ESP8266 WiFi RGBWW LED Dimmer v1.5

Custom Hardware board for controlling 5 Led Channels via PWM (RGB + Warm/Cold White). It is designed for max current ~4.5A per Channel.

Changelog

• 1.5 (31.01.2017)

  • DCDC wandler has been remeasured and provided for through hole mounting on pin headers
  • Jumper introduced for allowing for external 3,3V connections
  • measurements have been changed to 53mm*47mm with mounting holes tailored towards "Strapubox CO 4" casing
  • C1 has been replaced with a smaller form factor

• 1.3 (20.02.2016)

  • added another tact switch which can be used during boot to reset settings
  • silksceen naming updated

• 1.2 (16.02.2016)

  • improved the layout for better EMV
  • added buffer capacitor for dc converter
  • added filter capacitor close to ESP8266

• 1.1 (01.02.2016)

  • connected ADC
  • some layout improvements

Parts

• 1x ESP8266, ESP-12 format
• 1x XM1584 Power converter (set to 3.3v!)
• 5x IRLZ44N Mosfet (logic level gate threshold)
• 11x 10k resistors, 0805 (R1 - R11)
• 1x 1k resistors, 0805 (R12)
• 1x 330 µF Elko RM 2.5 mm (C1)
• 1x 100 µF Elko RM 2.5 mm (C3)
• 1x 100 nF capacitor 0805(C2)
• 3x 5,08mm 2pin terminal block
• 1x 5,08mm 3pin terminal block
• 1x 2,54mm 4pin header
• 2x Micro SMD Tact Switch 2 pin 362.5 mm (optional)

Assembly

Assembly of the PCB Board is straight forward, solder all parts to the PCB.

Caution : before soldering the esp module to the PCB, set the output voltage of XM1584 converter to 3.3v

Recommended steps

• Start with soldering the smd resistors
• Ensure the output voltage of XM1584 converter is 3.3v before continuing.
• Solder the XM1584 Power Board
• Solder ESP8266 Module
• Optional: solder SMD Tact Switch
• Solder Elkos
• Solder Terminal Blocks, 4pin header
• Solder FETs

Firmware

Firmware is still work in progress.

Latest can be found here: https://github.com/patrickjahns/esp_rgbww_controller_fw

Modifying

The schematic and board files are compatible with eagle 7.2+

Ideas

Here are some ideas for future revisions

• see if we can clear some GPIOs and provide them via PIN Header for other enhancements (i.e. IR / Rotary Controller)
• change layout for VCC/GND to be on the left side
• connect ADC to detect power failure

Resources

• ESP RGB Project
• H801 Wifi Controller Hack

Thread in Fhem Forum

• Entwicklung/Sammelbestellung RGBWW Wifi Led Controller

Credits

Thanks to RiRomain for his excellent documentated ESP RGB Project