Check below the capsule I will use for today, the JLI 2555 and is the same capsule used in this microphone that cost around 500 dollars. This will be later connected to the PCB I’ve ordered for the amplifier, since the audio signals from the capsule are very low, as you can see, just a few mV. Before we even start I have to mention this project was made by DIYperks and he made a super high quality video on this topic, so good that I had to try it myself as well. So please, check DIYperks channel for support.

For this project you will need, obviously, the microphone capsule, the preamplifier transistor and the amplifier PCB, an ADC or analog to digital converter molecule for audio and my 3D design together with some small components such as screws, elastic bands, ball screws, metal mesh, and the passive components for the amplifier. The full part list is below and the total price is around 20 dollars.