====== Wireless Module  for MaxxFan  (G6K-2P relays) ====== 

This module uses G6K-2**P** relays - and its design is inspired by [[https://www.youtube.com/watch?v=aS3BiYaEfiw&ab_channel=Everlanders|Everlanders Automation projects (video)]] ([[https://everlanders.com/2020/04/06/automation-arduino-and-blynk/|Project Home page]]), where a Wemos D1 min wireless remote control option is added to the MaxxFan in the Everlander rig. 

In their project G6L-1P relays are used, but they seem to be more expensive than G6K-2P relays, so this PCB is designed for G6K-2P 5V relays. 

(See this [[esp8266-d1-mini-maxxfan-b|MaxxFan Module B page]] if you want to use G6L-1P relays).


**Project Status:** PCB design verify (rev.A1 - 2023 May 16)


Here are some screen shots: 

   * TOP side
   * {{:wemos-d1-mini-esp8266:maxfan-module-a-top.jpg?400|}}

   * Bottom Side
   * {{:wemos-d1-mini-esp8266:maxfan-module-a-bot.jpg?400|}}



//Notes about un-knowns://   
  
   * I do not know if the numbering (1-8) is similar to the actual MaxxFan. This needs verification.

Use the PCB viewer if you would like to see/test the entire copper path as it switches sides and/or connects to several solder points. 
   * Link to Free download of the [[https://www.electronic-software-shop.com/lng/en/support/free-viewer-software/?language=en|Sprint-layout Viewer program]]
   * {{:wemos-d1-mini-esp8266:relay-module-a.zip|The PCB design file}} (Status is: PCB UN-tested)

**Chips:**

//Miniature relay G6K-2P// 

{{:wemos-d1-mini-esp8266:g6k-2p.jpg|}}

Datasheet: {{ :wemos-d1-mini-esp8266:omron_g6k-2-relay.pdf |}}

//ULN2803a Darlington Transistor Array//

(Top View)

{{:wemos-d1-mini-esp8266:uln2803.jpg?200|}}

Datasheet: {{ :wemos-d1-mini-esp8266:uln2803a.pdf |}}