2 Channel in wall AC dimmer

Disclaimer

Using this project is at own risc The dimmer is not tested in accordance with EMC or safety regulations.

Description

This project is a 2 channel AC dimmer, that is built to fit in in wall boxes.

Features

• 2 channels/dimmers (300W/dimmer)
• Small size 56 mm diameter by 23 mm height
• Button or wireless control
• Surge protection
• Overheat protection
• Restore default values and reset Sensor address

Function

The dimmer can be controlled by either a wireless home automation system or from buttons. The dimmer will when going from on to off state dim from 0 to preset dim level. When the dimmer goes from on to off it will dim down from used dim level to 0.

From wireless control

From the wireless control it is possible to set

• Dim level of ch1 or ch2
• On/Off of ch1 or ch2

From buttons

There is one button for each channel. From the button it is possible to control the dim level as well as turn on or off the dimmer

• 1 click ON/OFF
• 2 click set new dim level (only when dimmer is on), then 1 click to activate new level

Work in progress

The first revision of the board is partially tested

Hardware rev A:

• AC to 36 V DC - Tested OK
• power consumption measurement function - Not tested
• 36 V DC to 5 V DC - Tested OK
• Triac function - Tested OK
• Buttons - Tested OK
• MySensors radio function - Tested OK
• AC zero crossing function - Tested OK
• Signing - Not tested

Software:

• Load bootloader - Tested OK (soldering required to do this as ISP connector is missing)
• Load Software - Tested OK

Software function:

• All functions to run the dimmer is developed and tested except
• Signing
• power measurement
• some work is still needed on the duty cycle of the dimmer so that it turns of completely to 0 V when in off state.
• The .ino file in download is a prototype

Next revision:

• Added ISP connector
• changed to SMD NRF module