Lonely Binary
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The TK109 at an angle: a black board with a wide gold border, a three-way screw terminal along the back printed CANH, GND and CANL, three male pins in front of it, the eight-legged SN65HVD230 between two round LEGO holes, CAN BUS printed on the right, lonely binary up the left edge, and four right-angle pins out of the front edge printed GND, 3V3, CTX and CRX.
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View it in VR

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/tk109
You have this

CAN Bus

An SN65HVD230 CAN transceiver on a TinkerBlock board, for 3.3 V microcontrollers with a CAN controller of their own, such as most ESP32 chips. CTX and CRX go straight across, the 120 Ω fitted on every board belongs only on the two end boards, GND runs with a twisted pair, and one board alone can never finish a message.

Logic
3.3V only, never 5 V
Fitted
120Ω, keep on end boards only
Tested at
500kbit/s
In the box
6boards, headers fitted
Start here · 01 Two wires, many boardsOpen the board in 3D

Every pin and part: CTX and CRX straight across to your CAN controller, the 120 Ω between CANH and CANL, and the 10 kΩ that slows the chip's edges.

Product questions & answers ↓

The whole handbook9 articles · 45 minQuick referencePDF · 338 KBModel (GLB)GLB · 1.4 MBCAD (STEP)ZIP · 1.2 MBSN65HVD230 datasheetPDF · ti.comPinout and specsThe pin table, and the questions people ask first
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CAN Bus

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CAN Bus TK109
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Email us or reply to your order, and quote tk109 — 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.