Simple Condenser Mic Preamplifier Circuit using 2N3904
This is simple condenser mic preamp circuit using 2N3904, The mic bring to change the sound to electrical signals. it is simple circuit and use 9V battery Read more
2N3904
Very simple amplifier circuit using transistor 2N3904
It is Very simple amplifier circuit using transistor 2N3904 only, low noise than normal IC circuits, low distortion,frequency response: 20 Hz to 20 kHz. Read more