ElectroCookie pcb prototype vorstand doppelständer solderable brotschneidebrett für arduino und diy elektronische projekte, vergoldet (3-pack, mattschwarz)

The layout of the prototyping board has a really critical mistake. The pattern on the left side of the board is not on the same .100 centers as the pattern on the right side of the board. There is a 0.050 offset between the two sides.With some more careful measuring, it looks like the problem is that the power busses are not lined up on 0.100 centers from the component areas.My intended purpose for this board was to place a wide ESP32 Dev module across the two sides, straddling the center. This is NOT possible with the way the board is laid out. Very disappointing.

Board is nice, the traces are clean and not oxidized.

There are some applications where you're going for a small space, and a single half-breadboard won't cut it. For example, using eInk displays, they come with a connector on one side (that unfortunately faces OUT), or a column of pins on the other side.So putting in a header in the column of pins is easy, but (Murphy's law being in full force) the order of the pins is NEVER the order that you need to connect to an ESP32 module or something similar. These breadboards are perfect for that....put the SoC module in the right-hand breadboard, the display header in the left-hand breadboard, and then let jumper wires do the unscrambling to get the right signals to the correct pins. A perfect robust low-height solution, and not as clunky as having to solder wires from a connector into a rats-nest on a single breadboard.Wish they were a little cheaper, but I've literally never seen this anywhere else, so I guess Supply/Demand is not in our favor. That said, they are very well made, and I love the black color.

The quality and layout of these boards is really good, with an excellent very flexible layout, well plated-through holes, good sized solder pad areas on both sides of the board for each hole and very low resistance (0.02 - 0.03 ohms) for the longest running conductor.As others have noted, you need to be wary that each of the V+ and V- lines are split into three, so if you want power distribution across both the left and right sides of the board you'll need to solder some jumpers in to link the three parts of each power bus together, but at least this design allows for multiple power buses to be used in one project, which I've already made use of :-)Something which is a bit odd is that the silk-screen column lettering, which goes from A to J on each the left and halves of the board are not then implemented the same on the rear side of the board. On the back face (where the conductive strips run), the columns are also lettered from A to J, but they really ought to be lettered from J to A. This means that if you are working on both sides of the board, a component that you poke through hole D13 on one side of the board appears out of hole G13 on the other side of the board, which can be really confusing!There is also one slight issue with the boards which probably won't affect most people, but it has afected me, so I'll highlight it here in case it might impact someone else's project; the spacing between the rows of conductors on the right side of the board and those on the left is not compatible with the standard spacing of a large DIL IC or circuit such as an ESP32 board when it is positioned straddling the space between the left and right sides of the board, meaning that either the chip / board's pins need to be spread and bent a little before they are soldered into the board, or any row of header sockets that you might want to plug your chip / board into needing to be soldered onto the board at a slight angle in order to allow the device's pins (which will also need spreading a bit) to be inserted, which is not very good for keeping said device in place over time :-( I don't see why the two sets of rows of conductors couldn't have been pushed slightly closer together, although maybe that will affect some other use case which I haven't come across as yet :-)I've included a picture of my current project, excluding the various modules that will be plugged into it, showing how much can be squeezed onto these compact little boards :-)Anyway, apart from the couple of oddities mentioned above, these are a great board and I'd recommend them for just about any project!

Chose this one for its shape as double breadboard.PCB quality is awesome and it totally does the job for parts that are too wide for a single breadboard.Very happy with the product.