POFET High-Precision Panel VU Meter Backlight Power Amplifier Audio DB Level Header

• Premium quality, cute appearance
• Lamp: White LED x1pcs, 10~20mA (Original design has no resistor inside, so need extra one to work)
• Stable and reliable performance, Display high precision and with backlight.
• Also need external resistor, diode, capacitor
• Note: On the center 2 pins are for meter coil, other 2 pins are for LED

Features: Premium quality, cute appearance, stable and reliable performance, high precision display and backlight. Reference TR-35 Professional, high-end dB: -20 ~ + 5 dB. 0dB = 1.288V +/- 10%, calibrated DCR = 650Ω, If = 450uA Lamp: White LED x1pcs, 10~20mA (the original design has no resistance inside, so need an extra one to operate) LED Lamp Voltage: 2.2~2.6V So you need the additional resistor: 270Ω 1/4W, if VDC = 5V. 390Ω 1/4W, if VAC / DC = 6.3 V. 1000Ω 1/2W, if VAC/DC = 12.6V. Also need external resistor, diode, capacitor (if 1Khz 0dB = 1.288Vrms, R1 = 470Ω, VR1 = 100Ω, or R1 + VR1 = 500Ω) Size: Dimensions: 35 x 35 x 38 mm, W x H x D. View Size: φ34.0mm Hole/mounting pitch: φ3.5 mm/28 x 28 mm. Note: In the center, 2 pins are for the meter coil, the other 2 pins are for LEDDIY Supplies: Electric Specification: 1 x DB Level VU Meter