0-10V Analog from a 12VDC Source

Discussion in 'The Projects Forum' started by LEDGuy, Jul 2, 2009.

  1. LEDGuy

    Thread Starter New Member

    Jul 2, 2009
    1
    0
    I am being baffled by how hard it is to find a 0-10V analog control to manage dimming on an Advanced Mark 7 LED driver.

    This can't be a hard nut to solve... anyone out there have a simple linear 0-10V circuit I can build quickly?

    I have a 7W 12VDC power supply and just need a simple 0-10V analog output to control the dimmer (old school analog lighting controls)

    Help? I will give you credit...
     
  2. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
    1,758
    98
    For dimming common LEDs PWM is often the preferred method.
     
  3. DC_Kid

    Distinguished Member

    Feb 25, 2008
    638
    9
    an adjustable voltage regulator will work. a few parts and a pot to tune the voltage is all thats needed.
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    See the attached for a couple of ideas.

    The circuit on the left initially looks more attractive due to it's simplicity, but noise on the power supply (shown as V1) is coupled through to the output.

    The circuit on the right uses a 10v 1W Zener diode to establish the 0v-10v range. The 200 Ohm resistor limits the current through the Zener to around 10mA. Notice that the output from the wiper is much more stable than the circuit on the left.

    The .1uF caps are present to quiet down the noise from the resistors.
     
  5. kammenos

    Active Member

    Aug 3, 2008
    127
    0
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