Meeting Topic: Building the electronic design of our capacitive microphone
Moderator Name: Federico López
Speaker Name: Federico López
Other business or activities at the meeting: Pre-planification of Group presentation at AES Argentina Expo 2019
Meeting Location: Buenos Aires
The past Thursday 6 we reunited with Group 3 in order to continue the design of the capacitive microphone with adjustable spectral selection. We decided to leave for a moment the diaphragm design in order to not delay anymore the electronics!
We started the production of the boostrap, a circuit to raise the impedance since in Argentina some resistance values are not easily achieved. This design raises the phantom power of 48VDC to values close to 300VDC: these values are necessary to achieve the polarization of the plates. We have an old, broken, but still beautiful C414 that we analyze with a critical eye to improve the design of the circuit.
At the same time, we printed more of the plastic parts that will allow us the making of the microphone.
Written By: Federico López