sound
2 pages across tutorials, modules, pinouts and guides.
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.
beginnerModuleUpdated
Passive Buzzer
A magnetic buzzer with no oscillator of its own, switched by a transistor on a TinkerBlock board. It sounds only while SIGNAL is a square wave, at the wave's frequency, so tone() plays any note; it is loudest at its 2.7 kHz resonance. Held HIGH it is silent and the coil draws about 200 mA.