I wanted to have a mic which I cought use for general purpose recording in conjunction with my old iriver h120 (with rockbox installed). I didn’t found a suitable mic without a build in recorder:)
So after a little bit googleing I found this article about a low-cost
homebrew solution and decided to get a bunch of these panasonic wm61-capsules described in the article to start experimenting with them – here is the result.
A special feature of this microphone is it’s variable stereo width (by time-of-arrival stereophony).
The button near the audio jack is the on/off-swiitch, the second one a gain boost. By swapping two resistors in the circuit, the gain boost could be easily converted to a gain damp. The preamp circuit isn’t necessary at all, if your recorders preamp has phantom power. But the 9v battery increases the headroom for louder signals and powers the 4 capsules more convenient. The distance between capsules and preamp shouldn’t boo to long.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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