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I've raspberry pi 4 and I'm building a project that simulate sunrise and sundown.

I've found that LED - WYZM HBL-100W that get 220AC AND DC 10V, I can dim it by lower or increase DC voltage level.

for that Iv'e create this ampifier module that will be connected to the raspberry: NULL the module work perfectly, I've check and it can provide voltage range(0-10).

When i've finish the the hardware I've plug the LED into the ampifier, And it's control the dim level, but its can't turn it off when I give 0v.

this is the PYTHON code: 

import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BOARD)
GPIO.setup(12, GPIO.OUT)
p = GPIO.PWM(12,50)
p.start(50)

p.ChangeDutyCycle(0); #Still on!

I've disamble the ampifier and the LED, and check the Voltage level on the ampifier and it show 0.0V, and when I reconnect the ampifier to the LED the DC shows 0.54V on the multi meter.

I know its not problem on the raspberry or on the ampifier, I guess its on the LED, but maybe I missing something.

Thank you in andvance!

Itzik.B
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1 Answers1

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For 0-10V DC Dimming, 0V does not equate to 0 light output. The dimming ballast or drivers are rated for a 10-100% or 1-100% dimming range. To turn the fixture completely off, you also need a relay that kills power to the driver or ballast at the bottom end of the 0-10V range.

Adam Geron
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