Okay so, I’m currently working on a final year project about vein visualization with Raspberry Pi 3 Model B+ and a NoIR camera V2. An infrared light source is required to capture clear vein image. I’ve tried connecting a 3w IR LED module with adjustable resistor to my camera board by it doesn’t seem to work on NoIR V2. So I found an alternative for the IR light source as below. Is there any way that I can power this 24pcs infrared illuminator board using GPIO pins with pulse control through pwm? Thanks!
The specification of this board is as follows:
Product size: 44x17mm
Light light: Infrared
Infrared power: 2W
Input voltage: DC 12V
Structure: PC board
Light angle: 90 degree
Night vision distance: 20-30 meters
Wavelength range: 850nm
Adaptive lens: 3.6mm, 6mm, 8mm, 12mm, 16mm single board machine small lens.
LED cup angle: 15, 30, 45, 60, 90°
Compatible Shell: 50 Bullet Camera
I can’t comment on the specific devices, BUT there are some general principles.
You definitely can’t power a 3W LED (or anything else) from GPIO 3W => 1A; GPIO can source 16 mA!
Depending on the Pi model you can draw ~800mA from the 3.3V regulator, so you couldn’t power from the Pi.
Even powering from the 5V rail would be pushing the friendship.
As the module pictured is labelled 12V it kind of suggests it needs 12V to run!
You probably could control by the Pi using suitable external power and suitable circuitry, but without knowing the detail it is impossible to say.