Plank's Constant by LED

Plank's Constant by LED

Specification of  Plank's Constant by LED:

• 0-5V DC at 2mA, continuously variable IC regulated.
• short circuit protected power supply with 1K ten.
• potentiometer for fine voltage control.
• Digital panel meter 3 digit 20 Volt DC.
• Digital panel meter 3 digit 2000mA DC.
• For different colour LED'S (Red, Yellow, Blue, Green)
• Mains ON/OFF switch & Fuse.
• operative on 230V 10% at 50Hz AC.