2.1mm barrel power jack socket. For connecting barrels, I mean "power leads"!
Holder for single AAA size battery. 1.95" long x 0.50" x 0.50" high. Unbreakable black plastic. 6" wire leads.
It's a nice 5-AA battery holder, with 5" leads and a 2.1mm DC barrel plug.
Need to add more voltage to your regular 4AA battery pack? Parallax has come up with this ingenious plug in module that adds a 5th module to your AA quad-pack holder.
These are very slim, extremely light weight batteries based on the new Polymer Lithium Ion chemistry.
Switchable Voltage Divider is a voltage divider with switches. The switches can be used to control which resistors are used in the voltage divider.
The Dimension Engineering 3.3V switching regulator is a tight & tidy voltage regulator that offers great performance at an excellent price. Great for extending battery life!