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The TK43 at an angle: a black board with a wide gold border, a large round gold pad filling the upper half, a small hand icon at the top right, two round LEGO holes, two capacitors and a six-legged chip under the pad, a small LED and a resistor below them, lonely binary and ACTIVE HIGH up the sides, and a right-angle four-pin header along the front edge.
VR

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This board opens in a VR headset: life-size, or big enough to stand beside, with every pin and every part named where it sits. Open this address in the browser on a headset such as Apple Vision Pro or Meta Quest.

learn.lonelybinary.com/vr/tk43
You have this

TTP223 Touch Sensor

A 12 mm gold pad and a TTP223 touch chip on a TinkerBlock board: SIGNAL is HIGH while a finger is on the pad, through plastic or glass as well as bare, and LOW the rest of the time. Momentary and active-high in copper, with no jumper. SIGNAL is the chip's own output from VCC, so VCC goes to your board's logic supply, and the pad must be left alone for the half second after power-up.

VCC
2.0–5.5V; your board's logic supply
Answers in
220ms at most from rest
At power-up
0.5s hands off the pad
Wires
3GND, VCC, SIGNAL
Start here · 01 The four pinsOpen the board in 3D

Turn it over and see the three holes to wire: GND, VCC and SIGNAL. SIGNAL is the TTP223's own output, driven from VCC, so VCC goes to your board's logic supply.

Product questions & answers ↓

The whole handbook9 articles · 40 minQuick referencePDF · 411 KBTouch Sensor model (GLB)GLB · 952 KBTouch Sensor CAD (STEP)ZIP · 699 KBDatasheetPDF · files.seeedstudio.comPinout and specsThe pin table, and the questions people ask first
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TTP223 Touch Sensor

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Need another

Not on general sale yet. Reply to your order and we will sort out a spare — quote tk43.

Order or missing parts?

Email us or reply to your order, and quote tk43 — 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.