# Dual Well Pump Controller ## Description Controller for two low-producing water wells that meters pump runtime/volume into an above-ground tank and inhibits pumping when an external tank-full float switch is active. ## Project Details - **Owner:** jasonmcbrayer - **Created:** 5/22/2026 - **Last Updated:** 6/3/2026 - **Visibility:** Public ## Key Components ### D10 — SPHV24-01ETG-C - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Tank float input transient clamp - Manufacturer Name: Littelfuse Inc. - Manufacturer Part Number: SPHV24-01ETG-C - Role: TVS Protection - Part Type: Diode - Datasheet URL: https://www.verical.com/datasheet/littelfuse-tvs-SPHV24-01ETG-C-879122.pdf **Pins:** - A [pin 2] - C [pin 1] ### D11 — SPHV24-01ETG-C - Role: TVS Protection - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Littelfuse Inc. - Manufacturer Part Number: SPHV24-01ETG-C - Role Details: Aux field input transient clamp - Datasheet URL: https://www.verical.com/datasheet/littelfuse-tvs-SPHV24-01ETG-C-879122.pdf - Part Type: Diode **Pins:** - A [pin 2] - C [pin 1] ### D12 — SK36A-LTP - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SK36A-LTP - Manufacturer Name: Micro Commercial Co - Part Type: Diode - Role: Flyback Diode - Role Details: 60 V 3 A Schottky diode across 24 VDC contactor coil output - Datasheet URL: https://www.mccsemi.com/pdf/Products/SK32A-L-SK310A-L(DO-214AC).pdf **Pins:** - A [pin 2] - K [pin 1] ### D8 — SPHV24-01ETG-C - Role Details: 24 VDC input transient clamp - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Littelfuse Inc. - Manufacturer Part Number: SPHV24-01ETG-C - Role: TVS Protection - Part Type: Diode - Datasheet URL: https://www.verical.com/datasheet/littelfuse-tvs-SPHV24-01ETG-C-879122.pdf **Pins:** - A [pin 2] - C [pin 1] ### D9 — SPHV24-01ETG-C - Role Details: Field pulse input transient clamp - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Littelfuse Inc. - Role: TVS Protection - Manufacturer Part Number: SPHV24-01ETG-C - Datasheet URL: https://www.verical.com/datasheet/littelfuse-tvs-SPHV24-01ETG-C-879122.pdf - Part Type: Diode **Pins:** - A [pin 2] - C [pin 1] ### J1 — TerminalBlock-01x02P-5.00mm - Role: Power Input Connector - Connector Positions: 2 - Manufacturer Part Number: 691137710002 - Part Type: Connector - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Connector Pitch: 5mm - Manufacturer Name: Würth Elektronik - Role Details: 24 VDC field power input; no 240 VAC routed on PCB **Pins:** - P1 [pin 2] - P2 [pin 1] ### J2 — TerminalBlock-01x02P-5.00mm - Part Type: Connector - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Connector Positions: 2 - Connector Pitch: 5mm - Manufacturer Name: Würth Elektronik - Role: Contactor Coil Connector - Role Details: Connects to external motor-rated contactor coil only, not pump mains - Manufacturer Part Number: 691137710002 **Pins:** - P1 [pin 2] - P2 [pin 1] ### J3 — TerminalBlock-01x02P-5.00mm - Part Type: Connector - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Role Details: Dry-contact or open-collector pulse input for pump-line or tank outlet water meter - Connector Positions: 2 - Manufacturer Name: Würth Elektronik - Manufacturer Part Number: 691137710002 - Role: Flow Meter Input - Connector Pitch: 5mm **Pins:** - P1 [pin 2] - P2 [pin 1] ### J4 — TerminalBlock-01x02P-5.00mm - Connector Positions: 2 - Manufacturer Part Number: 691137710002 - Role Details: Normally-open dry-contact tank-full float input; firmware treats active/full as pump inhibit - Connector Pitch: 5mm - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Part Type: Connector - Role: Float Switch Input - Manufacturer Name: Würth Elektronik **Pins:** - P1 [pin 2] - P2 [pin 1] ### J5 — TerminalBlock-01x02P-5.00mm - Connector Pitch: 5mm - Connector Positions: 2 - Manufacturer Part Number: 691137710002 - Role Details: Configurable dry-contact input for dry-run protection, manual disable, or outlet meter - Part Type: Connector - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Role: Auxiliary Input - Manufacturer Name: Würth Elektronik **Pins:** - P1 [pin 2] - P2 [pin 1] ### J6 — USB-C 2.0 Receptacle - Purchase Url: https://www.digikey.com/en/products/detail/gct/USB4105-GF-A/11198441 - Datasheet URL: https://gct.co/files/drawings/usb4105.pdf - Part Type: USB C - Role: USB Programming Connector - Role Details: Native USB data connection for ESP32-S3 programming/debug; not primary power input - Symbol Style: parametric-v1 - Manufacturer Part Number: USB4105-GF-A - Manufacturer Name: GTC **Pins:** - CC1 [pin 6] - CC2 [pin 12] - D- [pin 7] - D- [pin 9] - D+ [pin 10] - D+ [pin 8] - GND [pin 1] - GND [pin 16] - GND [pin 15] - GND [pin 2] - SBU1 [pin 11] - SBU2 [pin 5] - VBUS [pin 3] - VBUS [pin 14] - VBUS [pin 4] - VBUS [pin 13] ### SW1 — SWITCH-PUSH-6mm-H5mm-4pin - Role: User Button - Datasheet URL: https://datasheet.lcsc.com/lcsc/2304140030_XUNPU-TS-1002-10026_C455101.pdf - Manufacturer Part Number: TS-1002-10026 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: XUNPU - Role Details: Local menu/select input - Part Type: Switch **Pins:** - 1-1 [pin 1-1] - 1-2 [pin 1-2] - 2-1 [pin 2-1] - 2-2 [pin 2-2] ### SW2 — SWITCH-PUSH-6mm-H5mm-4pin - Part Type: Switch - Role: User Button - Manufacturer Name: XUNPU - Role Details: Local up/increase input - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TS-1002-10026 - Datasheet URL: https://datasheet.lcsc.com/lcsc/2304140030_XUNPU-TS-1002-10026_C455101.pdf **Pins:** - 1-1 [pin 1-1] - 1-2 [pin 1-2] - 2-1 [pin 2-1] - 2-2 [pin 2-2] ### SW3 — SWITCH-PUSH-6mm-H5mm-4pin - Datasheet URL: https://datasheet.lcsc.com/lcsc/2304140030_XUNPU-TS-1002-10026_C455101.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: User Button - Manufacturer Part Number: TS-1002-10026 - Manufacturer Name: XUNPU - Part Type: Switch - Role Details: Local down/decrease input **Pins:** - 1-1 [pin 1-1] - 1-2 [pin 1-2] - 2-1 [pin 2-1] - 2-2 [pin 2-2] ### SW4 — SWITCH-PUSH-6mm-H5mm-4pin - Manufacturer Name: XUNPU - Part Type: Switch - Role Details: Momentary reset button pulls EN low - Datasheet URL: https://datasheet.lcsc.com/lcsc/2304140030_XUNPU-TS-1002-10026_C455101.pdf - Manufacturer Part Number: TS-1002-10026 - Role: Reset Button - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1-1 [pin 1-1] - 1-2 [pin 1-2] - 2-1 [pin 2-1] - 2-2 [pin 2-2] ### SW5 — SWITCH-PUSH-6mm-H5mm-4pin - Datasheet URL: https://datasheet.lcsc.com/lcsc/2304140030_XUNPU-TS-1002-10026_C455101.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Momentary boot/download button pulls GPIO0 low - Role: Boot Button - Manufacturer Name: XUNPU - Part Type: Switch **Pins:** - 1-1 [pin 1-1] - 1-2 [pin 1-2] - 2-1 [pin 2-1] - 2-2 [pin 2-2] ### U1 — ESP32-S3-WROOM-1-N16R8 - Manufacturer Part Number: ESP32-S3-WROOM-1-N16R8 - Part Type: Module - Role Details: Universal node controller; ESP32-S3 3.3 V WiFi module with native USB - Datasheet URL: https://www.mouser.com/datasheet/2/891/esp32_s3_wroom_1_wroom_1u_datasheet_en-2930317.pdf - Manufacturer Name: Espressif Systems - Symbol Style: parametric-v1 - License: https://creativecommons.org/licenses/by/4.0/ - Role: WiFi MCU **Pins:** - 3V3 [pin 2] - EN [pin 3] - GND_1 [pin 1] - GND_10 [pin 48] - GND_11 [pin 49] - GND_2 [pin 40] - GND_3 [pin 41] - GND_4 [pin 42] - GND_5 [pin 43] - GND_6 [pin 44] - GND_7 [pin 45] - GND_8 [pin 46] - GND_9 [pin 47] - IO0 [pin 27] - IO1 [pin 39] - IO10 [pin 18] - IO11 [pin 19] - IO12 [pin 20] - IO13 [pin 21] - IO14 [pin 22] - IO15 [pin 8] - IO16 [pin 9] - IO17 [pin 10] - IO18 [pin 11] - IO19 [pin 13] - IO2 [pin 38] - IO20 [pin 14] - IO21 [pin 23] - IO3 [pin 15] - IO35 [pin 28] - IO36 [pin 29] - IO37 [pin 30] - IO38 [pin 31] - IO39 [pin 32] - IO4 [pin 4] - IO40 [pin 33] - IO41 [pin 34] - IO42 [pin 35] - IO45 [pin 26] - IO46 [pin 16] - IO47 [pin 24] - IO48 [pin 25] - IO5 [pin 5] - IO6 [pin 6] - IO7 [pin 7] - IO8 [pin 12] - IO9 [pin 17] - RXD0 [pin 36] - TXD0 [pin 37] ### U2 — AP63203WU-7 - Part Type: Integrated Circuit - Role: Buck Regulator - Role Details: 24 VDC input to 3.3 V rail; sized for ESP32 0.5 A supply requirement plus UI margin - Manufacturer Name: Diodes Incorporated - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP63200-AP63201-AP63203-AP63205.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AP63203WU-7 **Pins:** - BST [pin 6] - EN [pin 2] - FB [pin 1] - GND [pin 4] - SW [pin 5] - VIN [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/jasonmcbrayer/dual-well-pump-controller~88](https://www.flux.ai/jasonmcbrayer/dual-well-pump-controller~88).* --- *Generated from [https://www.flux.ai/jasonmcbrayer/dual-well-pump-controller~88](https://www.flux.ai/jasonmcbrayer/dual-well-pump-controller~88)*