I'd like to use this as a soft-start controller for some outdoor incandescent lights. Can I configure it to do that without a cpu board attached?

You can use this item with potentiometer and adjust the brightness of dimmable lights https://www.amazon.com/dp/B06Y1DT1WP?ref=myi_title_dp

What PWM frequency sould one use to control this dimmer? Should it match the A/C frequency?

I tried those and you can’t really control a triac with PWM. When a triac turns on it will stay on until the current invert means when the sinusoid passes the Ov axis. You need to delay the triac command from the Zero information. More you delay it more you dim. The delay is from Oms full on to 8.333ms for off. If you control a light between about 6ms to 8ms it’s going to flake. The Zero information needs to trigger an interruption and in the interruption function you delay the command. I use delayMicroseconds().

What is the maximum wattage I can put through this?

They support up to 2A. So 110V*2A= 220watt

Where is some simple code for one unit connected to one arduino uno? if i have to reverse engineer what's on github it gets one star.

Hi We love to help our customers. Did you check this link for sample code? please see below link. If it does not help you can you please give me more information why it does not help you. Thank you https://github.com/RobotDynOfficial/RBDDimmer

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3 pcs Genuine PWM Ac Programmable Light Dimmer 110V - 220V AC Module Controller Compatible 50/60hz 3.3V/5V Logic Compatible with Arduino, STM, ARM, Raspberry

Product ID: 208400096

Details

Brand
IOT DynRobot
CPU Model
None
Cache Size
2 MB
Color
White
Graphics Card Description
This is the of
Included Components
Dimmer

⚡240V/8A max power control

🔄50/60Hz AC phase control

🧠3.3V/5V logic compatible

Rp1152701

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Description

💡 Dim your world, amplify your smart home vibes!

SMART HOME READY - Elevate your automation projects with reliable phase control for lighting & appliances.
TRIPLE PACK VALUE - Get 3 modules in one set—perfect for multi-room or multi-device smart setups.
SEAMLESS AC POWER CONTROL - Effortlessly dim lights, fans, pumps & more with up to 240V/8A capacity.
PRECISION ZERO CROSS DETECTION - Smooth dimming via direct zero-crossing detection for flicker-free ambiance.
UNIVERSAL MICROCONTROLLER COMPATIBILITY - Plug & play with Arduino, Raspberry Pi, STM, ARM & AVR boards at 3.3V/5V logic levels.

This 3-piece AC PWM dimmer set offers professional-grade 240V/8A power control with zero-cross detection, compatible with popular microcontrollers like Arduino and Raspberry Pi. Ideal for smart home lighting, motor speed control, and automation projects, it supports both 3.3V and 5V logic levels, ensuring seamless integration and flicker-free dimming across multiple devices.

Specifications

ASIN	B0893K6ZPK
Additional Features	Motion sensor
Aspect Ratio	16:9
Best Sellers Rank	#3,298 in Single Board Computers (Computers & Accessories)
Brand	IOT DynRobot
Built-In Media	Dimmer
CPU Model Number	ATMEGA32A
Cache Memory Installed Size	2 MB
Color	White
Compatible Devices	Heater, Lamp, Motor, Pump
Connectivity Technology	USB
Customer Reviews	4.3 4.3 out of 5 stars (14)
Display Resolution Maximum	1920 pixels
Graphics Card Interface	Integrated
Graphics Description	This is the description of the pc graphics
Hard Disk Description	SSD
Hard Disk Interface	Solid State
Hardware Interface	USB
Human-Interface Input	Keyboard
Item Dimensions	2.48 x 1.18 x 1.18 inches
Keyboard Description	Membrane, QWERTY
Keyboard Layout	QWERTY
Manufacturer	ElectronicNuts
Model Name	1ChDimmerHeat2pcs
Model Number	1ChDimmerHeat2pcs
Number of Component Outputs	1
Operating System	Triac
Personal Computer Design Type	Barebone
Processor Brand	Ark Componenet
Processor Series	None
Processor Socket	Socket 7
RAM Type	DIMM
Specific Uses For Product	Home Automation, School Projects, Work Projects
Style Name	Minimalist
Total Usb Ports	1
Unit Count	3 Count
Video Output	VGA, HDMI
Video Output Interface	VGA, HDMI
Video Processor	arm

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Rp1152701

Duties & taxes included

In stock

Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Indonesia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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