microphone
2 pages across tutorials, modules, pinouts and guides.
intermediateModule
PDM Microphone
A LinkMems LMD2718T261-OA1 MEMS microphone on a TinkerBlock board that sends sound as one bit per clock pulse. It needs a board with a PDM input, such as the ESP32-S3's I2S0, and 3.3 V. Two signal wires, CLK in and DATA out; ordinary speech reads a few tens out of 32767, so sketches subtract an offset and apply gain.
beginnerModuleUpdated
Analog Microphone
An electret capsule and a one-transistor amplifier on a TinkerBlock board. SIGNAL rests at a level set by the transistor's gain and swings above and below it with sound, in a band of roughly 75 Hz to 1 kHz. Read the peak-to-peak over 50 ms: it hears claps, knocks and loud voices, and it is not a recording microphone.