Specifications:
Model: TR-35
Material: plastic + electronic components
Size: 3.7 * 3.5 * 3.5cm/1.46*1.38*1.38"
Decibel: - 20 ~ + 5dB
0dB = 1.288v + / - 10%, calibrated
DCR =650??,If = 450uA
Bulb: white LED x 1pcs, 10-20ma (there is no resistance in the original design, so an additional one is needed to work)
Led voltage: 2.2-2.6v
Therefore, if VDC = 5V, additional resistance is required: 270 ?? 1 / 4W
390 ?? 1 / 4W if VAC / DC = 6.3V
If VAC / DC = 12.6V, 1000 ?? 1 / 2W
We also need external resistors, diodes, capacitors
(if 1kHz 0dB = 1.288vrms, R1 = 470 ??, VR1 = 100 ?? or R1 + VR1 = 500 ??)
Size: 35.0x 35.0x38.0mm, W x H x D
Viewing size: 34.0mm
Installation hole / spacing: 3.5mm/28.0x28.0mm
Note: the middle 2 pins are for the instrument coil and the other 2 pins are for the LED
Purpose: audio volume meter is used to measure the amplitude and vibration frequency of sound, and it is mostly used in audio power amplifier and other equipment
Notes:
1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
2. Please allow 1-3cm measuring deviation due to manual measurement.
?
Model: TR-35
Material: plastic + electronic components
Size: 3.7 * 3.5 * 3.5cm/1.46*1.38*1.38"
Decibel: - 20 ~ + 5dB
0dB = 1.288v + / - 10%, calibrated
DCR =650??,If = 450uA
Bulb: white LED x 1pcs, 10-20ma (there is no resistance in the original design, so an additional one is needed to work)
Led voltage: 2.2-2.6v
Therefore, if VDC = 5V, additional resistance is required: 270 ?? 1 / 4W
390 ?? 1 / 4W if VAC / DC = 6.3V
If VAC / DC = 12.6V, 1000 ?? 1 / 2W
We also need external resistors, diodes, capacitors
(if 1kHz 0dB = 1.288vrms, R1 = 470 ??, VR1 = 100 ?? or R1 + VR1 = 500 ??)
Size: 35.0x 35.0x38.0mm, W x H x D
Viewing size: 34.0mm
Installation hole / spacing: 3.5mm/28.0x28.0mm
Note: the middle 2 pins are for the instrument coil and the other 2 pins are for the LED
Purpose: audio volume meter is used to measure the amplitude and vibration frequency of sound, and it is mostly used in audio power amplifier and other equipment
Notes:
1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
2. Please allow 1-3cm measuring deviation due to manual measurement.
?
1 X Audio Volume Meter?
        
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