Review on RioRand 5 Pack Boost Converter Module: XL6009 DC 3.0-30 V to DC 5-35 V, Adjustable Output Voltage, Step up Circuit Board - 4A by Eric Froedge

The only criticism I have of them is that the power holes are an untypically 0.1" spacing, so you can't mount them straight to standard. breadboard or punch card. However, you can tilt the pins a bit and it works. Unfortunately as the holes are on the full outside edges you can't use terminal blocks, you will either have to solder the wires or the pins. I chose the pins to be slightly angled so I could attach them to the perforated board underneath and that way I could attach the terminal blocks with Fasten the copper tracks to the perforated plate. , and doesn't seem to change after the commit. Build quality appears to be good and I don't notice any cold solder joints or other issues that you find on lower quality products. of 5 so I can use them for multiple projects.