4 layers184.1 × 197.7 mm
Hardfuzz v1 original
sat-wik/HardFuzz
Runs on a Digilent Cmod A7 (Xilinx Artix-7) wired inline with a NUCLEO-F446RE as the device under test. Injector BOM ≈ $40.
84 partsMIT
2 layers119 × 47.5 mm
Kinderradio
philippbrechel/childradioA esp32 based web radio for small child
- Size
- 119 × 47.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 111
- Nets
- 81
- Pads
- 332
- Tracks, vias
- 1,200, 209
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 26 Dec 2022
- Updated
- 16 Dec 2025
Overview
Kinderradio is an open-source printed circuit board by philippbrechel, from the philippbrechel/childradio repository on GitHub. It is a 2-layer board of 119 × 47.5 mm with 111 parts on 81 nets, routed with 1,200 tracks and 209 vias.
It is built around the ESP32-WROVER-IE, TLV61070ADBV and TLV62566DBV, with the BS170FTA, BSS84 and MBRA340 among its other parts. Its parts include 42 capacitors, 32 resistors, 9 ICs, 8 connectors and 5 transistors. It belongs with the radio and wireless boards and the ESP32 boards of this library.
Main components
6ESP32-WROVER-IE
WIFI-SMD18x31x3.3mm WiFi Modules ROHSEspressif SystemsWiFi Modules
TLV61070ADBV
SOT-23-6-40℃~+125℃@(TJ) 1 2.2V~5.5V 2.5A 3uA 500mV~5.5V 550kHz、1MHz Adjustable Boost Boost Built-in Yes SOT-23-6 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TLV62566DBV
SOT-23-5-40℃~+85℃@(TA) 1 1.5A 1.5MHz 2.7V~5.5V 50uA 600mV~5.23V Adjustable Buck Buck Built-in Yes SOT-23-5 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
BS170FTA
SOT-23-55℃~+150℃ 1 N-channel 2.8Ω@10V 250mA 25pF 2V 2pF 300mW 400pC@4.5V 5pF 60V SOT-23 MOSFETs ROHSUMWMOSFETsBSS84
SOT-23-55℃~+150℃ 1 P-Channel 130mA 2.8pF 24.6pF 2V 3.2Ω@5V 300mW 4.7pF 50V 590pC@10V SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETs
MBRA340
SMA(DO-214AC)-55℃~+150℃ 1 Independent 100A 300uA@40V 3A 40V 450mV@3A SMA(DO-214AC) Schottky Diodes ROHSonsemiSchottky Diodes
README
README.mdchildradio
An ESP32-based web radio designed specifically for small children.
The mechanics are highly robust, making it the only web radio capable of withstanding the daily life of a 1-year-old child.
Key-Features:
- Robust Wooden Design: Built to endure rough handling.
- 2x3W Stereo Class-D Amplifier: Provides clear, powerful sound.
- Beautiful Cover: Enhances aesthetics and child-friendliness.
- RGB LED Lighting: Creates an attractive background glow behind the cover.
- Web Server for Parental Control: Parents can manage settings via a web interface.
- Child-Friendly Controls: Only volume adjustment and channel skipping are accessible to the child.
- USB-C Charging Port: Modern, convenient charging.
- Battery-Powered: Runs on a single 18650 cell, ensuring portability.
Please view this video for a demonstration Video
Parts
111| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 100nF | Resistor_SMD:R_0805_2012Metric | C1, C6, C7, C10, C18, C19, C25, C33, C34, C35, C41, C43, C83 |
| 12 | 10uF | Resistor_SMD:R_1206_3216Metric | C0, C5, C8, C12, C15, C22, C27, C32, C36, C37, C38, C40 |
| 9 | 10k | Resistor_SMD:R_0805_2012Metric | R90, R91, R92, R93, R94, R95, R96, R97, R99 |
| 9 | 47uF | Capacitor_SMD:CP_Elec_6.3x5.2 | C2, C4, C9, C11, C14, C23, C26, C29, C42 |
| 5 | 180k | Resistor_SMD:R_0805_2012Metric | R1, R3, R4, R30, R31 |
| 5 | 47k | Resistor_SMD:R_0805_2012Metric | R33, R80, R81, R82, R83 |
| 4 | 1pF | Resistor_SMD:R_0805_2012Metric | C3, C13, C28, C39 |
| 4 | 2.2uH | Inductor_SMD:L_1008_2520Metric | L1, L2, L3, L4 |
| 4 | 20k | Resistor_SMD:R_0805_2012Metric | R2, R5, R6, R32 |
| 4 | 470 | Resistor_SMD:R_0805_2012Metric | R0, R7, R40, R41 |
| 3 | BS170F | Package_TO_SOT_SMD:SOT-23 | Q2, Q81, Q90 |
| 3 | LED | LED_THT:LED_D5.0mm | D2, D3, D90 |
| 3 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3 |
| 3 | TLV61070A | Package_TO_SOT_SMD:SOT-23-6 | U1, U2, U4 |
| 2 | 100k | Resistor_SMD:R_0805_2012Metric | R10, R12 |
| 2 | 12pF | Resistor_SMD:R_0805_2012Metric | C30, C31 |
| 2 | BSS84 | Package_TO_SOT_SMD:SOT-23 | Q1, Q80 |
| 2 | Conn_01x03_Male | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4, J5 |
| 2 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1, J2 |
| 2 | FerriteBead | Inductor_SMD:L_0805_2012Metric | FB1, FB2 |
| 2 | MAX983571 | kinderradio:max98357a | U12, U13 |
| 1 | 0 | Resistor_SMD:R_0805_2012Metric | R11 |
| 1 | 1uF | Resistor_SMD:R_0805_2012Metric | C91 |
| 1 | 220k | Resistor_SMD:R_0805_2012Metric | R13 |
| 1 | 330 | Resistor_SMD:R_0805_2012Metric | R98 |
| 1 | 470nF | Resistor_SMD:R_0805_2012Metric | C90 |
| 1 | BMS_1S | kinderradio:BMS_1S | U40 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | Conn_01x02_Female | kinderradio:Connector | J41 |
| 1 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J55 |
| 1 | Crystal_GND3 | Crystal:Crystal_DS15_D1.5mm_L5.0mm_Horizontal_1EP_style2 | Y1 |
| 1 | ESP32-WROVER-IE | kinderradio:ESP32-WROVER-IE | U3 |
| 1 | MBRA340 | Diode_SMD:D_SMA | D40 |
| 1 | MCP7940N-xP | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U30 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW1 |
| 1 | TLV62566 | Package_TO_SOT_SMD:SOT-23-5 | U20 |
| 1 | USB_C_molex_217178-0001 | kinderradio:217178-0001 | J40 |
Questions
How big is the Kinderradio PCB?
It measures 119 × 47.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Kinderradio use?
111 parts, built around the ESP32-WROVER-IE, TLV61070ADBV, TLV62566DBV and BS170FTA. 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 Kinderradio KiCad files?
From the philippbrechel/childradio repository on GitHub, at the commit this page was made from: the board is Hardware/kinderradio/kinderradio/kinderradio.kicad_pcb and its schematic Hardware/kinderradio/kinderradio/kinderradio.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Kinderradio design in my own project?
Its repository states no licence, so its author keeps all rights: ask philippbrechel before reusing the design.
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