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Detail about LM386 Adjustable Audio Amplifier Module
Linear audio amplifier designed around the LM386 IC with Gain set at 200. Adjustable resistor for Input level control. Capacitor coupled Output. Perfect for boosting weak signals from audio sources, microphones, DC/AC sensors, etc.
The LM386 Audio Amplifier Module is a mono audio amplifier based on the LM386 chip. On eBay, it goes by various names and descriptions such as “LM386 Audio Amplifier Module 200 Times 5V-12V Input 10K Adjustable Resistance”.
The LM386M chip is available in a SO package (M) manufactured by Texas Instruments, and operates on a voltage range between 4 V and 12 V. It has an absolute maximum rating of 15 V. Package (M) has a dissipation rating of 0.73 W.
The LM386M version of the chip will provide a typical output of 325 mW, when the supply voltage is 6 V and the speaker load 8 Ω. A 9 V battery power supply will provide an output of around 500 mW.
Specifications
- Signal Gain 200 (multiplier)
- Operating voltage 5 V to 12 V DC
- On-board LED for power indicator
- Volume Control 10 k Ω preset
- Screw Terminal for speaker output connection
- Board size Approx. 41 mm × 13 mm
- Current: <10mA @ VCC = 5VDC
- Input Signal Range: 0-0.4V
- OutputRange P/P : ~ 80% of Vcc
- 4 Pin .1in Pitch Header for Power & Input
- Output Terminal Strip
- LED for Power indication.
Pin connection
- GND: Ground
- VCC: Voltage supply (5:12V)
- IN: Audio signal
- Terminal: Speaker