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The PCA9685 board from above at an angle: a green 1000 µF capacitor and a two-way screw terminal along the back edge beside a USB-C socket, the 28-legged chip in the middle, six right-angle pins on the left edge printed GND, VCC, SDA, SCL, OE and V+, a black six-way socket on the right edge, and three rows of sixteen pins along the front in yellow, red and black.
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PCA9685 16-Channel Servo Driver Board, USB-C Powered

A PCA9685 board that keeps sixteen servo pulses running by itself while the microcontroller talks to it over I²C. Servo power on V+ from USB-C or a screw terminal, the chip on VCC, six address pads, and a header on each edge so boards plug into each other. Three boards a box, headers soldered.

Channels
1612-bit, one shared frequency
V+
6V at most, from USB-C or the terminal
Address
0x40out of the box, six pads to change it
Start here · 01 Sixteen pulses on two wiresOpen the board in 3D

Every hole and every part: the six header pins on both edges, the sixteen channels with their 220 Ω resistors, the two regulators and the transistor that guards both power inlets.

Product questions & answers ↓

The whole handbook13 articles · 60 minQuick referencePDF · 561 KBDatasheetPDF · nxp.comME6212 datasheetPDF · datasheet.lcsc.comME6217 datasheetPDF · datasheet.lcsc.comAO3401A datasheetPDF · aosmd.comModel (GLB)GLB · 5.9 MBCAD (STEP)ZIP · 5.9 MBDrawing (PDF)PDF · 2.0 MBDrawing (DXF)ZIP · 243 KBPinout and specsThe pin table, and the questions people ask first
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PCA9685 16-Channel Servo Driver Board, USB-C Powered

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PCA9685 16-Channel Servo Driver Board, USB-C Powered
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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.