This unit is great for wiring up 3 AA batteries in series.
A small, but mighty power supply. This board was designed to be as small and inconspicuous as possible.
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.
Switchable Voltage Divider is a voltage divider with switches. The switches can be used to control which resistors are used in the voltage divider.