This is a bundle of two 204-0045-01 adapter PCBs and the 920-0031-01 solderless breadboard. Each PCB is a QFP/QFN-to-DIP adapter with a twist. These have the patented Schmartboard|ez technology to make soldering surface-mount devices easy. Your SMT part will sit in grooves that hold it in place and already have solder in them. So all you need to do is put a chip in the grooves, apply flux, and use a small enough soldering tip. Each of these adapters supports a 44-pin QFP or QFN chip with 0.5mm pitch (7×7mm body). The board also includes room for 0805 SMT discrete components (e.g. a bypass capacitor), and pads for easy access to ground. Also, a large plated hole in the center of the device area allows for the addition of solder to utilize ground pads on the bottom of a device. Two strips of 40 male pin headers are included. These do not provide enough pins to use both boards! Be sure to order an additional strip of pin headers using the option box at the bottom of this page. The strips then can be snapped apart to create the individual 22-pin segments needed to complete the 44-pin DIP package, and the 2-pin segments for the 0805 component headers.  The Bred Blox solderless breadboard has 830 tie points (126 five-point terminals plus four horizontal bus lines of 50 test points each for easy connections to common lines). The board has interlocking features so that you can connect multiple Bred Blox together to make a larger prototyping area.
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