The BooSTick project we recently found on the Kickstarter site is the sort of thing we like to think up in the Elektor Labs. This time someone else beat us to it. This handy little board converts the voltage from a single penlight cell into a regulated 3.3 V or 5 V supply voltage for use on a breadboard.
The BooSTick is dimensioned to precisely match the width of a standard breadboard. Its pins fit into the outside terminal strips of the breadboard, which are normally used as the supply rails on the breadboard.
The output voltage can be set to 3.3 V or 5 V with a jumper, and the maximum output current is 300 mA or 200 mA, respectively. You can also connect two boards in parallel for more output current. The BooSTicks are priced at $12 each for the Kickstarter campaign, and the target amount has already been oversubscribed by a good margin.