If you need to use your 3.3V prototype device in 5V voltage systems than the 3.3V-5V Voltage Translator Board is the best solution for you.
The 3.3VReg Board has an on-board regulator that can provide local on-card regulation, thus eliminating the distribution problems associated with single point regulation.
The 5V-3.3V Voltage Translator Board allows you to use a 5V prototype device in 3.3V voltage systems. This board contains a bidirectional voltage translator LVCC3245.
The 5V-3.3VReg Board is an accessory board that includs an on-board regulator. This regulator is used to provide local on-card regulation by reducing voltage from 8-16V AC/DC to 5V or 3.3V DC.
The UNI-REG Board features a Step-Down Voltage Regulator LM2576 that enables voltage to change from 7-23V AC (or 9-32V DC) to 5V, 4V, 3.3V, 2.7V or 1.8V. The board components are clearly marked, which makes the connection easier.
USB Charger Board is a full-featured battery charger with MCP73832...
VOLT is a smart USB Li-Polymer battery charger. It features power management circuitry which can charge the battery over USB connector. Using provided screw terminals VOLT can also be used to power your target device from battery or USB.
The mikroDrive Board features a high-current Darlington arrays ULN2803AN and a jumper for power supply selection. The board provides an interface between a low-level logic circuitry of your prototype board and multiple peripheral power loads.
USB REG Board is a simple and compact solution for powering your prototype device directly from USB. Board provides 5V directly from USB connector, but also features MC33269DT power regulator circut for creating 3.3V reference.