# GLECS V4 Motor Controller ## Description Industrial motor controller PCB with 12V relay switching zone isolated from STM32/4G LTE logic zone by a routed vertical isolation slot on a 150x100mm 2-layer FR4 board. ## Project Details - **Owner:** ayushpatel92 - **Created:** 6/10/2026 - **Last Updated:** 6/11/2026 - **Visibility:** Public ## Key Components ### D1 — [SM6T12A](https://www.flux.ai/jecstronic/sm6t12a~mln.md) - Manufacturer Name: STMicroelectronics - Datasheet URL: https://www.mouser.com/datasheet/2/389/sm6t100a-1916590.pdf - Manufacturer Part Number: SM6T12A - Role: Protection - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### F1 — [SMD1812P050TF/30](https://www.flux.ai/cherepanyadima/smd1812p050tf30~a1.md) - Role Details: Existing 500mA PTC is undersized for LTE buck input; replace with ≥30V, ≥2A hold PTC before manufacturing if LTE transmit is enabled. - Role: Protection - Manufacturer Part Number: C12559 - Datasheet URL: https://www.lcsc.com/datasheet/C12559.pdf - Manufacturer Name: RUILON - Part Type: Protection - Current Rating: 0.5A **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [PJ-051AH](https://www.flux.ai/lcsc/pj-051ah~wnf4.md) - LCSC Part Number: C22359773 - Manufacturer Name: CUI - Role: 12V DC Barrel Power Input - Package or Case Code: DC-IN-TH_PJ-051AH - Manufacturer Part Number: PJ-051AH - JLCPCB Part Class: Extended Part - Role Details: Original PJ-051AH barrel jack; center pin feeds F1/12V_IN_RAW and sleeve/switch tied to GND **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] ### J2 — [XY301V-A-5.0-3P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-3p~ox.md) - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2411121455_Ningbo-Xinlaiya-Elec--XY301V-A-5-0-3P_C557652.pdf - Manufacturer Name: Ningbo Xinlaiya Elec. - Connector Pitch: 5.0mm (library alternative to requested 5.08mm) - Manufacturer Part Number: XY301V-A-5.0-3P - Role: Screw Terminal **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] - PIN3 [pin 3] ### J3 — [XY301V-A-5.0-3P](https://www.flux.ai/jharwinbarrozo/xy301v-a-50-3p~ox.md) - Manufacturer Name: Ningbo Xinlaiya Elec. - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2411121455_Ningbo-Xinlaiya-Elec--XY301V-A-5-0-3P_C557652.pdf - Connector Pitch: 5.0mm (library alternative to requested 5.08mm) - Role: Screw Terminal - Manufacturer Part Number: XY301V-A-5.0-3P **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] - PIN3 [pin 3] ### J4 — [SMA-J-P-H-ST-EM1](https://www.flux.ai/jecstronic/sma-j-p-h-st-em1~0a1.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Antenna Connector - Controlled Impedance: 50 ohm RF path required - Datasheet URL: http://suddendocs.samtec.com/catalog_english/sma.pdf - Part Type: Connector - Manufacturer Name: Samtec Inc. - Manufacturer Part Number: SMA-J-P-H-ST-EM1 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J5 — [Pin Header 01x04 2.54mm Vertical i2c](https://www.flux.ai/hasanbasri93/pin-header-01x04-2p54mm-vertical-i2c~37.md) - Role: OLED Header - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 5V [pin 1] - GND [pin 2] - SCL [pin 4] - SDA [pin 3] ### J6 — [Pin Header 01x06 2.54mm PROGRAMMING CONNECTOR](https://www.flux.ai/zalak201285/pin-header-01x06-2p54mm-programming-connector~ji.md) - Part Type: Connector - Role Details: SWD header: JTMS pin is SWDIO_PA13, JTCK pin is SWCLK_PA14, RESET is MCU_RESET, NJTRST tied to GND, JTDO optional SWO/PB3. - Role: SWD Header - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - JTCK [pin 2] - JTDI [pin 1] - JTDO [pin 3] - JTMS [pin 4] - NJTRST [pin 5] - RESET [pin 6] ### K1 — [SRD-12VDC-SL-C](https://www.flux.ai/jecstronic/srd-12vdc-sl-c~ofu.md) - Manufacturer Part Number: SRD-12VDC-SL-C - License: https://creativecommons.org/licenses/by/4.0/ - Role: Relay - Manufacturer Name: Ningbo Songle Relay - Part Type: Relay - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304140030_Ningbo-Songle-Relay-SRD-12VDC-SL-C_C30431.pdf **Pins:** - COIL1 [pin COIL1] - COIL2 [pin COIL2] - COM [pin COM] - NC [pin NC] - NO [pin NO] ### SW1 — [6x6mm micro tactile switch](https://www.flux.ai/jecstronic/6x6mm-micro-tactile-switch~igw.md) - Part Type: Switch - Purchase Url: https://shopee.ph/20Pcs-Micro-Tactile-Switch-Momentary-Tact-DIP-Switch-2Pin-6-X-6mm-Micro-Touch-Push-Button-Switch-High-5mm-6mm-7mm-8mm-9mm-i.1018846655.22773354064?sp_atk=2b55ff5c-bbfc-4967-b7e3-adb8c93c34e2&xptdk=2b55ff5c-bbfc-4967-b7e3-adb8c93c34e2&is_from_login=true - Role: Reset Button **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [AMS1117-5.0](https://www.flux.ai/adrian95/ams1117-50~r3b.md) - Role Details: Thermally unsuitable for LTE load; documented as design risk - Role: Voltage Regulator - Manufacturer Part Number: AMS1117-5.0 - Manufacturer Name: ams - Part Type: Integrated Circuit - Datasheet URL: https://www.snapeda.com/parts/AMS1117-5.0/Advanced%20Monolithic%20Systems/datasheet/ - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - GND [pin 1] - VI [pin 3] - VO [pin 2] ### U2 — [STM32 Blue Pill Breakout](https://www.flux.ai/vasyl/stm32-blue-pill-breakout~5gl.md) - Role: MCU Module - Manufacturer Part Number: Blue Pill - Manufacturer Name: ST-Microelectronics - Datasheet URL: https://components101.com/sites/default/files/component_datasheet/STM32F103C8T6-Blue-Pill-Development-Board-Datasheet.pdf - Role Details: STM32 Blue Pill module; SWD uses physical PA13/SWDIO and PA14/SWCLK pads. Current library symbol exposes programming header nets but not PA13/PA14 terminals directly. - Part Type: Breakout board **Pins:** - 3V3 [pin 20] - 3V3 [pin 38] - 5V [pin 18] - GND [pin 40] - GND [pin 19] - GND [pin 39] - PA0 [pin 25] - PA1 [pin 26] - PA10 [pin 7] - PA11 [pin 8] - PA12 [pin 9] - PA15 [pin 10] - PA2 [pin 27] - PA3 [pin 28] - PA4 [pin 29] - PA5 [pin 30] - PA6 [pin 31] - PA7 [pin 32] - PA8 [pin 5] - PA9 [pin 6] - PB0 [pin 33] - PB1 [pin 34] - PB10 [pin 35] - PB11 [pin 36] - PB12 [pin 1] - PB13 [pin 2] - PB14 [pin 3] - PB15 [pin 4] - PB3 [pin 11] - PB4 [pin 12] - PB5 [pin 13] - PB6 [pin 14] - PB7 [pin 15] - PB8 [pin 16] - PB9 [pin 17] - PC13 [pin 22] - PC14 [pin 23] - PC15 [pin 24] - RST [pin 37] - VBat [pin 21] ### U3 — [A7672SA LASE_](https://www.flux.ai/cherepanyadima/a7672sa-lase~7n.md) - Manufacturer Name: SIMCom Wireless Solutions Limited - Manufacturer Part Number: A7672S - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/7559/A7672SA.pdf - Role: Cellular Module - Part Type: RF Transceiver - Symbol Style: Parametric - Power Requirements: Requires high-current VBAT supply with multi-amp TX bursts; not safe from 500mA fused AMS1117 rail **Pins:** - ~PWRKEY [pin 1] - ~RESET [pin 16] - 1PPS [pin 100] - 1V8_GNSS [pin 97] - ADC [pin 25] - BT_ANT [pin 93] - CAM_I2C_SCL [pin 118] - CAM_I2C_SDA [pin 117] - CAM_MCLK [pin 121] - CAM_PWDN [pin 119] - CAM_RST [pin 120] - CAM_SPI_CLK [pin 124] - CAM_SPI_D0 [pin 122] - CAM_SPI_D1 [pin 123] - CTS [pin 7] - DCD [pin 5] - DTR [pin 3] - EAR_N [pin 41] - EAR_P [pin 40] - GND_1 [pin 2] - GND_1__1 [pin 17] - GND_1__10 [pin 61] - GND_1__11 [pin 62] - GND_1__12 [pin 63] - GND_1__13 [pin 64] - GND_1__14 [pin 65] - GND_1__2 [pin 18] - GND_1__3 [pin 29] - GND_1__4 [pin 39] - GND_1__5 [pin 45] - GND_1__6 [pin 46] - GND_1__7 [pin 54] - GND_1__8 [pin 58] - GND_1__9 [pin 59] - GND_2 [pin 69] - GND_2__1 [pin 70] - GND_2__10 [pin 79] - GND_2__11 [pin 80] - GND_2__12 [pin 81] - GND_2__13 [pin 82] - GND_2__14 [pin 83] - GND_2__2 [pin 71] - GND_2__3 [pin 72] - GND_2__4 [pin 73] - GND_2__5 [pin 74] - GND_2__6 [pin 75] - GND_2__7 [pin 76] - GND_2__8 [pin 77] - GND_2__9 [pin 78] - GND_3 [pin 84] - GND_3__1 [pin 85] - GND_3__2 [pin 86] - GND_3__3 [pin 87] - GND_3__4 [pin 88] - GND_3__5 [pin 89] - GND_3__6 [pin 91] - GND_3__7 [pin 92] - GND_3__8 [pin 94] - GNSS_ANT [pin 90] - GNSS_PWRCTL [pin 98] - GNSS_RXD [pin 96] - GNSS_TXD [pin 95] - GNSS_VBKP [pin 116] - GPIO1 [pin 19] - GPIO2 [pin 26] - GPIO3 [pin 48] - GPIO4 [pin 53] - I2C_SCL [pin 38] - I2C_SDA [pin 37] - LCD_BL_PWM [pin 101] - LCD_DCX [pin 107] - LCD_RST [pin 106] - LCD_SPI_CLK [pin 102] - LCD_SPI_CS [pin 105] - LCD_SPI_RXD [pin 104] - LCD_SPI_TXD [pin 103] - MIC_N [pin 43] - MIC_P [pin 42] - MK_IN_2 [pin 47] - MK_IN_3 [pin 20] - MK_IN_5 [pin 68] - MK_IN_6/I2C3_SCL [pin 36] - MK_OUT_2 [pin 44] - MK_OUT_3 [pin 21] - MK_OUT_5 [pin 67] - MK_OUT_6/I2C3_SDA [pin 35] - NC [pin 113] - NC__1 [pin 114] - NC__2 [pin 115] - NETLIGHT [pin 52] - RF_ANT [pin 60] - RI [pin 4] - RTS [pin 8] - RXD [pin 10] - SPI_CLK [pin 11] - SPI_CS [pin 12] - SPI_MISO [pin 14] - SPI_MOSI [pin 13] - STATUS [pin 66] - TXD [pin 9] - UART_LOG_RX [pin 22] - UART_LOG_TX [pin 23] - UART3_RXD [pin 49] - UART3_TXD [pin 50] - USB_BOOT [pin 6] - USB_DM [pin 28] - USB_DP [pin 27] - USIM1_CLK [pin 32] - USIM1_DATA [pin 31] - USIM1_DET [pin 34] - USIM1_RST [pin 33] - USIM1_VDD [pin 30] - USIM2_CLK [pin 109] - USIM2_DATA [pin 108] - USIM2_DET [pin 112] - USIM2_RST [pin 111] - USIM2_VDD [pin 110] - VBAT [pin 55] - VBAT__1 [pin 56] - VBAT__2 [pin 57] - VBAT_ADC [pin 51] - VBUS [pin 24] - VDD_1V8 [pin 15] - VDD_2V8 [pin 99] ### U4 — [PC817](https://www.flux.ai/kicad-part-library/pc817~0c.md) - Package or Case Code: DIP-4_W7.62mm - Datasheet URL: http://www.soselectronic.cz/a_info/resource/d/pc817.pdf - Role: Optocoupler - Manufacturer Part Number: PC817 **Pins:** - ~ [pin 1] - ~ [pin 3] - ~ [pin 2] - ~ [pin 4] ### U5 — [ULN2003A](https://www.flux.ai/jecstronic/uln2003a~v8w.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor Array - Manufacturer Name: STMicroelectronics - Role: Relay Driver - Manufacturer Part Number: ULN2003A - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/f3/6e/c8/64/4d/b3/4e/38/CD00001244.pdf/files/CD00001244.pdf/jcr:content/translations/en.CD00001244.pdf **Pins:** - COM [pin 9] - GND [pin 8] - I1 [pin 1] - I2 [pin 2] - I3 [pin 3] - I4 [pin 4] - I5 [pin 5] - I6 [pin 6] - I7 [pin 7] - O1 [pin 16] - O2 [pin 15] - O3 [pin 14] - O4 [pin 13] - O5 [pin 12] - O6 [pin 11] - O7 [pin 10] ### U6 — [DS18B20+](https://www.flux.ai/adrian95/ds18b20plus~f15.md) - Role: Temperature Sensor - Manufacturer Name: Analog Devices Inc./Maxim Integrated - Datasheet URL: https://www.analog.com/media/en/technical-documentation/data-sheets/ds18b20.pdf - Manufacturer Part Number: DS18B20+ - Part Type: Sensor - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - DQ [pin 2] - GND [pin 1] - VDD [pin 3] ### U7 — [DHT22](https://www.flux.ai/vasy_skral/dht22~ju8.md) - Symbol Style: Parametric - Manufacturer Name: Asair - Datasheet URL: https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf - Package or Case Code: Module - Role: Humidity Temperature Sensor - Part Type: Sensor - Manufacturer Part Number: DHT22 - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - DATA [pin 2] - GND [pin 4] - NULL [pin 3] - VDD [pin 1] ### U8 — [ACS724LLCTR-20AB-T](https://www.flux.ai/vasy_skral/acs724llctr-20ab-t~sk2.md) - Role Details: Flux library did not find exact ACS712-20A; using ACS724 20A Hall-effect analog alternative - Part Type: Integrated Circuit - Datasheet URL: https://www.allegromicro.com/~/media/Files/Datasheets/ACS724-Datasheet.ashx - Manufacturer Name: Allegro MicroSystems - Manufacturer Part Number: ACS724LLCTR-20AB-T - Role: Current Sensor **Pins:** - FILTER [pin 6] - GND [pin 5] - IP- [pin 3] - IP- [pin 4] - IP+ [pin 1] - IP+ [pin 2] - VCC [pin 8] - VIOUT [pin 7] ### U9 — [LMR33630BDDAR](https://www.flux.ai/lcsc/lmr33630bddar~o51d.md) - Part Type: DC-DC Converters - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL-EP2.8-1 - LCSC Part Number: C544370 - JLCPCB Part Class: Extended Part - Role: LTE VBAT Buck Regulator - Manufacturer Name: TI(德州仪器) - Role Details: 12V_PROTECTED to LTE_4V_VBAT, 3A buck sized for A7672S transmit bursts - Datasheet URL: https://www.ti.com/lit/ds/symlink/lmr33630.pdf - Manufacturer Part Number: LMR33630BDDAR **Pins:** - BOOT [pin 7] - EN [pin 3] - EP [pin 9] - FB [pin 5] - PG [pin 4] - PGND [pin 1] - SW [pin 8] - VCC [pin 6] - VIN [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ayushpatel92/glecs-v4-motor-controller~73](https://www.flux.ai/ayushpatel92/glecs-v4-motor-controller~73).* --- *Generated from [https://www.flux.ai/ayushpatel92/glecs-v4-motor-controller~73](https://www.flux.ai/ayushpatel92/glecs-v4-motor-controller~73)*