

Valiant turtle-2
The Valiant Turtle 2
- Size
- 133.1 × 126.6 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 55
- Nets
- 63
- Pads
- 289
- Tracks, vias
- 803, 74
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 11 Dec 2024
- Updated
- 6 Jan 2025
Overview
Valiant turtle-2 is an open-source printed circuit board by simoninns, from the simoninns/valiant-turtle-2 repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 133.1 × 126.6 mm with 55 parts on 63 nets, routed with 803 tracks and 74 vias.
It is built around the LM2576S-5.0, 24LC16BT-I/OT and 74HC14, with the LM1117MP-3.3 and WS2812B among its other parts. Its parts include 18 capacitors, 10 connectors, 6 resistors, 5 ICs and 5 diodes. It belongs with the RP2040 boards of this library.
Main components
5LM2576S-5.0
TO-263-5-40℃~+125℃@(TJ) 1 3A 4V~40V 52kHz 5V 5mA Buck Built-in Fixed No Step-down type TO-263-5 DC-DC Converters ROHSSlkorDC-DC Converters24LC16BT-I/OT
SOT-23-5-40℃~+85℃ 1,000,000 cycles 16Kbit 2.5V~5.5V 200 Years 400kHz 5ms Hardware write protection function、Noise suppression function I2C SOT-23-5 EEPROM ROHSMicrochip TechnologyEEPROM74HC14
SOP-14-40℃~+85℃ 1.9V、3.98V、4.4V、5.48V、5.9V 100mV、260mV、260mV 20uA 25ns@4.5V,50pF 2V~6V 6 74HC Noise suppression function Schmitt trigger SOP-14 Inverters ROHSJSMSEMIInvertersLM1117MP-3.3
SOT-2230℃~+125℃@(Ta) 1 1.2V@(800mA) 15V 3.3V 5mA 75dB@(120Hz) 800mA 99uVrms Fixed Over Current Protection、Over Temperature Protection Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsWS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
README
README.mdValiant Turtle 2
The Valiant Turtle 2 is a modern re-creation of the Valiant Turtle robot from the 1980s. The project is fully open-hardware and open-software and is designed to be 3D printed and constructed from widely available parts.

Please see the project Wiki for details of the project and for access to the project documentation.
Project status
This project is at first release. Please read the wiki and see YouTube for consruction videos (detailed in the wiki also).
Author
Valiant Turtle 2 is designed and maintained by Simon Inns.
Software License (GPLv3)
Valiant Turtle 2 is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Valiant Turtle 2 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.Hardware License (Creative Commons BY-SA 4.0)
Please see the following link for details: https://creativecommons.org/licenses/by-sa/4.0/
You are free to:
Share - copy and redistribute the material in any medium or format Adapt - remix, transform, and build upon the material for any purpose, even commercially.
This license is acceptable for Free Cultural Works.
The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
Attribution - You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
ShareAlike - If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
No additional restrictions - You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Parts
55| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C4, C7, C11, C14, C15, C16, C17, C18 |
| 4 | 100uF | Capacitor_SMD:CP_Elec_8x6.2 | C3, C5, C6, C8 |
| 4 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4 |
| 4 | Aux_MountingHole | MountingHole:MountingHole_3.2mm_M3 | H4, H5, H6, H7 |
| 3 | Body_MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3 |
| 3 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D3, D4, D5 |
| 2 | 10uF Tant | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder | C12, C13 |
| 2 | DRV8825_Breakout | Module:Pololu_Breakout-16_15.2x20.3mm | A2, A3 |
| 1 | 1000uF | Capacitor_SMD:CP_Elec_10x10.5 | C9 |
| 1 | 100uH 3A | Bourns_Inductor:Inductor_SDR1307 | L1 |
| 1 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 1 | 24LC16BT-I/OT | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | 560R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 74HC14 | Package_SO:SO-14_3.9x8.65mm_P1.27mm | U5 |
| 1 | Battery | Connector_JST:JST_XH_B5B-XH-A_1x05_P2.50mm_Vertical | J9 |
| 1 | Exp. Header | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | J4 |
| 1 | Eyes | Connector_JST:JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical | J10 |
| 1 | INA260 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U3 |
| 1 | LM1117MP-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U4 |
| 1 | LM2576S-5 | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U2 |
| 1 | Left Motor | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J7 |
| 1 | Pen Servo Header | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J5 |
| 1 | Power Expansion | Connector_JST:JST_XH_B6B-XH-A_1x06_P2.50mm_Vertical | J6 |
| 1 | Power LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | Qwiic0 (NF) | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J1 |
| 1 | Qwiic1 | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J3 |
| 1 | RaspberryPi_Pico_W | Module_RaspberryPi_Pico:RaspberryPi_Pico_Common | A1 |
| 1 | Right Motor | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J8 |
| 1 | SS34 3A | Diode_SMD:D_SMC_Handsoldering | D1 |
| 1 | USART Header | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
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Questions
How big is the Valiant turtle-2 PCB?
It measures 133.1 × 126.6 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Valiant turtle-2 use?
55 parts, built around the LM2576S-5.0, 24LC16BT-I/OT, 74HC14 and LM1117MP-3.3. 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 Valiant turtle-2 KiCad files?
From the simoninns/valiant-turtle-2 repository on GitHub, at the commit this page was made from: the board is kicad/robot/mainboard/valiant-turtle-2.kicad_pcb and its schematic kicad/acorn_userport_adapter/parallel_adapter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Valiant turtle-2 design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).