You build it
Build-it-yourself kit
The same robot as eight parts. One evening, no soldering.
We match the parts, print the shell, and address and centre the servos.
Book today
₹599Full price
₹5,999SKU PBL-KIT-01
For developers · open source
Stack-chan, on an M5Stack CoreS3 Lite.
An ESP32-S3 with a touch display, camera, two microphones and a speaker, on a two-servo neck in a printed shell. It runs the open-source Stack-chan firmware, in JavaScript on the Moddable SDK, and Arduino and M5Unified work too. Build it yourself, or have it arrive assembled.
Kit or assembled · ₹5,999 either way · ₹599 to book, the rest on delivery
PhotoWhat is on the board
Stock parts, named exactly.
Look every one of them up before you buy. Nothing here is proprietary, and nothing is locked.
- Face and eyesU1 · ILI9342C
- Animated expressions, blinking and gaze on a 2.0" 320 × 240 IPS display. Draw your own faces.
- Two-axis headM1 · M2 · A1
- Pan and tilt on two SCS0009 bus servos, each on its own address on one RS485 pair, with position readback.
- VoiceU1 · ES7210 · AW88298
- Dual microphones on an ES7210 codec and a 1 W speaker on an AW88298 amplifier, for voice applications.
- TouchU1 · FT6336U
- A capacitive touch display, and three-zone touch on the body.
- CameraU1 · GC0308
- A GC0308 camera for video viewing and programmable vision features.
- ConnectivityU1 · ESP32-S3
- Wi-Fi, Bluetooth LE and NFC hardware. ESP-NOW for wireless remote control, and firmware updates over the air.
In the box
8 parts. Nothing else to buy.
Including the printed shell and the fasteners. For the kit, you supply a USB-C cable and a computer.
- U1× 1M5Stack CoreS3 LiteESP32-S3 controller with a 2.0" touch display, camera, dual mics and speaker. This is the face and the brain.
- M1× 1SCS0009 bus servo, pan6 V, 2.3 kg·cm, 300° of travel. Turns the head left and right.
- M2× 1SCS0009 bus servo, tiltSame servo, its own address on the bus. Nods the head up and down.
- A1× 1Waveshare bus servo driverDrives both servos over one RS485 pair and carries the servo power rail.
- PS1× 15 V 3 A power supply5.5 mm DC plug, sized so both servos can stall at once without a brownout.
- H1× 1 set3D-printed shell and bracketsPrinted here and shipped with the kit. You do not need a printer.
- W1× 1 set20 cm Dupont cable set40-pin, male/male, male/female and female/female.
- F1× 1 setM2×8 and M3×16 fastenersHigh-tensile, black oxide, countersunk so the shell sits flush.
How you build it
Four steps, one evening.
In order, because the order matters. No soldering.
- 01
Check the servos
Both arrive already addressed and centred: pan on one ID, tilt on the other. Power them up and confirm each answers before anything is bolted shut.
- 02
Build the neck
Both servos bolt into the printed brackets with the M2 and M3 fasteners. Pan on the bottom, tilt on top.
- 03
Wire the bus
Servos to the driver board, driver board to the controller, power supply to the rail. One pair of wires for both servos.
- 04
Flash it
Pull the Stack-chan firmware, build with the Moddable SDK, push it over USB-C. The face comes up and the head finds centre.
Real footage
Finished
What it becomes.
The same robot, built: one black, one white, on an ordinary table. And a video call from the phone app.
Real footage
Photo
Photo
PhotoSpecifications
Read the whole datasheet.
ControllerU1
| Specification | Detail |
|---|---|
| Main controller | ESP32-S3 Xtensa LX7 dual-core 32-bit, 240 MHz 16 MB Flash, 8 MB PSRAM |
| Wireless | 2.4 GHz Wi-Fi Bluetooth LE |
| Wired | USB-C, OTG and Serial/JTAG HY2.0-4P (PORT.A), M5-BUS |
| Display | 2.0-inch IPS LCD, 320 × 240, ILI9342C driver Capacitive touch, FT6336U driver |
| Camera | GC0308, 0.3 MP |
| Audio | AW88298 16-bit I²S amplifier, 1 W speaker ES7210 codec, dual microphone input |
| Sensors | BMI270 6-axis IMU + BMM150 magnetometer LTR-553ALS-WA proximity and ambient light |
| Power | AXP2101 PMIC BM8563 RTC 200 mAh LiPo |
| Storage | microSD slot |
| Dimensions | 54.0 × 54.0 × 16.5 mm 54 g |
MotionM1 · M2
| Specification | Detail |
|---|---|
| Servo | SCS0009 serial bus servo, two supplied |
| Bus | RS485, individually addressable Position readback |
| Operating voltage | 6 V |
| Stall torque | 2.3 kg·cm |
| Travel | 300° |
| Axes | Pan, driven by M1 Tilt, driven by M2 |
Power and driverA1 · PS1
| Specification | Detail |
|---|---|
| Driver board | Waveshare serial bus servo driver ST/SC series compatible |
| Supply | 5 V, 3 A 5.5 mm DC barrel plug |
| Rail | Servo supply kept off the controller rail |
Software
| Specification | Detail |
|---|---|
| Firmware | Stack-chan on the Moddable SDK Behaviour written in JavaScript |
| Also supported | Arduino core and M5Unified, in C++ |
| Licence | Apache License 2.0 |
Two ways to have one
Same robot. Same price.
₹5,999 for either, with ₹599 to book and ₹5,400 in cash on delivery. The only difference is who puts it together.
Done for you
Fully assembled
Ready the moment it arrives. Plug it in and it wakes up.
We build it, set it up, and check its face and every movement before it’s boxed.
Book today
₹599Full price
₹5,999SKU PBL-BOT-01
Stack-chan, the open-source desk robot by Shinya Ishikawa and contributors, built on an M5Stack CoreS3 Lite with two SCS0009 bus servos and a 3D-printed shell. We match the parts, print the shell, and address and centre the servos. It is not an official Stack-chan or M5Stack product, and the software is Stack-chan’s; we take no credit for it.
Order
Book yours.
Kit or assembled, your details and your colour. It takes about a minute.