Quantity   Component name
1 × LM317 Power Management ICs / Linear Voltage Regulators and LDOs
1 × Potentiometer, 2k ohms, linear, mono
1 × Optional: Voltmeter, 0-9.9V Or just use your multimeter
1 × Clip/header socket for holding the LED
1 × Resistor 300-330 ohms, 1/4W Just something to limit the current on the power on LED
1 × LED, any suitable one for power on indication (needed for the LM317 to give lower than 3 mA of current) Low intensity LED is best suited
1 × One of each: Ammeter & Voltmeter, High Accuracy from eBay seller elite.element http://stores.ebay.com/Elite-element/_i.html?_nkw=accuracy&submit=Search&_sid=897140872
1 × Resistor, 40-60 ohms, 1/4W Lower resistance gives higher max amperage. 47 ohms gives ~27 mA.
1 × Battery holder, 9V
1 × Battery, 9V
1 × Optional: Amperemeter, 0-25 mA Or just use your multimeter