AC Dimmer Module, 4 Channel, 3.3V/5V Logic

The AC Dimmer is designed to control the alternating current voltage, which can transfer current up to 10A-600V / 4A-400V (per channel). In most cases, dimmers are used to turn the power ON/OFF for lamps or heating elements, which can also be used for fans, pumps, air cleaners, etc.

Dimmers have become an often-used decision for smart home systems. For example, when you need to smoothly change the light brightness. The lamp slowly turns ON or OFF, creating a comfortable atmosphere. Dimmers work most effectively with filament lamps. It’s less stable with low brightness dimmable LED lamps, but with moderate and high brightness it will perform a solid job. Note that luminescent lamps (gas discharge lamps) do not support dimming.

A power of the dimmer is isolated from the control part, to exclude the possibility of high current disruption to a microcontroller. The logical level is tolerant to 5V and 3.3V, therefore it can be connected to the microcontroller with 5V and 3.3V level logic. In Arduino, a dimmer is controlled with RBDdimmer.h library, which uses external interrupts and process time interrupts. It simplifies the code writing and gives more processing time for the main code. This is why you can control multiple Dimmers from one microcontroller. The dimmer is connected to the Arduino controllers via two digital pins. First (Zero) to control the passing of Phase Null of AC, which is used to initiate the interrupt signal. Second (DIM/PSM) to control (dim) current. Note that Zero requires connection to designated microcontroller pins (which are different depending on the model of Uno, Nano, Leonardo, Mega), since it is tied to the microcontroller interrupts.

Quick Spec

• Power: up to 10A-600V / 4A-400V per channel
• AC Frequency: 50/60 Hz
• TRIAC: BTA16/BT168
• Isolation: Optocoupler
• Logic Level: 3.3V/5V
• Zero Point: Logic level
• Modulation (DIM/PWM): dimming 0 ~ 100%
• Signal Current: >10mA
• For indoor and outdoor use
• Operating Temperatures: −20°C ~ +80°C
• Operating Humidity: Dry environment only

Wiring Diagram

Code

Resources

• Product Page
• Arduino Library (RBDdimmer.h)

Shipping List

• 1 x AC Dimmer Module, 4 Channel, 3.3V/5V Logic