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The TK27 at an angle: a black board with a wide gold border, a round black microphone capsule in a foam ring near the top, a small transistor and a few resistors and capacitors beside it, a gold microphone icon, lonely binary up the left edge, ANALOG in a box on the right, and a right-angle four-pin header labelled GND, VCC, NC and SIGNAL.3D
You have thistk27

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.

Hears best
75 Hz to 970Hz from 5 V
Rests at
1.6 to 4.0V from 5 V, by part
A clap
50ms window: read the swing
VCC
3.3or 5 V, to match your board
Start here · 01 The four pinsOpen the board in 3D

Turn it over and see the three holes to wire: GND, VCC and SIGNAL. The microphone is the round part at the top; SIGNAL is an analog level that swings when a loud sound arrives.

Product questions & answers ↓

The whole handbook10 articles · 50 minQuick referencePDF · 510 KBAnalog Microphone model (GLB)GLB · 4.5 MBAnalog Microphone CAD (STEP)ZIP · 901 KBAnalog Microphone drawing (PDF)PDF · 2.4 MBAnalog Microphone drawing (DXF)ZIP · 52 KBS8050 datasheetPDF · datasheet.lcsc.comPinout and specsThe pin table, and the questions people ask first
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Analog Microphone

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Need another

Not on general sale yet. Reply to your order and we will sort out a spare — quote tk27.

Order or missing parts?

Email us or reply to your order, and quote tk27 — that identifies the product. If something is missing from the bag, your order is the record of what shipped.

Take it with you

Point a phone camera at the code and this page opens there. It is the same address as the one printed on your box, so it is also what to show someone you are passing the board to.