Hi

Apologies if I get the words wrong

Bought 2 pcb loRa boards with a view to start basic testing. But realized I they are on 1.5cm board with 8 holes so assuming 1.27mm pitch?

Even with my poor eyesight I can probably solder these but wonder what people buy for this. Ideally want to connect to breadboard wires.

What do I google for for then other end. Guessing pin header. Links to something would be useful.

Thanks all.

 

Hi

Apologies if I get the words wrong

Bought 2 pcb loRa boards with a view to start basic testing. But realized I they are on 1.5cm board with 8 holes so assuming 1.27mm pitch?

Even with my poor eyesight I can probably solder these but wonder what people buy for this. Ideally want to connect to breadboard wires.

What do I google for for then other end. Guessing pin header. Links to something would be useful.

Thanks all.

Could you provide a link to the board?

 

If the spacing is .050”, then I would suggest getting an 8 pin wire to board male to solder to the board, and a prepared pigtail for the female, then crimp DuPont pins on the wires to make a finished board to protoboard cable. You can choose male or female DuPont termination depending on the application.

An example of a connector where you can find a pigtail pre-made is the Molex Picoblade series in an 8 pin version. You can find terminated pigtails for the on AliExpress and the like. This arrangement allows you to use the module in with the protoboard while easily moving to a project—and back as needed.

There are pin headers in .050” but they have no compatibility with “DuPont wires”. They are really useful, though for things where you need a UART or JTAG connection but don‘t have a lot of space, or as board to board connectors for stacking.

 

Here we go,

This is what I bought
https://www.aliexpress.com/item/1005002603901624.html

I am after just something to use "DuPont wires" and a breadboard or a suggested alternative. Not building anything real just want to play around.

I do think it is this one https://www.amazon.ae/Lubeby-Smart-Original-915Mhz-Transceiver/dp/B0BHLK9FC9

I have measured and it does seem more 16mm than 15mm to me.

Looked at the molex but cannot see how it would work probably because I am an idiot. I t looked like it would not fit with the pin holes I have.

Thanks for replying.

 

OK, I now that I see the module I have a better idea of what is going on.

Assuming (since I can’t really measure it), these are 1.27mm pitch as they appear to be I don’t have the most satisfactory solution for you. I was trying to avoid you having to buy a crimping tool and crimp the vey fiddly 1.27mm pins, but here’s what got, two options…

Option 1—female headers on the board, then soldering ordinary DuPont wires to pins on a male header. This has the advantage of avoiding soldering to the board which could end poorly. Soldering the solid, 8 pin 1.27mm header would be much less difficult or risky then 8 (or 16) wambly wires.

Option 2—design an adapter board and have it fabricated. This might sound hard, but in fact given the castellated pads (the wavy edges) you would avoid connectors on the modules. You could make the boards just a little bigger than the modules, and use long 2.54mm male pin headers. This would allow plugging the module into a breadboard or using female DuPont wires—or both.

Someplace like JCLPCB, with their free design tool EasyEDA and large parts inventory would be fine, and the very simple nature of the board you need would make the learning curve much shallower if still a little steep.

 

Option 1 sounds feasible to me.

May look a option 2 for my ESP32 parking project with hr-sr04. Wifey would be happy for something real to come out of this hobby.

Thanks fir help and patience. Knowing you are buying the right bit makes it a lot easier.

 

Option 1 sounds feasible to me.

May look a option 2 for my ESP32 parking project with hr-sr04. Wifey would be happy for something real to come out of this hobby.

Thanks fir help and patience. Knowing you are buying the right bit makes it a lot easier.

There is still a bit of ambiguity. It certainly seems that 1.27mm is right, but…

Oh, get yourself some silicone insulated DuPont wires to make this up. They are far superior and importantly, they don‘t suffer from melt back of the insulation. Strip the wires to the right length to match the pin, and tin them. Solder them parallel to the pins, and use some small heatshrink tube to insulate and provide strain relief.

If you aren’t already using 63Sn/37Pb alloy solder (63/37, not 60/40) get some now. Set your iron to about 335°C, and keep the tip very clean. Better to use a bronze wool tip cleaner than a sponge and water. What? You don’t have a temperature controlled iron?! Get one! A very cheap and cheerful entry level iron, that has the advantage of retaining it’s utility is the Pinecil.

The Pinecil will operate from any compliant USB PD power supply that can do 12V@3A, including battery-based ones. (very convenient). I bought this silicone insulated cable for it, with the blue color being the only one available at this time. I was a little disappointed wanting the black one—but then it turned out to match the blue sleeve on the iron.