Medallion
ΠAN's eyes and ears, worn on your chest.
- 1.75 inch round AMOLED
- 5 MP camera
- 2 microphones
- Speaker
- Flashlight
- Wi-Fi and Bluetooth LE
What it is
The Medallion is a round pendant you wear on a cord, on your chest. The front is a round touch screen. Around it are a camera, two microphones, a speaker and a small flashlight.
It is the eyes and ears of ΠAN. Your phone and your computer at home do the thinking.
With ΠAN
- Ask ΠAN anything out loud. The answer comes back from the speaker on your chest. No phone in your hand.
- Live translation. You speak your language and the other person hears theirs from the Medallion. You read their reply on its screen or your phone.
- Translation works with just the Medallion and a phone: no computer, no account, and no internet needed.
- Memory of the world around you. The camera can take a picture every few seconds, so later you can ask where you left your keys. Pictures are stored and described on your own computer. They never leave your hardware.
- A hands-free flashlight, turned on by voice.
The real design, in 3D
Made straight from the design files. Turn it and zoom in.
The case: front shell with the screen, back cover and power button. Drag to turn. Click, then scroll to zoom; pinch on a phone.
The round main board with its parts, exported from KiCad. Drag to turn. Click, then scroll to zoom; pinch on a phone.
Schematic and board
The KiCad files themselves, in your browser. Pan, zoom, click a part or a net to see it. Nothing to install.
The schematic is drawn from the board file, one sheet per block: each pin has a label with its net name, and the same name means the same net on every sheet. Use the file list in the viewer to switch between the sheets and the board.
How the parts work
Screen
A 1.75 inch round AMOLED touch screen (466 x 466 pixels) on the front. It plugs into the board with a ribbon cable.
Brain and radio
An ESP32-S3 module with Wi-Fi and Bluetooth LE. It talks to your phone over Bluetooth and can use Wi-Fi at home. The radio module is pre-certified.
Camera
A 5 megapixel camera module on a flat cable. It plugs into the board, so a standard module fits.
Two microphones
Side by side behind small sealed holes. Your voice is much louder at the Medallion than anyone else's, which helps ΠAN tell your voice from other people.
Speaker
A small speaker with its own amplifier. Sound leaves through slots in the rim.
Flashlight
A white LED with a constant current driver, shining through a hole in the front.
Motion sensor
A 6-axis motion sensor (IMU) on the board.
Power
A rechargeable battery of about 2000 mAh behind the board, a power and charging chip, and USB-C for charging and data. The Belt can feed it over a USB-C lead.
Power button
A small button in the rim. Its cap cannot fall out or be pushed in too far.
Board and case
One round board, 60 mm across, 4 layers, right behind the screen. The case is a front shell and a back cover held by two small screws.
Specs
- Size
- About 65 x 72 x 23 mm with the case
- Screen
- 1.75 inch round AMOLED, touch, 466 x 466
- Camera
- 5 megapixels
- Audio
- 2 microphones, 1 speaker
- Light
- White LED flashlight
- Radio
- Wi-Fi and Bluetooth LE
- Battery
- About 2000 mAh, rechargeable
- Charging
- USB-C, 5 V
Parts list
Every part on the board: value, package and how many. Parts that plug in after assembly are listed above under How the parts work.
Main board49 lines, 162 parts
| Value | Package | Qty |
|---|---|---|
| 22uF | 0603 | 6 |
| 100nF | 0402 | 21 |
| 1uF | 0402 | 30 |
| 10uF | 0603 | 9 |
| 2.2uF | 0402 | 8 |
| 1nF | 0402 | 1 |
| 22pF | 0402 | 9 |
| 470nF | 0402 | 2 |
| 10nF | 0402 | 1 |
| 2.2nF | 0402 | 1 |
| 100pF | 0402 | 1 |
| 220nF | 0402 | 2 |
| 4.7uF | 0402 | 4 |
| 10uF | 0402 | 1 |
| LTVS16H5.0ET5G | DFN1610-2L L1.6-W1.0-P1.10-RD | 1 |
| XL-HD3535UWC-A2 | LED-SMD 3P-L3.5-W3.5 XL-HD3535UWC-A2-3 | 1 |
| TYPE-C-31-M-12 | USB-C SMD-TYPE-C-31-M-12 1 | 1 |
| SM02B-GHS-TB | CONN-SMD SM02B-GHS-TB-LF-SN | 2 |
| FH26W-31S-0.3SHW | CONN-SMD FH26W-31S-0.3SHW-60 | 1 |
| FH34SRJ-24S-0.5SH(50) | CONN-SMD FH34SRJ-24S-0.5SH | 1 |
| 1uH 3.2A | 1008 | 2 |
| LMA2718B381-OA5-2 | MIC-SMD 3P-L2.8-W1.9 ZTS6056 | 2 |
| BSS138 | SOT-23 | 1 |
| 10K | 0402 | 16 |
| 5.1K | 0402 | 2 |
| 22R | 0402 | 3 |
| 510R | 0402 | 1 |
| 1K | 0402 | 1 |
| 2.2K | 0402 | 6 |
| 0R | 0402 | 3 |
| 150K | 0402 | 2 |
| 51R | 0402 | 1 |
| 20K | 0402 | 3 |
| 4.3K | 0402 | 1 |
| 5.1R | 0402 | 1 |
| 10K NTC | 0402 | 1 |
| SW_Push | SW SPST TS-1088-xR020 | 1 |
| SKRTLAE010 | SW Alps SKRTLAE010 trimmed | 1 |
| ESP32-S3-WROOM-1 | WIRELM-SMD ESP32-S3-WROOM-1 | 1 |
| AXP2101 | QFN-40 L5.0-W5.0-P0.40-TL-EP3.4 | 1 |
| TCA9554PWR | TSSOP-16 L5.0-W4.4-P0.65-LS6.4-TL | 1 |
| QMI8658A | LGA-14 L3.0-W2.5-P0.50-TL | 1 |
| ES8311 | WQFN-20 L3.0-W3.0-P0.40-BL-EP1.7 | 1 |
| NS4150 | MSOP-8 L3.0-W3.0-P0.65-LS5.0-BL | 1 |
| ES7210 | QFN-32 L4.0-W4.0-P0.40-BL-EP2.7 | 1 |
| ME6211C15M5G | SOT-23-5 L3.0-W1.7-P0.95-LS2.8-BR | 1 |
| ME6211C28M5G | SOT-23-5 L3.0-W1.7-P0.95-LS2.8-BR | 1 |
| CN5711 | SOIC-8 L5.0-W4.0-P1.27-LS6.0-BL-EP2.0 | 1 |
| USBLC6-2SC6 | SOT-23-6 | 1 |
Pictures
Renders and drawings from the design files.
Design files
The Medallion is an open design. Build it, sell it, improve it.
- BoardKiCad 10 board file, schematic, design rules
- Factory filesGerbers, drill files, parts list and placement file
- CaseSTEP files for the front shell, back cover and button, and the script that makes them
Make one
Every ΠAN Gear design is open. Build the Medallion, sell it, improve it. Tell us at makers@thepanproject.com and we test it with ΠAN, help you get it right, and feature it here.