These prototyping boards have two power rails down the middle, and two rails along the outer edge, and a pair of mounting holes on either end. On either side of the power rails are holes in a typical "breadboard" pattern for easy use with parts in DIP packages, while either end has holes grouped in a pattern at right angles to the power rails - these holes are ideal for wiring connections to external devices (for example, the serial programming header on a standalone arduino). The mounting holes are on a breakaway tab, so either or both pair of mounting holes can be removed.

These are great for projects too small to justify using one of my larger prototyping boards, and are ideal for accomodating an IC in DIP package and thier supporting components - for example making standalone Arduino or ATTiny projects (though I also sell prototyping boards designed specifically for the ATTiny84 and ATTiny85), or more mundane tasks using 555's, comparators, or level shifters.

All boards are made on high quality 1.6mm FR-4 with solder mask on both sides, and HASL surface treatment - just like all our other boards. Many manufacturers of prototyping board use the brittle low quality brown phenolic PCB material, and/or leave the copper exposed, inevitably leading to corrosion and degradation in solderability over time. We wouldn't settle for such inferior prototyping board in our own projects, and you shouldn't either!

These are available in four sizes:

1.2" x 3.6" (DIP-40 - great for making standalone Atmega 1284p) 1.2" x 3.1" after removing mounting tabs

1" x 2.7" (DIP-28 - great for making standalone Arduino, ATTiny861 or ATTiny4313) 1" x 2.2" after removing mounting tabs

1" x 2.0" (DIP-16 - great for ATTiny84 projects or use with standalone IC's) 1" x 1.5" after removing mounting tabs

~2.5 x 2.0" (2.0" x 2.0" after removing mounting tabs)~ This has been discontinued. The shape and the pricing formula of my board house made it cost as much as a 2" x 4" board. The initial run only worked because I was able to make a "poor man's (19cm square) panel with other designs. I later realized that if I avoided doing that (which I have been except for sticking items not planned for sale into unused board space, as a way to save money on prototypes that don't see the light of day in the store)

Check out my other prototyping boards:

Larger 2" x 4" boards

Protoboard sized to fit an empty "Altoids" tin

2" x 4" ESP8266 protoboard

Small pieces of prototyping board

Prototyping breakout boards for uncommon SMD footprints