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 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.
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 Shenzhen Jinziming Electronic Technology Co.,LTD , https://www.powerchargerusb.com