This module uses G6L-1P relays - and its design is inspired by Everlanders Automation projects (video) (Project Home page), where a Wemos D1 mini wireless remote control option is added to the MaxxFan in the Everlander rig.

In the Everlander project G6L-1P relays are used, so this PCB also uses G6L-1P relays.

• Here is a similar PCB design, but it uses G6K-2P relays
• Here is a general PCB design, that can hold up to 8 mini relays

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

Here are some screen shots:

• TOP side
• 

• Bottom Side
• 

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 Sprint-layout Viewer program
• The PCB design file (Status is: PCB UN-tested)

Chips:

Miniature relay G6L-1P

Datasheet: omron_g6l-1-relay.pdf

ULN2803a Darlington Transistor Array

(Top View)

Datasheet: uln2803a.pdf