# GLECS V4 Logic Controller ## Description STM32F103-based GLECS V4 pure logic controller with 12V input power tree, onboard 4G module, isolated relay control zone, sensors, OLED, debug headers, and 200x140mm two-layer PCB requirements. ## Project Details - **Owner:** ayushqqq123 - **Created:** 6/12/2026 - **Last Updated:** 6/16/2026 - **Visibility:** Public ## Key Components ### D_STATUS — [L-53ID](https://www.flux.ai/lcsc/l-53id~yseu.md) - LCSC Part Number: C598429 - Manufacturer Part Number: L-53ID - Role: Indicator - Datasheet URL: https://www.lcsc.com/datasheet/C598429.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlVZVVIFFgBeVAVTT1BXUgFfEwJeVlBfEwVcAlMHRAQxVlNeR1RXVVVXT1leVTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Manufacturer Name: Kingbright - Part Type: LED - Package or Case Code: LED-TH_BD5.9-P2.54-RD_RED - JLCPCB Part Class: Extended Part - Role Details: MCU-driven status LED **Pins:** - - [pin 1] - + [pin 2] ### D_TVS — [P6KE15A](https://www.flux.ai/adrian95/p6ke15a~2b4.md) - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/1a/3b/f2/a9/96/72/49/ca/CD00000720.pdf/files/CD00000720.pdf/jcr:content/translations/en.CD00000720.pdf - Role: Protection - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode - Manufacturer Part Number: P6KE15A - Manufacturer Name: STMicroelectronics - Role Details: 15V TVS diode across protected 12V input to GND_STAR. **Pins:** - A [pin 2] - K [pin 1] ### D2 — [1N4007](https://www.flux.ai/jecstronic/1n4007~7vb.md) - Datasheet URL: https://www.nteinc.com/specs/original/1N4001_07.pdf - Role: Flyback - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode - Role Details: Cathode to VCC_12V_RELAY, anode to Q1 collector / relay coil low side. - Manufacturer Name: NTE Electronics, Inc - Manufacturer Part Number: 1N4007 **Pins:** - anode [pin 2] - cathode [pin 1] ### J_ANT — [U.FL-R-SMT(01)](https://www.flux.ai/adrian95/upfl-r-smt01~ap.md) - Manufacturer Part Number: U.FL-R-SMT(01) - Manufacturer Name: Hirose Electric Co Ltd - Role: RF Connector - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/2607/UFL%20Series.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 50 ohm LTE antenna connector with keepout - Part Type: Connector **Pins:** - GND [pin 2] - GND [pin 1] - SIG [pin 3] ### J_CT — [236-103](https://www.flux.ai/cherepanyadima/236-103~a5.md) - Manufacturer Part Number: 236-103 - Datasheet URL: https://wago.priintcloud.com/datasheets/236-103/en/ - Role Details: External CT module input: L1=3.3V, L2=ADC signal to STM32 PA1, L3=GND_STAR - Role: Current Transformer Module Connector - Part Type: Connector - Manufacturer Name: Wago **Pins:** - ~ [pin L3] - ~ [pin L2] - ~ [pin L1] ### J_PWR — [DC-005](https://www.flux.ai/cherepanyadima/dc-005.md) - Datasheet URL: https://www.snapeda.com/parts/DC-005/Best%20Inc./datasheet/ - Manufacturer Part Number: DC-005 - Manufacturer Name: Best Inc - Part Type: Connectors - Role: Power Input - Role Details: 12V DC INPUT, 5.5mm/2.1mm center-positive barrel jack. **Pins:** - ~ [pin 2] - ~ [pin 4] - ~ [pin 3] ### J_RELAY_CONTACT — [236-103](https://www.flux.ai/cherepanyadima/236-103~a5.md) - Manufacturer Name: Wago - Part Type: Connector - Manufacturer Part Number: 236-103 - Datasheet URL: https://wago.priintcloud.com/datasheets/236-103/en/ - Role: Relay Contact Connector - Role Details: Starter coil relay contacts COM/NO/NC **Pins:** - ~ [pin L3] - ~ [pin L2] - ~ [pin L1] ### J_S1 — [236-102](https://www.flux.ai/cherepanyadima/236-102~pe.md) - Connector Type: Screw Terminal - Part Type: Connector - Datasheet URL: https://wago.priintcloud.com/datasheets/236-102/en/ - Connector Positions: 2 - Role Details: S1 2-pin screw terminal: SIGNAL to MCU input, GND return; no 3.3V power pin - Manufacturer Name: https://wago.priintcloud.com/datasheets/236-102/en/ - Symbol Style: Parametric - Role: Dry-contact Sensor Input Connector - Manufacturer Part Number: 236-102 **Pins:** - ~ [pin L1] - ~ [pin L2] ### J_S2 — [236-102](https://www.flux.ai/cherepanyadima/236-102~pe.md) - Part Type: Connector - Role Details: S2 2-pin screw terminal: SIGNAL to MCU input, GND return; no 3.3V power pin - Connector Positions: 2 - Manufacturer Part Number: 236-102 - Manufacturer Name: https://wago.priintcloud.com/datasheets/236-102/en/ - Symbol Style: Parametric - Role: Dry-contact Sensor Input Connector - Datasheet URL: https://wago.priintcloud.com/datasheets/236-102/en/ - Connector Type: Screw Terminal **Pins:** - ~ [pin L1] - ~ [pin L2] ### J_SIM — [2452796-1](https://www.flux.ai/adrian95/2452796-1.md) - Manufacturer Name: TE Connectivity - Symbol Style: parametric-v1 - Part Type: Connector - Manufacturer Part Number: 2452796-1 - Role Details: Nano SIM holder connected to U_LTE SIM1. VPP/C6 is intentionally unused for modern SIM cards; ERC power warning on J_SIM:VPP is accepted and documented in erc-waivers. - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocFormat=pdf&DocLang=English&DocNm=2452796&DocType=Customer+Drawing&PartCntxt=2452796-1 - License: https://creativecommons.org/licenses/by/4.0/ - Role: SIM Connector **Pins:** - CLK [pin C3] - DETECTION_SWITCH [pin SW1] - GND [pin C5] - GROUND_1 [pin G1] - GROUND_2 [pin G2] - GROUND_3 [pin G3] - I/O [pin C7] - RST [pin C2] - VCC [pin C1] - VPP [pin C6] ### J_SWD — [TSW-105-07-G-S](https://www.flux.ai/adrian95/tsw-105-07-g-s~klw.md) - Role: Programming Connector - Datasheet: https://suddendocs.samtec.com/productspecs/tsw-sxx.pdf - Manufacturer Part Number: TSW-105-07-G-S - Datasheet URL: https://suddendocs.samtec.com/catalog_english/tsw_th.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Samtec - Role Details: SWDIO, SWCLK, NRST, 3V3, GND - Part Type: Connector **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] ### J_UART — [TSW-103-07-G-S](https://www.flux.ai/adrian95/tsw-103-07-g-s~876.md) - Role: Debug Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TSW-103-07-G-S - Manufacturer Name: Samtec Inc. - Role Details: UART1 TX/RX/GND debug header - Part Type: Connector - Datasheet URL: https://suddendocs.samtec.com/prints/tsw-xxx-xx-x-x-xx-xxx-footprint.pdf **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J_VSENSE — [236-103](https://www.flux.ai/cherepanyadima/236-103~a5.md) - Manufacturer Name: Wago - Part Type: Connector - Datasheet URL: https://wago.priintcloud.com/datasheets/236-103/en/ - Manufacturer Part Number: 236-103 - Role: Voltage Sensor Module Connector - Role Details: External ZMPT101B module input: L1=3.3V, L2=ADC signal to STM32 PA4, L3=GND_STAR **Pins:** - ~ [pin L3] - ~ [pin L2] - ~ [pin L1] ### K1 — [SRD-12VDC-SL-C](https://www.flux.ai/jecstronic/srd-12vdc-sl-c~ofu.md) - Role: Relay - Role Details: 12V SPDT relay, contacts to starter coil command terminal. - Manufacturer Part Number: SRD-12VDC-SL-C - License: https://creativecommons.org/licenses/by/4.0/ - 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] ### Q1 — [BC547](https://www.flux.ai/adrian95/bc547~ejc.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/ON%20Semiconductor%20PDFs/BC546-50.pdf - Manufacturer Part Number: BC547 - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: onsemi - Role: Driver - Role Details: Low-side NPN driver for K1 coil in GND_RELAY domain. **Pins:** - B [pin 2] - C [pin 1] - E [pin 3] ### TP_RESET — [1040](https://www.flux.ai/cherepanyadima/1040~lm.md) - Role: Test Point - Role Details: MCU_NRST measurement and manual reset access - Manufacturer Part Number: 1040 - Manufacturer Name: Keystone - Part Type: Connectors - Datasheet URL: https://www.keyelco.com/userAssets/file/K75p63.pdf **Pins:** - TP [pin TP] ### U_3V3 — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33~34.md) - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AMS1117-3.3 - Datasheet URL: http://www.advanced-monolithic.com/pdf/ds1117.pdf - Role Details: 5V to 3.3V LDO for STM32 VDD/VDDA and 3.3V references. - Symbol Style: Parametric - Role: Regulator - Manufacturer Name: AMS **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] ### U_4V — [LMR33630ADDA](https://www.flux.ai/lcsc/lmr33630adda~mf4w.md) - Part Type: DC-DC Converters - Symbol Style: parametric-v1 - Role Details: 4.0V LTE buck; TI datasheet indicates 100k/33.2k feedback for 4.0V, not 100k/51.1k. - JLCPCB Part Class: Extended Part - Package or Case Code: ESOP-8_L4.9-W3.9-P1.27-LS6.0-BL-EP-1 - Datasheet URL: https://www.ti.com/lit/ds/symlink/lmr33630.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1780495101449&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Flmr33630 - Manufacturer Name: TI(德州仪器) - Role: Regulator - Manufacturer Part Number: LMR33630ADDA - LCSC Part Number: C2866787 **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] ### U_5V — [AMS1117-5.0](https://www.flux.ai/vasy_skral/ams1117-50~zsf.md) - Role: Regulator - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810231832_Advanced-Monolithic-Systems-AMS1117-5-0_C6187.pdf - Part Type: Integrated Circuit - Role Details: 12V to 5V LDO; AMS1117 requires output capacitor and thermal dissipation check. - Symbol Style: parametric-v1 - Manufacturer Part Number: AMS1117-5.0 - Manufacturer Name: AMS **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] ### U_ACS — [20A Current Sensor](https://www.flux.ai/corynrobinson/20a-current-sensor~s0.md) - Manufacturer Name: Broadcom - Role: Current Sensing - Manufacturer Part Number: ACHS-7122-000E - Part Type: Sensor - Role Details: ACS712 20A current sensor output to STM32 ADC - Purchase Url: https://octopart.com/achs-7122-000e-broadcom-89945175 - Package or Case Code: 8-SO - Datasheet URL: https://octopart.com/datasheet/achs-7122-000e-broadcom-89945175 **Pins:** - FILTER - GND - IP- - IP- - IP+ - IP+ - VDD - VOUT ### U_LTE — [A7672SA LASE_](https://www.flux.ai/cherepanyadima/a7672sa-lase~7n.md) - Part Type: RF Transceiver - Manufacturer Name: SIMCom Wireless Solutions Limited - Role Details: A7672S LTE module powered by VCC_4V_LTE on VBAT pins 55/56/57. UART2, SIM1, STATUS, PWRKEY, RESET, and RF_ANT are wired. ERC power warnings on VDD_1V8, VDD_2V8, VBUS, and VBAT_ADC are accepted: these are module auxiliary/reference/optional pins not used as external board power inputs in this design. - Symbol Style: Parametric - Manufacturer Part Number: A7672S - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/7559/A7672SA.pdf - Role: Cellular Modem **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] ### U_MCU — [STM32F103C8T6](https://www.flux.ai/vasy_skral/stm32f103c8t6~isy.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: STMicroelectronics - Manufacturer Part Number: STM32F103C8T6 - Role Details: STM32F103C8T6 with SWD, UART2 LTE interface, sensors, relay control, OLED I2C. - Role: Microcontroller - Part Type: Microcontroller - Symbol Style: Parametric - Datasheet URL: https://www.st.com/resource/en/datasheet/stm32f103cb.pdf **Pins:** - BOOT0 [pin 44] - NRST [pin 7] - PA0 [pin 10] - PA1 [pin 11] - PA10 [pin 31] - PA11 [pin 32] - PA12 [pin 33] - PA13 [pin 34] - PA14 [pin 37] - PA15 [pin 38] - PA2 [pin 12] - PA3 [pin 13] - PA4 [pin 14] - PA5 [pin 15] - PA6 [pin 16] - PA7 [pin 17] - PA8 [pin 29] - PA9 [pin 30] - PB0 [pin 18] - PB1 [pin 19] - PB10 [pin 21] - PB11 [pin 22] - PB12 [pin 25] - PB13 [pin 26] - PB14 [pin 27] - PB15 [pin 28] - PB2 [pin 20] - PB3 [pin 39] - PB4 [pin 40] - PB5 [pin 41] - PB6 [pin 42] - PB7 [pin 43] - PB8 [pin 45] - PB9 [pin 46] - PC13 [pin 2] - PC14 [pin 3] - PC15 [pin 4] - PD0 [pin 5] - PD1 [pin 6] - VBAT [pin 1] - VDD [pin 24] - VDD [pin 36] - VDD [pin 48] - VDDA [pin 9] - VSS [pin 35] - VSS [pin 47] - VSS [pin 23] - VSSA [pin 8] ### U_OPTO1 — [PC817](https://www.flux.ai/kicad-part-library/pc817~0c.md) - Datasheet URL: http://www.soselectronic.cz/a_info/resource/d/pc817.pdf - Role: Isolation - Package or Case Code: DIP-4_W7.62mm - Role Details: PC817 optocoupler; RELAY_CTRL LED input from MCU side, phototransistor in GND_RELAY domain. - Manufacturer Part Number: PC817 **Pins:** - ~ [pin 1] - ~ [pin 3] - ~ [pin 2] - ~ [pin 4] ### U_OPTO2 — [PC817](https://www.flux.ai/kicad-part-library/pc817~0c.md) - Manufacturer Part Number: PC817 - Role Details: PC817 optocoupler for isolated S2/J_S2 input; LED/input side in GND_RELAY field domain, transistor/output side in STM32 GND_STAR logic domain using PB8/DS18B20_DATA. - Datasheet URL: http://www.soselectronic.cz/a_info/resource/d/pc817.pdf - Package or Case Code: DIP-4_W7.62mm - Role: Isolation **Pins:** - ~ [pin 1] - ~ [pin 3] - ~ [pin 2] - ~ [pin 4] ### Y1 — [8MHz Crystal Oscillator](https://www.flux.ai/corynrobinson/8mhz-crystal-oscillator~jt.md) - Datasheet URL: https://ecsxtal.com/store/pdf/ecx-32.pdf - Frequency: 8MHz - Role: Clock - Role Details: STM32 HSE clock source - Manufacturer Part Number: ECS-80-12-33-JGN-TR - Manufacturer Name: ECS - Part Type: Oscillator **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ayushqqq123/glecs-v4-logic-controller~nu](https://www.flux.ai/ayushqqq123/glecs-v4-logic-controller~nu).* --- *Generated from [https://www.flux.ai/ayushqqq123/glecs-v4-logic-controller~nu](https://www.flux.ai/ayushqqq123/glecs-v4-logic-controller~nu)*