# Remote Pico Controller ## Description Raspberry Pi Pico HAT for WiFi communication and independent control of up to four 9V motors from GPIO GP18-GP21. ## Project Details - **Owner:** dacre - **Created:** 7/7/2026 - **Last Updated:** 7/7/2026 - **Visibility:** Public - **Stars:** 1 ## Key Components ### BT1 — [BH34AAW](https://www.flux.ai/jecstronic/bh34aaw~zq3.md) - Role Details: External 4xAA holder; wired in series with BT2 to make 6xAA pack feeding the board battery input. Not mounted on the PCB. - Manufacturer Name: MPD (Memory Protection Devices) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: BH34AAW - Role: Energy Storage - Exclude from PCB: true - Datasheet URL: https://www.memoryprotectiondevices.com/datasheets/BH34AAW-datasheet.pdf **Pins:** - NEGATIVE [pin -] - POSITIVE [pin +] ### BT2 — [BC2AAPC](https://www.flux.ai/vasy_skral/bc2aapc~866.md) - Role Details: External 2xAA holder; wired in series with BT1 to make 6xAA pack feeding the board battery input. Not mounted on the PCB. - Manufacturer Part Number: BC2AAPC - Exclude from PCB: true - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: MPD (Memory Protection Devices) - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1086/BC2AAPC.pdf - Role: Energy Storage **Pins:** - - [pin 2] - + [pin 1] ### D1 — [1N5822RLG](https://www.flux.ai/lcsc/1n5822rlg~v8yy.md) - Part Type: Schottky Barrier Diodes (SBD) - Role Details: Motor 1 flyback clamp, 3A/40V-class diode; cathode to +9V and anode to MOSFET drain. - JLCPCB Part Class: Extended Part - Role: Flyback / Freewheeling - Manufacturer Name: onsemi(安森美) - Package or Case Code: DO-201AD_BD5.3-L8.4-P12.50-D1.4-RD - Manufacturer Part Number: 1N5822RLG - LCSC Part Number: C232464 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010333_onsemi-1N5822RLG_C232464.pdf - Product Info Url: https://lcsc.com/product-detail/Others_ON-Semicon_1N5822RLG_ON-Semicon-ON-1N5822RLG_C232464.html **Pins:** - A [pin 2] - C [pin 1] ### D2 — [1N5822RLG](https://www.flux.ai/lcsc/1n5822rlg~v8yy.md) - Package or Case Code: DO-201AD_BD5.3-L8.4-P12.50-D1.4-RD - LCSC Part Number: C232464 - Manufacturer Part Number: 1N5822RLG - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010333_onsemi-1N5822RLG_C232464.pdf - Part Type: Schottky Barrier Diodes (SBD) - Role: Flyback / Freewheeling - JLCPCB Part Class: Extended Part - Manufacturer Name: onsemi(安森美) - Product Info Url: https://lcsc.com/product-detail/Others_ON-Semicon_1N5822RLG_ON-Semicon-ON-1N5822RLG_C232464.html - Role Details: Motor 2 flyback clamp, 3A/40V-class diode; cathode to +9V and anode to MOSFET drain. **Pins:** - A [pin 2] - C [pin 1] ### D3 — [1N5822RLG](https://www.flux.ai/lcsc/1n5822rlg~v8yy.md) - Role: Flyback / Freewheeling - Part Type: Schottky Barrier Diodes (SBD) - Manufacturer Name: onsemi(安森美) - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010333_onsemi-1N5822RLG_C232464.pdf - LCSC Part Number: C232464 - Manufacturer Part Number: 1N5822RLG - Package or Case Code: DO-201AD_BD5.3-L8.4-P12.50-D1.4-RD - Role Details: Motor 3 flyback clamp, 3A/40V-class diode; cathode to +9V and anode to MOSFET drain. - Product Info Url: https://lcsc.com/product-detail/Others_ON-Semicon_1N5822RLG_ON-Semicon-ON-1N5822RLG_C232464.html **Pins:** - A [pin 2] - C [pin 1] ### D4 — [1N5822RLG](https://www.flux.ai/lcsc/1n5822rlg~v8yy.md) - Role: Flyback / Freewheeling - Product Info Url: https://lcsc.com/product-detail/Others_ON-Semicon_1N5822RLG_ON-Semicon-ON-1N5822RLG_C232464.html - Manufacturer Name: onsemi(安森美) - JLCPCB Part Class: Extended Part - Part Type: Schottky Barrier Diodes (SBD) - Role Details: Motor 4 flyback clamp, 3A/40V-class diode; cathode to +9V and anode to MOSFET drain. - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010333_onsemi-1N5822RLG_C232464.pdf - LCSC Part Number: C232464 - Manufacturer Part Number: 1N5822RLG - Package or Case Code: DO-201AD_BD5.3-L8.4-P12.50-D1.4-RD **Pins:** - A [pin 2] - C [pin 1] ### J1 — [Raspberry Pi Pico](https://www.flux.ai/baronunread/raspberry-pi-pico~j7.md) - Manufacturer Name: Raspberry Pi - Role: Controller Socket - Part Type: Evaluation Boards - Datasheet URL: https://datasheets.raspberrypi.com/pico/pico-datasheet.pdf - Role Details: Raspberry Pi Pico seated connector; GP18-GP21 drive motor channels, GP0/GP1 UART to WiFi. - Manufacturer Part Number: SC0915 **Pins:** - ~RUN [pin 30] - 3V3_EN [pin 37] - 3V3_OUT [pin 36] - ADC_VREF [pin 35] - AGND [pin 33] - GND [pin 13] - GND [pin D2] - GND [pin 23] - GND [pin 28] - GND [pin 18] - GND [pin 3] - GND [pin 38] - GND [pin 8] - GP0 [pin 1] - GP1 [pin 2] - GP10 [pin 14] - GP11 [pin 15] - GP12 [pin 16] - GP13 [pin 17] - GP14 [pin 19] - GP15 [pin 20] - GP16 [pin 21] - GP17 [pin 22] - GP18 [pin 24] - GP19 [pin 25] - GP2 [pin 4] - GP20 [pin 26] - GP21 [pin 27] - GP22 [pin 29] - GP26 [pin 31] - GP27 [pin 32] - GP28 [pin 34] - GP3 [pin 5] - GP4 [pin 6] - GP5 [pin 7] - GP6 [pin 9] - GP7 [pin 10] - GP8 [pin 11] - GP9 [pin 12] - SWCLK [pin D1] - SWDIO [pin D3] - VBUS [pin 40] - VSYS [pin 39] ### J2 — [KF128-5.08-2P-AA](https://www.flux.ai/lcsc/kf128-5p08-2p-aa~0pbi.md) - Connector Rows: 1 - Manufacturer Part Number: KF128-5.08-2P-AA - Connector Positions: 2 - Part Type: Screw terminal - Role Details: Battery input terminal: connect 6xAA pack positive to pin 1 and pack negative to pin 2/GND. - LCSC Part Number: C474952 - JLCPCB Part Class: Extended Part - Package or Case Code: CONN-TH_P5.08_KF128-5.08-2P - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF128-5-08-2P_C474952.html - Connector Gender: Female - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2408211511_Cixi-Kefa-Elec-KF128-5-08-2P-AA_C474952.pdf - Role: Power Conversion - Manufacturer Name: KEFA(科发) - Connector Type: Screw terminal - Operating Temperature: -40℃~+105℃ - Current Rating: 24A - Connector Pitch: 5.08mm **Pins:** - 1 [pin 1] - 2 [pin 2] ### J3 — [KF128-5.08-2P-AA](https://www.flux.ai/lcsc/kf128-5p08-2p-aa~0pbi.md) - Package or Case Code: CONN-TH_P5.08_KF128-5.08-2P - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF128-5-08-2P_C474952.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2408211511_Cixi-Kefa-Elec-KF128-5-08-2P-AA_C474952.pdf - Connector Gender: Female - Current Rating: 24A - Role Details: Motor 1 9V output terminal controlled by Pico GP18. - Connector Pitch: 5.08mm - Manufacturer Name: KEFA(科发) - Connector Type: Screw terminal - Role: Motor Connector - Operating Temperature: -40℃~+105℃ - Manufacturer Part Number: KF128-5.08-2P-AA - Connector Positions: 2 - Connector Rows: 1 - Part Type: Screw terminal - LCSC Part Number: C474952 - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] ### J4 — [KF128-5.08-2P-AA](https://www.flux.ai/lcsc/kf128-5p08-2p-aa~0pbi.md) - JLCPCB Part Class: Extended Part - LCSC Part Number: C474952 - Role: Motor Connector - Part Type: Screw terminal - Manufacturer Part Number: KF128-5.08-2P-AA - Connector Positions: 2 - Connector Rows: 1 - Role Details: Motor 2 9V output terminal controlled by Pico GP19. - Current Rating: 24A - Connector Pitch: 5.08mm - Manufacturer Name: KEFA(科发) - Connector Type: Screw terminal - Operating Temperature: -40℃~+105℃ - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2408211511_Cixi-Kefa-Elec-KF128-5-08-2P-AA_C474952.pdf - Connector Gender: Female - Package or Case Code: CONN-TH_P5.08_KF128-5.08-2P - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF128-5-08-2P_C474952.html **Pins:** - 1 [pin 1] - 2 [pin 2] ### J5 — [KF128-5.08-2P-AA](https://www.flux.ai/lcsc/kf128-5p08-2p-aa~0pbi.md) - Role: Motor Connector - Connector Pitch: 5.08mm - Current Rating: 24A - Operating Temperature: -40℃~+105℃ - Manufacturer Name: KEFA(科发) - Connector Type: Screw terminal - Package or Case Code: CONN-TH_P5.08_KF128-5.08-2P - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF128-5-08-2P_C474952.html - Role Details: Motor 3 9V output terminal controlled by Pico GP20. - Connector Gender: Female - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2408211511_Cixi-Kefa-Elec-KF128-5-08-2P-AA_C474952.pdf - LCSC Part Number: C474952 - JLCPCB Part Class: Extended Part - Manufacturer Part Number: KF128-5.08-2P-AA - Connector Positions: 2 - Connector Rows: 1 - Part Type: Screw terminal **Pins:** - 1 [pin 1] - 2 [pin 2] ### J6 — [KF128-5.08-2P-AA](https://www.flux.ai/lcsc/kf128-5p08-2p-aa~0pbi.md) - Part Type: Screw terminal - Connector Positions: 2 - Manufacturer Part Number: KF128-5.08-2P-AA - Connector Rows: 1 - JLCPCB Part Class: Extended Part - LCSC Part Number: C474952 - Connector Gender: Female - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2408211511_Cixi-Kefa-Elec-KF128-5-08-2P-AA_C474952.pdf - Role Details: Motor 4 9V output terminal controlled by Pico GP21. - Role: Motor Connector - Product Info Url: https://lcsc.com/product-detail/New-Quadratic-Unclassified-Data_Cixi-Kefa-Elec-KF128-5-08-2P_C474952.html - Package or Case Code: CONN-TH_P5.08_KF128-5.08-2P - Current Rating: 24A - Connector Pitch: 5.08mm - Connector Type: Screw terminal - Manufacturer Name: KEFA(科发) - Operating Temperature: -40℃~+105℃ **Pins:** - 1 [pin 1] - 2 [pin 2] ### Q1 — [IRLZ44NPBF](https://www.flux.ai/jecstronic/irlz44npbf~kg9.md) - Manufacturer Part Number: IRLZ44NPBF - Role Details: Motor 1 low-side switch driven by Pico GP18 through gate resistor with pulldown. - Datasheet URL: https://www.mouser.com/datasheet/2/196/Infineon_IRLZ44N_DataSheet_v01_01_EN-3363447.pdf - Role: Switching - Manufacturer Name: Infineon Technologies - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor **Pins:** - D [pin 2] - G [pin 1] - S [pin 3] ### Q2 — [IRLZ44NPBF](https://www.flux.ai/jecstronic/irlz44npbf~kg9.md) - Manufacturer Part Number: IRLZ44NPBF - Datasheet URL: https://www.mouser.com/datasheet/2/196/Infineon_IRLZ44N_DataSheet_v01_01_EN-3363447.pdf - Role Details: Motor 2 low-side switch driven by Pico GP19 through gate resistor with pulldown. - Role: Switching - Manufacturer Name: Infineon Technologies - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D [pin 2] - G [pin 1] - S [pin 3] ### Q3 — [IRLZ44NPBF](https://www.flux.ai/jecstronic/irlz44npbf~kg9.md) - Role Details: Motor 3 low-side switch driven by Pico GP20 through gate resistor with pulldown. - License: https://creativecommons.org/licenses/by/4.0/ - Role: Switching - Part Type: Transistor - Manufacturer Name: Infineon Technologies - Datasheet URL: https://www.mouser.com/datasheet/2/196/Infineon_IRLZ44N_DataSheet_v01_01_EN-3363447.pdf - Manufacturer Part Number: IRLZ44NPBF **Pins:** - D [pin 2] - G [pin 1] - S [pin 3] ### Q4 — [IRLZ44NPBF](https://www.flux.ai/jecstronic/irlz44npbf~kg9.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Manufacturer Name: Infineon Technologies - Datasheet URL: https://www.mouser.com/datasheet/2/196/Infineon_IRLZ44N_DataSheet_v01_01_EN-3363447.pdf - Role Details: Motor 4 low-side switch driven by Pico GP21 through gate resistor with pulldown. - Role: Switching - Manufacturer Part Number: IRLZ44NPBF **Pins:** - D [pin 2] - G [pin 1] - S [pin 3] ### U1 — [ESP-01S](https://www.flux.ai/lcsc/esp-01s~7vns.md) - Manufacturer Part Number: ESP-01S - Package or Case Code: WIFIM-TH_8P-L24.7-W14.4-P2.54 - Manufacturer Name: Ai-Thinker(安信可) - JLCPCB Part Class: Extended Part - LCSC Part Number: C503582 - Role Details: 3.3V ESP-01S UART WiFi interface connected to Pico UART0 on GP0/GP1. - Role: Modulation / Demodulation - Part Type: WiFi Modules - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409231126_Ai-Thinker-ESP-01S_C503582.pdf - Product Info Url: https://lcsc.com/product-detail/WIFI-Modules_Ai-Thinker-ESP-01S_C503582.html **Pins:** - EN [pin 6] - GND [pin 1] - IO0 [pin 3] - IO2 [pin 2] - RST [pin 7] - RXD [pin 4] - TXD [pin 5] - VCC [pin 8] ### U2 — [LMR50410Y5FQDBVRQ1](https://www.flux.ai/adrian95/lmr50410y5fqdbvrq1~tdn.md) - Datasheet URL: https://www.ti.com/lit/ds/symlink/lmr50410-q1.pdf - Role: Power Conversion - Role Details: 9V input to 5V rail for Raspberry Pi Pico VSYS and WiFi 3.3V regulator input; sized for about 1A logic rail budget. - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - Symbol Style: parametric-v1 - Manufacturer Part Number: LMR50410Y5FQDBVRQ1 - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - CB [pin 1] - EN [pin 4] - FB [pin 3] - GND [pin 2] - SW [pin 6] - VIN [pin 5] ### U3 — [AP2112K-3.3TRG1](https://www.flux.ai/adrian95/ap2112k-33trg1~zlq.md) - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP2112.pdf - Part Type: Integrated Circuit - Symbol Style: parametric-v1 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Diodes Incorporated - Role: Power Conversion - Role Details: 5V to 3.3V regulator for ESP-01S WiFi module peak current. - Manufacturer Part Number: AP2112K-3.3TRG1 **Pins:** - EN [pin 3] - GND [pin 2] - NC [pin 4] - VIN [pin 1] - VOUT [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/dacre/remote-pico-controller~0n3](https://www.flux.ai/dacre/remote-pico-controller~0n3).* --- *Generated from [https://www.flux.ai/dacre/remote-pico-controller~0n3](https://www.flux.ai/dacre/remote-pico-controller~0n3)*