a simple microphone preamplifier

Photocoupler

The microphone preamplifier is a very simple circuit, and almost all low noise op amps will suffice for this circuit (TL071, TL082, OPA371, NE5534, etc.). The circuit will be a dynamic microphone, an electret microphone (or a condenser microphone inside the active circuit).

a simple microphone preamplifier



A condenser microphone (without bias source) will not work with this circuit. If you want to use it, you can add a small resistance capacitor of about 10kΩ to the C1. To do this, simply connect the microphone (VCC - Resitor Microphone) series resistors and click on the microphone and resistor to connect to the output at the junction between C1.

150w Car Power Inverter

1. This product is used to convert the car power supply of mobile phone chargers

2. This product has over-current short-circuit overload protection

3. Insert this product into the cigarette lighter socket of the car

4. Confirm whether the power indicator light of this product is on

5. Insert the mobile phone charger into the socket of this product

6. This product is used in mobile phones, PHS, mobile phone line chargers, travel chargers, universal chargers, etc.

150w Car Inverter, 150W Power Inverter, Car Charger Inverter with USB

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