#2-Channel 0-10V I2C Digital to Analog DA...

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vapid cedar
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I was looking at the module and the only power inputs are from the ESP/Arduino so the max is 5v. How does this module able to vary the output from 0-10v when the max voltage is 5v? Sorry it is dumb question!

Im not using a Meanwell type driver which accepts PWM dimming so I need a true 0-10v analog input.

The driver/ballast is connected to the mains and also the LED's. There is also a separate DIM 2 wire (+ & -) which I was going to use this instead of the manual pot as I think the + from the dim is 10v.

In the datasheet the driver/ballast states you can use the supplied 0-25-50-75-100% dimming function via a pot type box. If I was to replace that with this using 1 channel to start I could then use increments of 1% as stated in the datasheet (its either manual 25% or 1% via external controller)

Cheers

spring elk
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Board has a 12V boost converter U1 MT3608. Makes 12V from 3.3V or 5V

vapid cedar
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Perfect, thank you very much sir

vapid cedar
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Cheers @spring elk you do mean boost to 10v right though?

spring elk
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Schematic show 12v tied to Vcc on DAC chip. DAC datasheet says it can be 10-13V, 40V absolute max. So it must have internal regulation to make 10V. Analog usually has voltage headroom, rail-to-rail is a lie, there is always a few tens of millivolts you never get to. So if you put 10.00v into Vcc, might expect max voltage to be 9.95V at dac output. Based on the .5% error on datasheet.

vapid cedar
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Well, its arrived and was hoping to convert the Arduino code to ESPHome. Don't Suppose there is a guide or something? I have scored the internet and found how to convert a sensor from IDE to ESPHome but not a DAC or similar.

The code etc is below if someone could help out:

https://wiki.dfrobot.com/SKU_DFR0971_2_Channel_I2C_0_10V_DAC_Module#target_2
https://github.com/DFRobot/DFRobot_GP8403

GitHub
GitHub - DFRobot/DFRobot_GP8403

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2-Channel 0-10V I2C Digital to Analog DAC Module Arduino Wiki -...

Wiki: This 2-Channel I2C to 0-10V DAC module can output a voltage of 0-5V or 0-10V, which can be widely used with most 0-10V devices on markets such as light controllers, inverters, valves, pumps, etc., by Arduino programming.