I2C0 SCL

12

I2C0 SDA

13

GND

14

+3.3 V

15

+3.3 V

16–30

N/C

The display itself needs the dt-blob.bin generated from the dt-blob.dts and copied into the /boot (not /boot/overlays) directory.

3.6 RaspberryPi Compute Module Connector

3.6.1 RaspberryPi GPIO Connections

GPIO Connections at RaspberryPi

GPIO-Nr.

Direction

Connects to

GPIO-Nr.

Direction

Connects to

GPIO 0

I/O

I2C0 SDA

GPIO 1

I/O

I2C0 SCL

GPIO 2

I/O

I2C1 SDA

GPIO 3

I/O

I2C1 SCL

GPIO 4

I/O

FPGA RPI GPIO A

GPIO 5

I/O

FPGA RPI GPIO B

GPIO 6

I/O

FPGA RPI GPIO C

GPIO 7

I/O

FPGA RPI GPIO D

GPIO 8

I/O

FPGA SPI0 CE0 N

GPIO 9

I/O

FPGA SPI0 MISO

GPIO 10

I/O

FPGA SPI0 MOSI

GPIO 11

I/O

FPGA SPI0 SCLK

GPIO 12

I/O

FPGA RPI GPIO E

GPIO 13

I/O

FPGA RPI GPIO F

GPIO 14

I/O

RSIO V24_TxD

GPIO 15

I/O

RSIO V24_RxD

GPIO 16

I/O

FPGA RPI GPIO G

GPIO 17

I/O

FPGA RPI GPIO H

GPIO 18

I/O

FPGA RPI GPIO I

GPIO 19

I/O

FPGA RPI GPIO J

GPIO 20

I/O

FPGA RPI GPIO K

GPIO 21

I/O

FPGA RPI GPIO L

GPIO 22

N/C

—

GPIO 23

I/O

FPGA I2C SDA

GPIO 24

I/O

FPGA I2C SCL

GPIO 25

N/C

—

GPIO 26

N/C

—

GPIO 27

N/C

—

GPIO 28

INPUT

PULLDOWN

GPIO 29

INPUT

PULLDOWN

GPIO 30

N/C

—

GPIO 31

N/C

—

GPIO 32

N/C

—

GPIO 33

N/C

—

GPIO 34

I/O

SD1 CLK

GPIO 35

I/O

SD1 CMD

GPIO 36

I/O

SD1 DAT0

GPIO 37

I/O

SD1 DAT1

GPIO 38

I/O

SD1 DAT2

GPIO 39

I/O

SD1 DAT3

GPIO 40

I/O

SD1 DAT4

GPIO 41

I/O

SD1 DAT5

GPIO 42

I/O

SD1 DAT6

GPIO 43

I/O

SD1 DAT7

GPIO 44

INPUT

PULLDOWN

GPIO 45

INPUT

PULLDOWN

3.6.1 RaspberryPi USB Connections

The Pins USB DP and USB DM connect to an USB hub with two devices attached:

  • Gigabit Ethernet, and

  • the USB socket.

The hub is driven by a 24 MHz clock by the default FPGA.

 

3.7 Real Time Clock

The Maxim DS1374 RTC is connected to the FPGA I2C bus. It is accessible over address 0x68. An accumulator which buffers the RTC must be activated to be charged: The only allowed values for register 0x09 to be written are 0xaa for charging, and 0x00.

Example

This is a low-level approach as root. We assume the RTC is already detected as 0x68 at I2C bus 3, check with:

i2detect 3

beforehand. This sequence should activate charging:

modprobe -r rtc_ds1374

i2ctransfer -y 3 w2@0x68 0x09 0xaa

i2ctransfer -y 3 w1@0x68 0x09 r1@0x68

modprobe rtc-ds1374

hwclock --systohc

hwclock -r

 

3.8 JTAG Connector

The JTAG connector is the JTAG interface for programming the onboard FPGA.

Pin Assignment of the JTAG Connector

Camera Socket Top View

Pin

Signal

Camera Socket Top View

Pin

Signal

 

1

+3.3 V

2

FPGA TCK

3

FPGA TDI

4

FPGA TDO

5

FPGA TMS

6

GND

Information about programming the FPGA is covered in an extra document.

 

4 FPGA Setup

A default FPGA circuit is factory pre-programmed.

It has the following behaviour:

  • Powers up both mipi sockets,

  • Provides a 24 MHz clock for the USB hub which connects Ethernet and the USB port to the RaspberryPI,

  • Common resetting functionality for the compute module itself (signal run) and for the rest of the board,

  • Redirection of the POWIO TrigIn signal to both mipi modules,

  • Redirection of both mipi module flash signals to both FLASH0 and FLASH1,

  • Digital protection of FLASH0 and FLASH1 by limiting the flash output duration to 2 ms.

  • Redirection of FPGA RPI GPIO A … FPGA RPI GPIO D to PLC Out0 … PLC Out3, which effectively connects GPIO 4 … GPIO 7 with PLC Out0 … PLC Out3.

Information about programming the FPGA is covered in an extra document.

5 Software Setup

For the following we assume you are using Raspbian Buster.

5.1 Preparation

For using the RaspberryPi Compute Module at the VC CMI board, it has to be flashed beforehand with a Raspbian Buster image.

At the time of writing, Raspbian Buster has neither enabled the UART interface, nor the SSH remote access. This means, that you cannot login to your system without prior modification of the /boot/config.txt (UART) and/or activation of the SSH server (raspi-config).

  • For activation of the UART, and thus the RS232 interface at RSIO, add the following line to your /boot/config.txt:

dtoverlay=uart0

  • For activation of the SSH server, start the raspi-config program by running the following command:

sudo raspi-config

Then select Interfacing Options, then SSH and agree the question whether to enable the SSH server with <Yes>, leave the program

5.2 Driver Installation

There is a DKMS driver as Debian package available for the VC MIPI modules which include the setup for the CMI GPIOs. Please visit our website to get it.

Debian packages can be installed by using the command dpkg -i.

5.3 GPIO Software Setup

Not mentioned GPIOs may use their default function.

Function Selection for individual GPIOs

GPIO-Nr.

Selector

Becomes

Why

GPIO-Nr.

Selector

Becomes

Why

GPIO 0

ALT 0

I2C0_SDA

Communication with CAM1

GPIO 1

ALT 0

I2C0_SCL

Communication with CAM1

GPIO 2

ALT 0

I2C1_SDA

Communication with CAM0

GPIO 3

ALT 0

I2C1_SCL

Communication with CAM0

GPIO 4

OUTPUT

OUTPUT

Access to PLC Out0 [1]

GPIO 5

OUTPUT

OUTPUT

Access to PLC Out1 [1]

GPIO 6

OUTPUT

OUTPUT

Access to PLC Out2 [1]

GPIO 7

OUTPUT

OUTPUT

Access to PLC Out3 [1]

GPIO 8

ALT 0

SPIO0_CE0_N

SPI utilisation at FPGA

GPIO 9

ALT 0

SPIO0_MISO

SPI utilisation at FPGA

GPIO 10

ALT 0

SPIO0_MOSI

SPI utilisation at FPGA

GPIO 11

ALT 0

SPIO0_SCLK

SPI utilisation at FPGA

GPIO 12

INPUT

INPUT

Access to PLC In0 [1]

GPIO 13

INPUT

INPUT

Access to PLC In1 [1]

GPIO 14

ALT 0

UART0_TX

RS-232 access over RSIO

GPIO 15

ALT 0

UART0_RX

RS-232 access over RSIO

GPIO 16

INPUT

INPUT

Access to PLC In2 [1]

GPIO 17

INPUT

INPUT

Access to PLC In3 [1]

GPIO 18

OUTPUT

OUTPUT

Access to FPGA IO 0 over RSIO [1]

GPIO 19

OUTPUT

OUTPUT

Access to FPGA IO 1 over RSIO [1]

GPIO 20

INPUT

INPUT

Access to FPGA IO 2 over RSIO [1]

GPIO 21

INPUT

INPUT

Access to FPGA IO 3 over RSIO [1]

GPIO 23

INPUT

INPUT

Soft-I2C3 to RTC and Flash current setting [1]

GPIO 24

INPUT

INPUT

Soft-I2C3 to RTC and Flash current setting [1]

⋮

—

—

GPIO 25–GPIO 37 unused

GPIO 28

INPUT

INPUT

externally pulled down

GPIO 29

INPUT

INPUT

externally pulled down

⋮

—

—

GPIO 30–GPIO 33 unused

GPIO 34

ALT 3

SD1_CLK

Access to Micro-SD card slot

GPIO 35

ALT 3

SD1_CMD

Access to Micro-SD card slot

GPIO 36

ALT 3

SD1_DAT0

Access to Micro-SD card slot

GPIO 37

ALT 3

SD1_DAT1

Access to Micro-SD card slot

GPIO 38

ALT 3

SD1_DAT2

Access to Micro-SD card slot

GPIO 39

ALT 3

SD1_DAT3

Access to Micro-SD card slot

GPIO 40

ALT 3

SD1_DAT4

Access to Micro-SD card slot

GPIO 41

ALT 3

SD1_DAT5

Access to Micro-SD card slot

GPIO 42

ALT 3

SD1_DAT6

Access to Micro-SD card slot

GPIO 43

ALT 3

SD1_DAT7

Access to Micro-SD card slot

[1]

(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14) at least if using the default FPGA.

GPIO in- and outputs can be accessed over the linux standard way via /sys/class/gpio, see: https://www.kernel.org/doc/Documentation/gpio/sysfs.txt

You may install the program named raspi-gpio by executing:

sudo apt install raspi-gpio

See the help text of the program how to change the function of the GPIOs. A good output will look like this:

BANK0 (GPIO 0 to 27):

GPIO 0: level=1 fsel=4 alt=0 func=SDA0

GPIO 1: level=1 fsel=4 alt=0 func=SCL0

GPIO 2: level=1 fsel=4 alt=0 func=SDA1

GPIO 3: level=1 fsel=4 alt=0 func=SCL1

GPIO 4: level=0 fsel=1 func=OUTPUT

GPIO 5: level=0 fsel=1 func=OUTPUT

GPIO 6: level=0 fsel=1 func=OUTPUT

GPIO 7: level=0 fsel=1 func=OUTPUT

GPIO 8: level=1 fsel=4 alt=0 func=SPI0_CE0_N

GPIO 9: level=0 fsel=4 alt=0 func=SPI0_MISO

GPIO 10: level=0 fsel=4 alt=0 func=SPI0_MOSI

GPIO 11: level=0 fsel=4 alt=0 func=SPI0_SCLK

GPIO 12: level=1 fsel=0 func=INPUT

GPIO 13: level=1 fsel=0 func=INPUT

GPIO 14: level=1 fsel=4 alt=0 func=TXD0

GPIO 15: level=1 fsel=4 alt=0 func=RXD0

GPIO 16: level=1 fsel=0 func=INPUT

GPIO 17: level=1 fsel=0 func=INPUT

GPIO 18: level=0 fsel=1 func=OUTPUT

GPIO 19: level=0 fsel=1 func=OUTPUT

GPIO 20: level=0 fsel=0 func=INPUT

GPIO 21: level=0 fsel=0 func=INPUT

GPIO 22: level=0 fsel=0 func=INPUT

GPIO 23: level=1 fsel=0 func=INPUT

GPIO 24: level=1 fsel=0 func=INPUT

GPIO 25: level=0 fsel=0 func=INPUT

GPIO 26: level=0 fsel=0 func=INPUT

GPIO 27: level=0 fsel=0 func=INPUT

BANK1 (GPIO 28 to 45):

GPIO 28: level=0 fsel=0 func=INPUT

GPIO 29: level=0 fsel=0 func=INPUT

GPIO 30: level=0 fsel=0 func=INPUT

GPIO 31: level=0 fsel=0 func=INPUT

GPIO 32: level=0 fsel=0 func=INPUT

GPIO 33: level=0 fsel=0 func=INPUT

GPIO 34: level=0 fsel=7 alt=3 func=SD1_CLK

GPIO 35: level=1 fsel=7 alt=3 func=SD1_CMD

GPIO 36: level=1 fsel=7 alt=3 func=SD1_DAT0

GPIO 37: level=1 fsel=7 alt=3 func=SD1_DAT1

GPIO 38: level=1 fsel=7 alt=3 func=SD1_DAT2

GPIO 39: level=1 fsel=7 alt=3 func=SD1_DAT3

GPIO 40: level=1 fsel=7 alt=3 func=SD1_DAT4

GPIO 41: level=1 fsel=7 alt=3 func=SD1_DAT5

GPIO 42: level=1 fsel=7 alt=3 func=SD1_DAT6

GPIO 43: level=1 fsel=7 alt=3 func=SD1_DAT7

GPIO 44: level=0 fsel=0 func=INPUT

GPIO 45: level=0 fsel=0 func=INPUT

BANK2 (GPIO 46 to 53):

GPIO 46: level=1 fsel=0 func=INPUT

GPIO 47: level=1 fsel=1 func=OUTPUT

GPIO 48: level=0 fsel=4 alt=0 func=SD0_CLK

GPIO 49: level=1 fsel=4 alt=0 func=SD0_CMD

GPIO 50: level=1 fsel=4 alt=0 func=SD0_DAT0

GPIO 51: level=1 fsel=4 alt=0 func=SD0_DAT1

GPIO 52: level=1 fsel=4 alt=0 func=SD0_DAT2

GPIO 53: level=1 fsel=4 alt=0 func=SD0_DAT3

 

5.4 Setting Flash Currents

At the default setup of the FPGA the flash output controller is accessable over the I2C Soft-GPIO. The value to write is calculated by the following formula:

val = (Iout * 192 / 1500) << 4

The I²C flash controller does not have register addresses, so submit the desired value using an I2C block write to the I²C flash controller address.

Flash output controller I²C Addresses

Address

Influence

Address

Influence

0x0e

FLASH0

0x0d

FLASH1

Example

This is a low-level approach as root to set the current of FLASH0, we assume a current of 1.5 A which implies a value of 193 or 0x0C10:

modprobe i2c-dev

i2cdetect 3

i2cset -y 3 0x0e 0x0C 0x10 i

 

5.5 Activating Flash output

The configuration file /boot/config_vc-mipi-driver-bcm2835.txt is available after installing the driver package. It has a parameter to configure the I/O of each connected sensor. Look at the documentation for your sensor type which value is appropriate for the device tree parameter cam0_io_config or cam1_io_config.

 

6 Accessories

6.1 Order numbers of all available Accessories

CMI Accessories

Order Number

Product / Service description

Order Number

Product / Service description

EK003260

Flexible Printed Circuit (FPC) Cable, 200 mm: 22 to 22 Pin

VK002212

LED Ring Light - red 640 nm

VK002213

LED Ring Light - IR 850 nm

VK002876

LED Ring Light - White