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Triac 0-10V control

Pips

Hello,

The goal is to control thru a triac a low power 24VAC load, by a 0-10VDC setpoint

Generating a synchronizied ramp and zero crossing detection, comparating and firing the triac is well known.

BUT : is somebody knowing an IC to do that (the goal is space saving) ?

Thank you for your ideas

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  • 0

    The application isn't clear to me but here is a way to save space on a duty cycle controller....it doesn't even need a separate power supply.

    https://www.eeworldonline.com/simplifying-solid-state-lighting-control/

  • 0 in reply to dougw

    Hello Doug,

    The application is not the matter, but if you are interested let's explain it :

    80 lamps lighting the audience in a theater.

    The original (35 years old) system was controlled by 4 buttons on several control panels : 100%, 40%, 0%, stop ... value changing from on to another following a ramp. This old system sent the reference to the dimmers as 0-10Vdc.

    I build a new system (8051 based)  keeping these buttons functions, but permetting to switch to Dmx control from the light desk.

    The new system include both set-point outputs : 0-10Vdc and Dmx, to be compatible with various dimmers. Everything works perfectly.

    It include also a curve correction thru a table in the processor.

    And now I want that the light intensity of the 100% button follow the hall intensity. And the bulding wiring is pretty messy. The control power for everything (buttons, relays, contactors, button's lamps,...) is 24Vac, with the 0/24Vac grounded ! That's why I choose to keep the control of this lamp by a regulated 24Vac as it was ...

     Thank for your help. The schematic you mentionned is harware controlled, I need to control via an analog set-point. Integrated !

    Best regards

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  • 0 in reply to dougw

    Hello Doug,

    The application is not the matter, but if you are interested let's explain it :

    80 lamps lighting the audience in a theater.

    The original (35 years old) system was controlled by 4 buttons on several control panels : 100%, 40%, 0%, stop ... value changing from on to another following a ramp. This old system sent the reference to the dimmers as 0-10Vdc.

    I build a new system (8051 based)  keeping these buttons functions, but permetting to switch to Dmx control from the light desk.

    The new system include both set-point outputs : 0-10Vdc and Dmx, to be compatible with various dimmers. Everything works perfectly.

    It include also a curve correction thru a table in the processor.

    And now I want that the light intensity of the 100% button follow the hall intensity. And the bulding wiring is pretty messy. The control power for everything (buttons, relays, contactors, button's lamps,...) is 24Vac, with the 0/24Vac grounded ! That's why I choose to keep the control of this lamp by a regulated 24Vac as it was ...

     Thank for your help. The schematic you mentionned is harware controlled, I need to control via an analog set-point. Integrated !

    Best regards

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