2 layers35 × 38.7 mm
Rpi2040-lcd gauge
fharold/rpi2040-lcd-gauge
Basic and versatile gauges based on the WAVESHARE RP2040-LCD-1.28 module. A small HAT enhances it:
52 parts
2 layers49 × 41 mm
Poachstopper
TheCodedKid/poachstopperRelay Protection Circuit for MIT Mini Cheetah Motor
- Size
- 49 × 41 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 16
- Pads
- 58
- Tracks, vias
- 91, 5
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 22 Jun 2026
- Updated
- 30 Jun 2026
Overview
Poachstopper is an open-source printed circuit board by TheCodedKid, from the TheCodedKid/poachstopper repository on GitHub, published under the MIT licence. It is a 2-layer board of 49 × 41 mm with 20 parts on 16 nets, routed with 91 tracks and 5 vias.
It is built around the LMR16006XDDCT, NE555DR-MS and XT60PW-M, with the SMW510RJT among its other parts. Its parts include 6 resistors, 4 capacitors, 2 ICs, 2 diodes and 2 connectors.
Main components
4
LMR16006XDDCT
TSOT-23-6-40℃~+125℃@(TJ) 1 28uA 4V~60V 600mA 700kHz Adjustable Buck Buck Built-in No TSOT-23-6 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
NE555DR-MS
SOP-8-20℃~+70℃ 1 1.5mA 200mA 4.5V~15V SOP-8 555 Timers / Counters ROHSMSKSEMI555 Timers / Counters
XT60PW-M
-Horizontal plug Yellow - Power connector / plug connector ROHSChangzhou Amass ElecPlug
SMW510RJT
SMD,13.5x7.3mm-55℃~+200℃ 10Ω 500V 5W Wirewound Resistor ±200ppm/℃ ±5% SMD,13.5x7.3mm Chip Resistor - Surface Mount ROHSTE ConnectivityChip Resistor - Surface Mount
README
README.md
Inline soft-start for Mini Cheetah motor controllers. Stops the power-on inrush surge that kills the input caps.
Why
Cheap MIT Mini Cheetah clones have undersized input caps and no inrush limiting. Hot-plugging a charged battery, current spike into the FETs, caps die. No good, dead cheetah.
Poach Stopper splices inline on the battery lead, pre-charges through a resistor, then hands over full current. No MCU, no firmware, no buttons.
Delay time is calculated to be about 0.24 seconds, but this is due to nearly zero documentation on the knockoff motor's cap bank size, so this is more of a safety number + I think you can wait a quarter second, but if this is not the case, submit an issue.
How it works
| Block | Parts | Job |
|---|---|---|
| Soft-start bypass | G2RL-1A relay + R3 (10 Ω 5 W) | limits inrush; relay shorts it once charged |
| Delay timer | NE555 monostable mode | |
| 5 V rail | LMR16006 buck, 24 V → 5 V | Powers the 555 + relay coil off the pack |
| Protection | Blade fuse F1, 1N4007 flyback D3 | Fault current + coil kickback |
Build it
JLCPCB order files are in fab/:
fab/poachstopper-gerbers.zip— gerbersfab/poachstopper-cpl.csv— pick-and-placebom/jlcpcb_bom.csv— assembly BOM (LCSC parts)
Hand-solder yourself (not on PnP BOM): R3 (10 Ω 5 W), F1 fuse holder, RLA1 relay, XT60 connectors J1/J2.
Source is KiCad 10 — open poachstopper.kicad_pro.
License
MIT © 2026 TheCodedKid
Parts
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 10uF | PCM_fab:C_1206 | C3, C4 |
| 2 | XT60PW-M | kicad-import:CONN_XT60PW-M_AMA | J1, J2 |
| 1 | 10 | PCM_fab:R_1206 | R2 |
| 1 | 100k | PCM_fab:R_1206 | R9 |
| 1 | 100nF | PCM_fab:C_1206 | C2 |
| 1 | 10k | PCM_fab:R_1206 | R8 |
| 1 | 1M | PCM_fab:R_1206 | R1 |
| 1 | 1N4007_C727081 | kicad-import:SMA_L4.3-W2.5-LS5.0-RD | D3 |
| 1 | 220nF | PCM_fab:C_1206 | C1 |
| 1 | 22uH | PCM_SparkFun-Coil:0805 | L1 |
| 1 | 56.2k | PCM_fab:R_1206 | R7 |
| 1 | 60V/1A | PCM_fab:Diode_Schottky_0603 | D2 |
| 1 | Blade Fuse | PCM_SparkFun-Fuse:Fuseholder_Automotive | F1 |
| 1 | G2RL-1A-E DC5 | kicad-import:RELAY_G2RL-1A-E_DC5_OMR | RLA1 |
| 1 | LMR16006XDDCT | kicad-import:SOT95P280X110-6N | U3 |
| 1 | LOGO | LOGO | G*** |
| 1 | NE555DR-MS | kicad-import:SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL | U2 |
| 1 | SMW510RJT | kicad-import:RES-SMD_L13.5-W7.3 | R3 |
Questions
How big is the Poachstopper PCB?
It measures 49 × 41 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Poachstopper use?
20 parts, built around the LMR16006XDDCT, NE555DR-MS, XT60PW-M and SMW510RJT. 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 Poachstopper KiCad files?
From the TheCodedKid/poachstopper repository on GitHub, at the commit this page was made from: the board is poachstopper.kicad_pcb and its schematic poachstopper.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Poachstopper 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).
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