# Payground: OBDII to UART using STNXX chipset ## Description OBD2 to UART interface dev board. Alternative to deprecated ELM237 Chipset. Documentation: - Power tree: https://drive.google.com/file/d/1oG5_56AuaiLtG3buUaOyhg63TMySnYF3/view?usp=sharing ## Project Details - **Owner:** collinsemasi - **Created:** 4/8/2024 - **Last Updated:** 7/3/2024 - **Visibility:** Public - **Forks:** 1 ## Key Components ### — [M2 Mounting Hole](https://www.flux.ai/vasyl/m2-mounting-hole~st.md) **Pins:** - ~ ### — [M2 Mounting Hole](https://www.flux.ai/vasyl/m2-mounting-hole~st.md) **Pins:** - ~ ### — [M2 Mounting Hole](https://www.flux.ai/vasyl/m2-mounting-hole~st.md) **Pins:** - ~ ### D3 — [SK34A](https://www.flux.ai/adrian95/sk34a~xmp.md) - Manufacturer Name: Taiwan Semiconductor Corporation - Part Type: Diode - Manufacturer Part Number: SK34A - Datasheet URL: https://www.taiwansemi.com/assets/uploads/datasheet/SK32A%20SERIES_V2102.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### D8 — [BAS16TW-7](https://www.flux.ai/jecstronic/bas16tw-7~zo.md) - Datasheet URL: https://www.mouser.com/datasheet/2/115/ds30154-17457.pdf - Manufacturer Part Number: BAS16TW-7 - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Diodes Incorporated **Pins:** - A1 [pin 1] - A2 [pin 2] - A3 [pin 3] - K1 [pin 6] - K2 [pin 5] - K3 [pin 4] ### J1 — [DB9_Female_MountingHoles](https://www.flux.ai/adrian95/db9femalemountingholes~9m8.md) - Part Type: Connector **Pins:** - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - PAD ### J2 — [Pin Header 01x08 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x08-254mm-vertical~4nq.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] ### J3 — [Pin Header 01x08 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x08-254mm-vertical~4nq.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] ### J4 — [Pin Header 01x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x04-254mm-vertical~l97.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### LED1 — [Low Power Green LED](https://www.flux.ai/corynrobinson/low-power-green-led~0r.md) - Part Type: LED - Purchase Url: https://octopart.com/598-8070-107f-dialight-872854?r=sp - Package or Case Code: D_0603_1608Metric - Datasheet URL: https://octopart.com/datasheet/598-8070-107f-dialight-872854 - Manufacturer Name: Dialight - Manufacturer Part Number: 598-8070-107F - Forward Voltage: 2V - Current: 20mA **Pins:** - A - K ### LED2 — [Low Power Green LED](https://www.flux.ai/corynrobinson/low-power-green-led~0r.md) - Part Type: LED - Purchase Url: https://octopart.com/598-8070-107f-dialight-872854?r=sp - Package or Case Code: D_0603_1608Metric - Manufacturer Name: Dialight - Datasheet URL: https://octopart.com/datasheet/598-8070-107f-dialight-872854 - Forward Voltage: 2V - Current: 20mA - Manufacturer Part Number: 598-8070-107F **Pins:** - A - K ### LED3 — [Low Power Green LED](https://www.flux.ai/corynrobinson/low-power-green-led~0r.md) - Package or Case Code: D_0603_1608Metric - Datasheet URL: https://octopart.com/datasheet/598-8070-107f-dialight-872854 - Manufacturer Name: Dialight - Forward Voltage: 2V - Current: 20mA - Manufacturer Part Number: 598-8070-107F - Part Type: LED - Purchase Url: https://octopart.com/598-8070-107f-dialight-872854?r=sp **Pins:** - A - K ### Q1 — ZXMP6A13FTA - Datasheet URL: https://www.diodes.com/assets/Datasheets/ZXMP6A13F.pdf - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Diodes Incorporated - Manufacturer Part Number: ZXMP6A13FTA **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q2 — [BSS138DW-7-F](https://www.flux.ai/adrian95/bss138dw-7-f~c8.md) - Manufacturer Name: Diodes Incorporated - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds30203.pdf - Part Type: Transistor - Manufacturer Part Number: BSS138DW-7-F - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D1 [pin 3] - D2 [pin 6] - G1 [pin 5] - G2 [pin 2] - S1 [pin 4] - S2 [pin 1] ### Q3 — SSF2215 - Manufacturer Name: Good-Ark Semiconductor - Datasheet URL: https://goodarksemi.com/docs/datasheets/mosfets/SSF2215.pdf - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SSF2215 **Pins:** - D1 [pin 6] - D2 [pin 4] - G1 [pin 1] - G2 [pin 3] - S1 [pin 5] - S2 [pin 2] ### Q4 — SSF2215 - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SSF2215 - Manufacturer Name: Good-Ark Semiconductor - Datasheet URL: https://goodarksemi.com/docs/datasheets/mosfets/SSF2215.pdf **Pins:** - D1 [pin 6] - D2 [pin 4] - G1 [pin 1] - G2 [pin 3] - S1 [pin 5] - S2 [pin 2] ### Q5 — [MBT2222ADW1T1G](https://www.flux.ai/jecstronic/mbt2222adw1t1g~t86.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mbt2222adw1t1-d.pdf - Part Type: Transistor - Manufacturer Name: onsemi - Manufacturer Part Number: MBT2222ADW1T1G **Pins:** - B1 [pin 2] - B2 [pin 5] - C1 [pin 6] - C2 [pin 3] - E1 [pin 1] - E2 [pin 4] ### Q6 — [BSS138DW-7-F](https://www.flux.ai/adrian95/bss138dw-7-f~c8.md) - Manufacturer Part Number: BSS138DW-7-F - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds30203.pdf - Manufacturer Name: Diodes Incorporated **Pins:** - D1 [pin 3] - D2 [pin 6] - G1 [pin 5] - G2 [pin 2] - S1 [pin 4] - S2 [pin 1] ### Q7 — [MMBT3906-7-F](https://www.flux.ai/jecstronic/mmbt3906-7-f~d69.md) - Part Type: Transistor - Manufacturer Name: Diodes Incorporated - Manufacturer Part Number: MMBT3906-7-F - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Diodes%20PDFs/MMBT3906.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q8 — PMV100EPAR - Manufacturer Part Number: PMV100EPAR - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/PMV100EPA.pdf - Manufacturer Name: Nexperia USA Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Transistor **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### U1 — STN2120 - Datasheet URL: https://www.scantool.net/scantool/downloads/206/stn21xx_ds_c.pdf - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: OBD Solutions - Manufacturer Part Number: STN2120-I/ML **Pins:** - !ISO_K_TX/GP6 [pin 43] - !ISO_L_TX/GP7 [pin 44] - !ISO_RX/GP5 [pin 21] - !J1850_BUS+_VH¯/GP4 [pin 25] - !LED_HOST_ACT/GP24 [pin 13] - !LED_OBD_ACT/!RST_NVM/GP22 [pin 12] - !PWR_CTRL /GP19 [pin 32] - !RESET [pin 18] - !SLEEP/GP18 [pin 27] - ANALOG_IN [pin 19] - AVDD [pin 17] - AVSS [pin 16] - GP28 [pin 1] - GP29 [pin 2] - GP30 [pin 3] - GP31 [pin 15] - GP32 [pin 20] - GP33 [pin 26] - GP34 [pin 37] - GP35 [pin 38] - HS_CAN_RX/GP8 [pin 10] - HS_CAN_TX/GP9 [pin 8] - J1850_BUS-_TX/GP3 [pin 33] - J1850_BUS+_TX/GP2 [pin 24] - LED_STATUS/GP26 [pin 14] - MS_CAN_RX/GP10 [pin 11] - MS_CAN_TX/GP11 [pin 9] - OSC1 [pin 30] - OSC2 [pin 31] - PAD [pin 45] - PWM_RX/GP0 [pin 23] - SW_CAN_LOAD/GP16 [pin 34] - SW_CAN_MODE0/GP14 [pin 35] - SW_CAN_MODE1/GP15 [pin 36] - SW_CAN_RX/GP12 [pin 42] - SW_CAN_TX/GP13 [pin 41] - UART_RX [pin 5] - UART_TX [pin 4] - VCAP [pin 7] - VDD [pin 28] - VDD [pin 40] - VPW_RX/GP1 [pin 22] - VSS [pin 6] - VSS [pin 39] - VSS [pin 29] ### U10 — [MCP6L01T-E-OT](https://www.flux.ai/jecstronic/mcp6l01t-e-ot~cp2.md) - Manufacturer Part Number: MCP6L01T-E/OT - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/MCP6L01-1R-1U-2-4-1-MHz-85-uA-Op-Amps-DS20002140D.pdf - Manufacturer Name: Microchip Technology - Part Type: Operational Amplifier (OP-AMP) **Pins:** - - [pin 4] - + [pin 3] - OUTPUT [pin 1] - V- [pin 2] - V+ [pin 5] ### U2 — TPS56624x - Manufacturer Part Number: TPS566242 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/product/TPS562242 - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments **Pins:** - AGND [pin 4] - EN [pin 5] - FB [pin 6] - GND [pin 3] - SW [pin 2] - VIN [pin 1] ### U3 — LM317DCY - Part Type: Linear Voltage Regulator - Manufacturer Name: Texas Instruments Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/lit/ds/symlink/lm317.pdf?ts=1666119013015&ref_url=https%253A%252F%252Fwww.google.com%252F - Manufacturer Part Number: LM317DCY **Pins:** - ADJ [pin 1] - VIN [pin 3] - VOUT [pin 2] ### U4 — LM339LVRTER - Datasheet URL: https://www.ti.com/lit/ds/symlink/lm339lv.pdf - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments - Manufacturer Part Number: LM339LVRTER **Pins:** - GND [pin 12] - GND [pin 17] - IN1- [pin 2] - IN1+ [pin 4] - IN2- [pin 5] - IN2+ [pin 6] - IN3- [pin 7] - IN3+ [pin 8] - IN4- [pin 9] - IN4+ [pin 11] - NC [pin 10] - NC [pin 3] - OUT1 [pin 16] - OUT2 [pin 15] - OUT3 [pin 14] - OUT4 [pin 13] - V+ [pin 1] ### U5 — [MCP2551T-I/SN](https://www.flux.ai/adrian95/mcp2551t-isn~sl9.md) - Part Type: Integrated Circuit - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/20001667G.pdf - Manufacturer Name: Microchip Technology - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MCP2551T-I/SN **Pins:** - CANH [pin 7] - CANL [pin 6] - Rs [pin 8] - RXD [pin 4] - TXD [pin 1] - VDD [pin 3] - Vref [pin 5] - VSS [pin 2] ### U6 — [MCP2551T-I/SN](https://www.flux.ai/adrian95/mcp2551t-isn~sl9.md) - Part Type: Integrated Circuit - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/20001667G.pdf - Manufacturer Name: Microchip Technology - Manufacturer Part Number: MCP2551T-I/SN - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - CANH [pin 7] - CANL [pin 6] - Rs [pin 8] - RXD [pin 4] - TXD [pin 1] - VDD [pin 3] - Vref [pin 5] - VSS [pin 2] ### U7 — LM317DCY - Manufacturer Part Number: LM317DCY - Datasheet URL: https://www.ti.com/lit/ds/symlink/lm317.pdf?ts=1666119013015&ref_url=https%253A%252F%252Fwww.google.com%252F - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments Inc. - Part Type: Linear Voltage Regulator **Pins:** - ADJ [pin 1] - VIN [pin 3] - VOUT [pin 2] ### U8 — TH8056KDC-AAA-008 - Part Type: Integrated Circuit - Manufacturer Name: Melexis - Manufacturer Part Number: TH8056KDC-AAA-008-SP - Datasheet URL: https://www.mouser.com/ProductDetail/Melexis/TH8056KDC-AAA-008-SP?qs=KuGPmAKtFKUvyvboOF2ICQ%3D%3D **Pins:** - CANH [pin 7] - GND [pin 8] - LOAD [pin 6] - MODE0 [pin 2] - MODE1 [pin 3] - RXD [pin 4] - TXD [pin 1] - VBAT [pin 5] ### X2 — [ABM8AIG-16.000MHZ-12-2Z-T3](https://www.flux.ai/adrian95/abm8aig-16p000mhz-12-2z-t3~4j3.md) - Part Type: Oscillator - Datasheet URL: https://abracon.com/AIGcrystals/ABM8AIG.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Abracon LLC - Manufacturer Part Number: ABM8AIG-16.000MHZ-12-2Z-T3 **Pins:** - 1 [pin 1] - 3 [pin 3] - GND [pin 2] - GND [pin 4] ### Z1 — [BZX384-C27,115](https://www.flux.ai/adrian95/bzx384-c27c115~tum.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode - Manufacturer Name: NXP Semiconductors - Manufacturer Part Number: BZX384-C27,115 - Datasheet URL: https://rocelec.widen.net/view/pdf/bpaindpxed/PHGLS19461-1.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/collinsemasi/payground-obdii-to-uart-using-stnxx-chipset~oz](https://www.flux.ai/collinsemasi/payground-obdii-to-uart-using-stnxx-chipset~oz).* --- *Generated from [https://www.flux.ai/collinsemasi/payground-obdii-to-uart-using-stnxx-chipset~oz](https://www.flux.ai/collinsemasi/payground-obdii-to-uart-using-stnxx-chipset~oz)*