Involvement:Expert (understands the inner workings) - Ownership:more than 1 month
Compact yet large enough for useful test circuits for small projects. These are quite well constructed and unlike some others I've had the holes line up fine with the contacts underneath. You can lock multiple units together for larger projects and there's adhesive on the back if you want to mount them on a board that way.
They have a standard size & spacing with two power rails on each side unlike some smaller/cheaper types. The power rails on the sides have a split half way so you can choose to run 2 different voltages in your circuit if needed (or remember to bridge them together if not !)
None that I've found
Worth buying a few since these are so useful, they lock together, and the price is right.
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