Do you need a variable power supply but don't have the space or budget for the expensive benchtop models? The Ultimate Prototyper's Variable Output Power Supply will provide up to 1.5A of regulated DC current at any voltage between 1.2V to your input voltage (max 12V). Use for field testing of an analog amplifier or just to see how bright that LED shines.
Warning: Due to the bare electrical connections on the power supply, do not use the power supply on a conductive surface or near conductive objects such as metal tools. For protection, it is advised that you cover the assembly in electrical or duct tape to prevent shorts that may cause batteries to overheat. If you notice any component becoming very hot or smoke, remove the batteries immediately and turn the power supply off.