Descriptions:
Preamplifier module with op amp AD828 is a stereo or two-channel preamplifier module based on IC AD828, which works with a voltage of 5 to 15 volts.
One of the capabilities of this module is to adjust the signal amplification factor with resistors R7 and R5 (by default, the amplification is about 5 times.) You can change the amplification factor according to your needs. Resistors can be selected from 5k-47k. The larger the resistors, the greater the amplification. If you are using plug-in resistors, you can remove the resistors from the main board and solder them to the embedded pads on both ends of the chip.
Note: This microphone amplifier board does not have a power supply voltage regulator circuit and can only use a battery or linear power supply and cannot use a switching power supply, otherwise interference will occur. If one channel is always used, the other channel should be shorted to GND to prevent mutual signal interference.
Application:
Switch and sensor for Arduino STM
Electronic module
Computer
Can be used for guitar and other musical instruments
Specifications:
Size: 33mm*25mm
Working voltage: DC 5v-15v
Operating temperature: -40 - +85
Bandwidth: 130 MHz, 3 dB