2 layers50.8 × 26.7 mm
MistMakerV1-4
Dav1dyang/Programmable-Mist-Maker
An open-source, low-cost ultrasonic mist maker designed to share commercial humidifier circuits and empower creators with accessible, well-documented hardware.
54 parts26MIT
2 layers38 × 25.1 mm
MistMaker Battery Kit V0-4
Dav1dyang/Programmable-Mist-Maker26An open-source, low-cost ultrasonic mist maker designed to share commercial humidifier circuits and empower creators with accessible, well-documented hardware.
- Size
- 38 × 25.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 105
- Nets
- 44
- Pads
- 193
- Tracks, vias
- 362, 110
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 13 May 2025
- Updated
- 7 Aug 2026
Overview
MistMaker Battery Kit V0-4 is an open-source printed circuit board by Dav1dyang, from the Dav1dyang/Programmable-Mist-Maker repository on GitHub, published under the MIT licence. It is a 2-layer board of 38 × 25.1 mm with 105 parts on 44 nets, routed with 362 tracks and 110 vias.
It is built around the TPS61023DRL, UCC27511ADBV and LP4060B5F, with the PH-2PWB, DMT10H009LCG-7-VB and PMEG10010ELRX-TP among its other parts. Its parts include 22 resistors, 15 connectors, 12 capacitors, 6 ICs and 4 diodes. It belongs with the power boards of this library.
Main components
8
TPS61023DRL
SOT-563-40℃~+125℃@(TJ) 1 1MHz 2.2V~5.5V 3A 3uA 500mV~5.5V Adjustable Boost Boost Built-in Overcurrent Protection、Light load efficient mode、Load disconnect Yes SOT-563 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
UCC27511ADBV
SOT-23-6-40℃~+140℃ 1 1V~1.2V 2.2V~2.4V 4.5V~18V 4A 7ns 8A 8ns IGBT、MOSFET Low Side Under Voltage Protection SOT-23-6 Gate Drivers ROHSTexas InstrumentsGate Drivers
LP4060B5F
SOT-23-5-40℃~+85℃ 1 3.9V~6V 4.2V 50uA 600mA Charging IC Lithium Battery SOT-23-5 Battery Management ROHSLOWPOWERBattery Management
PH-2PWB
SMD,P=2mm,卧贴-25℃~+85℃ 1 1x2P 2 200V 2A 2P 2mm 5.6mm 7.6mm 7.95mm Beige PH Surface Mount, Right Angle SMD,P=2mm,卧贴 Wire To Board Connector ROHSDEALONWire To Board Connector
DMT10H009LCG-7-VB
DFN-8(3x3)DFN-8(3x3) MOSFETs ROHSVBsemi ElecMOSFETs
PMEG10010ELRX-TP
SOD-123FLSchottky DiodesTECH PUBLIC
TS-1088-AR02016
SMD,4x3mm-30℃~+80℃ 1.6N 100,000 cycles 12V 2mm 3.9mm 3mm 50mA Black Round Button SMD(SMT) Tab SPST Surface Mount,Vertical Without Bracket SMD,4x3mm Tactile Switches ROHSXUNPUTactile Switches
XEL4030-102MEC
SMD,4x4mm10.7A 1uH 8.89mΩ 9A ±20% SMD,4x4mm Power Inductors ROHSCoilcraftPower Inductors
README
README.mdProgrammable Mist Maker
Open-source, programmable ultrasonic mist maker kits — by shuang cai & David Yang at ByProduct Lab.
📖 Documentation · 🛒 Buy a kit · 📜 OSHWA certified US002742 · ✍️ Build story on Hackster
Most mist-maker circuits online are undocumented black boxes. This project fills that gap: tested reference circuits, full KiCad sources, an Arduino library, and honest notes about what went wrong along the way — so creators, educators, and engineers can explore mist as a material. First presented as a hands-on workshop at the Open Hardware Summit 2025.
The boards
| Board | Power | Best for | Status |
|---|---|---|---|
| Extension Kit | USB-C | First builds, desks, classrooms | V0.1 — hardware + firmware ready |
| Battery Kit | Li-Po + USB-C | Portable builds, installations | V0.4.1 — in production, bench-validated |
| Block Kit | Li-Po + USB-C | Drop-in container UX, 14 LEDs | V0.1 — demoed at OHS 2026 |
| I2C MultiPack | TBD | Multi-emitter installations | In design |
| Legacy V1.4 | USB / Li-Po | Reproducing the original workshop kit | Shipped, frozen |
The two shipping boards: Extension Kit V0.1 (left) and Battery Kit V0.4.1 (right).
Each variant folder has its own README with pin maps, an order-ready BOM + JLCPCB production files, and build instructions. Board-by-board guides with interactive schematics live on the documentation site.
Start here
- Pick a board — the Extension Kit is the easiest first build; the Battery Kit cuts the cord. (Or buy one assembled and tested.)
- Flash the variant's BringUp sketch to verify the hardware feature by feature.
- Install the MistMaker Arduino library (v2.2+)
and work through the examples:
Blink→Breath→WaterDetect→PhoneDemo(control it from your phone). - Smart home?
firmware-examples/home-assistant/joins Home Assistant with no code at all (ESPHome).
How it works
An ESP32 drives a piezo disc at its 108.7 kHz resonance through a MOSFET and a 3-legged tapped inductor — an autotransformer + LC tank that steps 5 V up to the ~80 Vpp the disc needs, while a current-sense amp lets the firmware detect the disc and the water level on one ADC pin. The full story — atomization science, why that strange inductor is everywhere in Shenzhen and nowhere at DigiKey, and a verified alternative circuit — is at docs.byproductlab.com/how-it-works.
Repo map
| Path | Contents |
|---|---|
variants/<board>/ | Per-board KiCad project, BOM, production files, BringUp firmware, enclosure |
legacy/v1-4/ | The original workshop kit, preserved as documented (incl. duck & UFO enclosure STLs) |
firmware-examples/ | ESPHome / Home Assistant configs |
docs/ | The documentation site (MkDocs), incl. docs/assets/photos/ |
assets/ | Legacy V1.4 photos and the design-progress GIFs |
[!NOTE] Reproducing the legacy V1.4 board? It has a few quirks the V0.x boards designed away (power sequencing, upload-while-misting) — fixes are preserved on the Legacy V1.4 docs page.
Use and care
[!WARNING] Water + electronics + time = biology. Use distilled or clean tap water, clean the container regularly, and let cotton sticks dry between uses. Never run a disc dry for long, and never drive the circuit without a disc attached. Full notes in the docs.
License & credits
Open source under the MIT License, certified open source hardware (OSHWA US002742). Designed and tested by David Yang and shuang cai, inspired by community reverse-engineering and YouTube teardowns — full reference list in the docs.
Parts of the documentation were drafted with AI assistance; all technical content is validated against bench measurements and datasheets.
Contact: contact@byproductlab.com · @dav1dyang
Parts
105| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | Conn_01x01 | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | J4, J5, J9, J11, J12, J13, J14, J15 |
| 5 | 10KΩ | PCM_JLCPCB:R_0402 | R8, R14, R16, R18, R19 |
| 5 | 10uF | PCM_JLCPCB:C_0603 | C5, C6, C12, C15, C16 |
| 4 | TestPoint | SparkFun-Connector:TestPoint-1.0mm | TP2, TP3, TP4, TP6 |
| 3 | 22uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7, C8, C9 |
| 3 | 5.1KΩ | PCM_JLCPCB:R_0402 | R5, R6, R7 |
| 3 | G*** | kibuzzard-69EB898A | kibuzzard-69EB898A, kibuzzard-69EB898A, kibuzzard-69EB898A |
| 3 | G*** | kibuzzard-69EB8976 | kibuzzard-69EB8976, kibuzzard-69EB8976, kibuzzard-69EB8976 |
| 2 | 100K | PCM_JLCPCB:R_0402 | R13, R21 |
| 2 | 100KΩ | Resistor_SMD:R_0603_1608Metric | R11, R17 |
| 2 | 10uF | PCM_JLCPCB:C_0402 | C13, C14 |
| 2 | 30KΩ | PCM_JLCPCB:R_0402 | R4, R15 |
| 2 | Conn_01x07_Socket | Connector_PinSocket_2.54mm:PinSocket_1x07_P2.54mm_Vertical | J7, J8 |
| 2 | Conn_01x07_Socket | DavidLib_Connector:PinSocket_1x07_P2.54mm_Vertical_MiniSilk | J1, J10 |
| 2 | G*** | kibuzzard-69DF44F0 | kibuzzard-69DF44F0, kibuzzard-69DF44F0 |
| 2 | G*** | kibuzzard-69DF4510 | kibuzzard-69DF4510, kibuzzard-69DF4510 |
| 2 | MountingHole_Pad | DavidLib_Connector:MountingHole_2.7mm_M2.5_ISO7380_Pad_SmallerPad | H1, H2 |
| 2 | PH-2PWB | DavidLib_Connector:PH2PWB | J2, J3 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 10Ω | PCM_JLCPCB:R_0603 | R2 |
| 1 | 150Ω | PCM_JLCPCB:R_0402 | R9 |
| 1 | 1kΩ | Resistor_SMD:R_0402_1005Metric | R10 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric | C10 |
| 1 | 2.2Ω | PCM_JLCPCB:R_0603 | R3 |
| 1 | 220K | PCM_JLCPCB:R_0402 | R22 |
| 1 | 22Ω | PCM_JLCPCB:R_0402 | R20 |
| 1 | 2N7002 | PCM_Package_TO_SOT_SMD_AKL:SOT-23 | Q1 |
| 1 | 3 Legged Inductor | DavidLib_Power:IND-SMD_3P-CD75 | L1 |
| 1 | 30mΩ | Resistor_SMD:R_1206_3216Metric | R1 |
| 1 | 732K | PCM_JLCPCB:R_0402 | R12 |
| 1 | AP7361C-3.3V | PCM_SparkFun-Semiconductor-Standard:DFN-8_3x3mm_P0.65mm_EP2.25x1.5mm | U2 |
| 1 | DMT10H009LCG-7 | DavidLib_Switch:DMP3007SCG7 | Q4 |
| 1 | G*** | kibuzzard-69EB87F5 | kibuzzard-69EB87F5 |
| 1 | G*** | kibuzzard-6A488614 | kibuzzard-6A488614 |
| 1 | G*** | kibuzzard-6A38CD61 | kibuzzard-6A38CD61 |
| 1 | G*** | kibuzzard-69E03B47 | kibuzzard-69E03B47 |
| 1 | G*** | kibuzzard-69DF40F6 | kibuzzard-69DF40F6 |
| 1 | G*** | kibuzzard-69EB47E7 | kibuzzard-69EB47E7 |
| 1 | G*** | kibuzzard-69DF3D93 | kibuzzard-69DF3D93 |
| 1 | G*** | kibuzzard-69EB8D01 | kibuzzard-69EB8D01 |
| 1 | G*** | kibuzzard-69EB8B1C | kibuzzard-69EB8B1C |
| 1 | G*** | kibuzzard-69DF414F | kibuzzard-69DF414F |
| 1 | G*** | kibuzzard-69DF407A | kibuzzard-69DF407A |
| 1 | G*** | kibuzzard-69EB84CC | kibuzzard-69EB84CC |
| 1 | G*** | kibuzzard-69DF40D0 | kibuzzard-69DF40D0 |
| 1 | G*** | kibuzzard-69DF3D6E | kibuzzard-69DF3D6E |
| 1 | G*** | kibuzzard-69EB87CA | kibuzzard-69EB87CA |
| 1 | G*** | kibuzzard-6A316FBE | kibuzzard-6A316FBE |
| 1 | G*** | kibuzzard-69EB470E | kibuzzard-69EB470E |
| 1 | G*** | kibuzzard-6A317060 | kibuzzard-6A317060 |
| 1 | G*** | kibuzzard-69EB8824 | kibuzzard-69EB8824 |
| 1 | G*** | kibuzzard-69EB8B4D | kibuzzard-69EB8B4D |
| 1 | G*** | kibuzzard-69EB4726 | kibuzzard-69EB4726 |
| 1 | G*** | kibuzzard-6A2F79F4 | kibuzzard-6A2F79F4 |
| 1 | G*** | kibuzzard-69EB8840 | kibuzzard-69EB8840 |
| 1 | GRAPHIC | Mist_Library:DUCKY_ICON_S | TP1 |
| 1 | INA180A3 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | LED_G | SparkFun-LED:LED_0402_1005Metric | LED1 |
| 1 | LED_R | SparkFun-LED:LED_0402_1005Metric | LED2 |
| 1 | LED_W | SparkFun-LED:LED_0402_1005Metric | LED3 |
| 1 | LP4060B5F | DavidLib_Power:BATT_Charger_SOT-23-5_Min_Silk | U1 |
| 1 | PMEG10010ELRX-TP | PCM_JLCPCB:D_SOD-123FL | D1 |
| 1 | Qwiic_Vertical | SparkFun-Connector:JST_1x04_P1.0mm_Vertical_SMD | J6 |
| 1 | SolderJumper_2_Close | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP5V5 |
| 1 | TPS2116DRLR | DavidLib_Mux:TPS62932DRLR | IC2 |
| 1 | TPS61023 | DavidLib_Power:SOT-563 | IC1 |
| 1 | TS-1088-AR02016 | DavidLib_Switch:TS1088AR02016 | S2 |
| 1 | UCC27511ADBV | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | XEL4030-102MEC | DavidLib_Power:XEL4030102MEC | L2 |
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Dav1dyang/Programmable-Mist-Maker
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33 parts26MIT
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Questions
How big is the MistMaker Battery Kit V0-4 PCB?
It measures 38 × 25.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MistMaker Battery Kit V0-4 use?
105 parts, built around the TPS61023DRL, UCC27511ADBV, LP4060B5F and PH-2PWB. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the MistMaker Battery Kit V0-4 KiCad files?
From the Dav1dyang/Programmable-Mist-Maker repository on GitHub, at the commit this page was made from: the board is variants/battery-kit/hardware/kicad/MistMaker-Battery-Kit-V0-4.kicad_pcb and its schematic legacy/v1-4/hardware/MistMakerV1-4.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MistMaker Battery Kit V0-4 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).