Color:20pcs 5*7 Single Sided PCB Board AiTrip Paper Composite PCB Boards - 20PCS 5x7cm Specification Material: Bakelite Board Technic: Single-sided Size: 5x7cm Package: 20 x Paper Composite PCB Boards Using： First of all, in the omnipotence board, so that your next work will be very easy, it is better to arrange the layout according to the function module, a key link on the universal board link a line, but can be connected in the adjacent management, and then connect the adjacent pipes with tin, and the distance comparison of the wire, you can use lacquer to wrap the line. If it's short, direct solder can be done without wires. When the conductor crossover, you can only use that enameled wire
A**L
BROKEN TARNISHED & WARPED - WORTHLESS
The edges of these boards are ragged, jagged, chipped, or falling apart.Parts of the board appear BURNT???The metal is tarnished, or near non-existant. I would not trust its conductivity at all.The white markings are full of gaps where the ink rubbed off or never adhered to the surface properly in the first place.Some surfaces seem simply dirty - not just scuffed but actually with dirt on them.Were these thrown, decades ago, into a junk drawer in a mildewy sub-basement where they've been periodically gnawed upon by rats while growing more and more decrepit until being unearthed and sold on Amazon?? Completely worthless.
J**R
They work but are rather thin
I needed some larger proto boards for some testing I was doing. This looked like a great deal for what you get for the money. And it was. However, the board material is thinner than the usual 060 mil/1.6mm but still reasonably rigid. I can't remember now if it was 040 or 050. They other two things to note are 1) there isn't any solder mask so it is easier to bridge pads when soldering (but again, quite usable) and 2) the pads are bare copper so they may need to be cleaned before soldering with something like very fine steel wool or Scotchbright. The board are all reasonable flat with a minimal bowing even for the larger ones.
M**N
They will do
Now as a person who needs these quickly for a project in class they will do. Some boards have cracks. Nothing is burned. Honestly looks like wherever they were kept was just too cold for the boards. Little bit of white residue on the copper of them too. No green corrosion. Dependent on the size the thickness varies between the boards. They are your typical Prototype board. No more no less. They will get the job done.
C**S
Great
this are very nice boards.
S**.
China junk
China junk
G**P
poor quality, smells horrible
Cheap feeling. Very thin. And most problematic is they stink. Smells like burnt electrical components. I'm sure they are gassing off something toxic. I wish I didn't buy these now.
G**S
Great assortment
I'm happy with the quantity and assortment of board sizes. They work just fine for my purposes.
P**E
On time
Good