
Kicad hx711 tyny85
IvDm/Z-probe-on-smd-resistors-2512
Auto bed level strain gage for 3D printer using resistors 2512 instead of strain gauges.

Designed for 2oz Copper / 0.8mm thickness
BionicCactusPCB is an open-source printed circuit board by samsonmking, from the samsonmking/BionicCactusPCB repository on GitHub. It is a 2-layer board of 71.1 × 109.2 mm with 41 parts on 36 nets, routed with 277 tracks and 23 vias.
It is built around the HX711. Its parts include 14 capacitors, 6 resistors, 6 connectors, 5 ICs and 2 transistors.

| Output | Current Rating (A) |
|---|---|
| Light | 3 |
| Pump Motor | 3 |
Designed for 2oz Copper / 0.8mm thickness
Made with KiCad Version 4.07. Not yet compatible with version 5.
Download Schematic PDF
Order on OshPark here
| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 0.1uF | Capacitors_SMD:C_0805_HandSoldering | C1, C3, C4, C5, C7, C8, C10 |
| 6 | 10uF | Capacitors_SMD:C_1812_HandSoldering | C2, C6, C11, C12, C13, C14 |
| 3 | 100 | Resistors_SMD:R_0805_HandSoldering | R1, R5, R6 |
| 1 | 10K | Resistors_SMD:R_0805_HandSoldering | R2 |
| 1 | 10uF, 20V | Capacitors_Tantalum_SMD:CP_Tantalum_Case-V_EIA-7343-20_Hand | C9 |
| 1 | 12VCC | Connectors_Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm | J1 |
| 1 | 20K | Resistors_SMD:R_0805_HandSoldering | R3 |
| 1 | 3.3uH | Inductors_SMD:L_0805_HandSoldering | L1 |
| 1 | 8.2K | Resistors_SMD:R_0805_HandSoldering | R4 |
| 1 | BT4403 | TO_SOT_Packages_SMD:SOT-23_Handsoldering | Q1 |
| 1 | Button_Header | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J6 |
| 1 | DRIVER-TB6612FNG-O/C8/EL(SSOP24)_Parallel | DRIVER-TB6612FNG-O_C8_EL_SSOP24_:SSOP-24_5.3x8.2mm_Pitch0.65mm_tng_mod_parallel | U1 |
| 1 | FDD9411L_F085 | TO_SOT_Packages_SMD:TO-252-2 | Q2 |
| 1 | Fuse | Fuse_Holders_and_Fuses:BladeFuse-Mini_Keystone_3568 | F1 |
| 1 | HX711 | Housings_SSOP:SOP-16_4.4x10.4mm_Pitch1.27mm | U2 |
| 1 | LOGO | logo:logo | G*** |
| 1 | Light | Connectors_Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm | J3 |
| 1 | MountingHole_3mm | Mounting_Holes:MountingHole_3mm | |
| 1 | NCP1117-3.3_TO252 | TO_SOT_Packages_SMD:TO-252-2 | U4 |
| 1 | NCP1117-5.0_TO252 | TO_SOT_Packages_SMD:TO-252-2 | U5 |
| 1 | NET-TIE | net_tie:NET-TIE-0.3mm | W1 |
| 1 | Pump | Connectors_Terminal_Blocks:TerminalBlock_bornier-2_P5.08mm | J2 |
| 1 | Scale | TerminalBlocks_Phoenix:TerminalBlock_Phoenix_MPT-2.54mm_4pol | J4 |
| 1 | Soil | TerminalBlocks_Phoenix:TerminalBlock_Phoenix_MPT-2.54mm_3pol | J5 |
| 1 | WeMos_mini | wemos_d1_mini:D1_mini_board | U3 |
The 38 most common of 41 parts.
It measures 71.1 × 109.2 mm and has 2 copper layers, 1.6 mm thick.
41 parts, built around the HX711. 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.
From the samsonmking/BionicCactusPCB repository on GitHub, at the commit this page was made from: the board is BionicCactusPCB.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask samsonmking before reusing the design.

IvDm/Z-probe-on-smd-resistors-2512
Auto bed level strain gage for 3D printer using resistors 2512 instead of strain gauges.




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