Light Shield

The Light Shield gives the OpenMV Cam nine high-power white LEDs driven by a TPS61169 LED driver, with brightness controllable from the camera over PWM.

For full datasheet, photos, and ordering see the Light Shield product page.

Highlights

• Nine high-power white LEDs

• PWM dimming control from the OpenMV Cam

Pinout

Pin reference

Pin	Function
P6	PWM lighting control — drives the TPS61169 LED driver
VIN rail	Powers the LEDs (from the camera’s VIN pin)
3.3V rail	Powers the shield’s on-board electronics
GND rail	Common ground

Note

The shield draws LED power straight from the camera’s VIN pin. USB does not feed VIN on any OpenMV Cam, so VIN must be supplied externally (battery, bench supply, or similar) — pick a source rated for the combined current draw of all nine LEDs at full brightness.

Usage

PWM-dim the nine high-power LEDs through the TPS61169 driver on P6:

from machine import Pin, PWM
import time

pwm = PWM(Pin("P6"), freq=50_000, duty_u16=0)

while True:
    for i in range(101):              # ramp up
        pwm.duty_u16((i * 65535) // 100)
        time.sleep_ms(10)
    for i in range(101):              # ramp down
        pwm.duty_u16(((100 - i) * 65535) // 100)
        time.sleep_ms(10)