HiLetgo Relay Module on KiCad

[juhstinh]

Hi,

I am new to KiCad and am very new to PCB designing.

For my project, I need two relay modules in the circuit but I was wondering if yall can help me with the schematic for this piece specifically. http://www.hiletgo.com/ProductDetail/1958543.html

I see lots of schematics for other circuits but they aren’t quite similar. The circuitry for my project is quite simple as it is one Arduino Uno R3 connected to two relay modules. I will attach the circuit below, keep in mind its just a sketch and not the final product, the arduino on the left and relay module on the right.

Please help, any feedback is helpful thank you. 

[stryker]

Hi @juhstinh and welcome

Since the module is a black box that you won't be changing, I would tend to treat it like you have with the Arduino in the schematic and not include the internal workings. Therefore my design would end with naming the connections to J1 & J4 only with a descriptive KiCad global label for each bus/wire.

If there will be other components connected on the output side of the HiLetgo module to be included in this schematic then I'd create a custom footprint for the module, similar to the Arduino footprint, with connections defined and a box without the inner components.  That's actually surprisingly easy to do.

If this was the kind of module that might be a daughter-board to a PCB you're making, this new custom footprint might also have a silk outline for the PCB, especially if it has components on the underside which prevent the space underneath being populated by other tall components.

I hope that's helpful.

Cheers, Geoff

[juhstinh]

Hi Geoff,

Thank you very much for your thoughtful input, I was just thinking the same solution last night but with your ideas in consideration made it easier to continue on what to do.

Have a great day!