Features:

• Dimmer Board for selecting any voltage between 0 VAC - 120 VAC or 0 VAC - 240 VAC
• Zero-Cross detection
• Programmable Atmel ATtiny85 via 6-pin ICSP header
• Compatible with any Arduino!
• Can be controlled using voltage signal [ 0.55V - 2.77V ] (3.3V/5V tolerant) or by using PWM signal
• Available for 50Hz or 60Hz (But can be reprogrammed using ICSP header).
• Both 120V or 240V input compatibility
• LED 'AC ON' indicator
• 4-Corner Mounting Holes

NEW Triac rated for:

• Peak Non Rep Surge Current Itsm 50Hz: 140A
• Peak Repetitive Off-State Voltage, Vdrm: 600V
• On State RMS Current IT(rms): 16A

Controls the amount of dimming based on input voltage on the CTRL pin or a PWM signal on the pin between '+' and '-' You can select the input mode (CTRL voltage input or PWM signal input) by making the Mode Pin (under '+') LOW or HIGH, respectively.

Voltage Mode:
Voltage         Amount of Dimming
0 - 0.65V:      100% Dim (Fully OFF)
0.65V - 2.65V:  100% - 0% Dim (Based on 'CTRL' Voltage)
2.65V - 5V:     0% Dim (Fully ON)

Note: In voltage mode for Normally OFF some applications require a resistor (tested with 65K) between CTRL and Ground, while directly powering from an Arduino does not.

PWM Mode:
Duty Cycle          Amount of Dimming               Arduino Code
0 - 5%              100% Dim (Fully OFF)            analogWrite(0) to analogWrite(15)
5%-40%:             100% - 0% Dim                   analogWrite(15) to analogWrite(90)
                    (^^Based on 'PWM' Duty Cycle^^)
Greater than 40%:   0% Dim (Fully ON)               analogWrite(90) to analogWrite(255)

5V connects to '+' pin on the ICSP header (marked on PCB) Ground connects to '-' on the ICSP header (marked on PCB)

Example uses: Control the speed of a fan, drill, motor, etc. Dim lights. Control temperature using a heater. Chicken coops, brewing beer, maintaining a set-point using Alernating Current, etc.

While high voltage systems are interesting experimentally, they can be dangerous, and if not treated with care, respect and intelligence, they can result in a fatal injury.

I will program for 60Hz if ordered in North America. For all other continents I will program for 50Hz unless you specify otherwise. (It can, however, be reprogrammed)