Aideepen | DC12V-15V VU Meter Driver Board TA7138 Audio Level Power Meter Drive Module LC Filter Overload Protection for Car Audio Amplifie

Features:1. Utilizes the classic level meter drive principle, balancing dynamic response with indication accuracy, resulting in natural and smooth needle movement.2. Single-power-supply design eliminates the need for a separate transformer, making upgrades more convenient.3. The input features an LC filter circuit that effectively suppresses high-frequency interference, making it suitable for in-vehicle and switching power supply environments.4. Integrates soft-start, backlight brightness adjustment, and needle overload protection functions to extend the meter’s service life.5. Suitable for applications such as level meters, VU meters, small amplifier power meters, and audio systems.Product Description:This VU meter driver board is designed based on the classic TA7138 peak level meter drive principle, combining the high compression ratio characteristics of the TA7318 with pointer acceleration functionality to deliver sensitive dynamic response and accurate readings. It supports single-supply power, eliminating the need for a separate power supply, and is compatible with the BA6138 mounting dimensions for easier upgrades. It features an onboard LC filter circuit, reverse polarity protection, and adjustable overload protection, making it suitable for complex environments such as car audio systems and switching power supplies. Newly added backlight brightness adjustment and soft-start functions effectively extend the lifespan of the meter bulb. Utilizing 0.5W metal-film resistors, it ensures stable and reliable long-term operation, making it an ideal choice for building VU meters, level meters, and small amplifier power meters. It ensures long-term, continuous, reliable, and stable operation. Its resistance stability also outperforms surface-mount resistors, carbon-film resistors, and oxide-film resistors.Product Specifications:Power Supply Requirements: DC 12V–15V, current 0.2A or higher.Input Sensitivity: When a 1000mV 1000Hz sine wave signal is applied, the 39 meter needle points to the +1dB position.PCB Dimensions: 63 mm × 52 mmMounting Hole Spacing: 46 × 55 mmBacklight Power Terminal: Outputs an adjustable DC voltage of 0–10 V. Used to power small bulbs or LED backlights.Note: The supply voltage must strictly be maintained between 12V and 15V DC. Although the module may operate briefly at voltages exceeding 15V DC, prolonged operation at such voltages will burn out the protection circuit.Wiring must be performed with the power disconnected. Damage caused by working on live circuits is considered a user error and is not covered by the warranty.Product List:1x Module