# WT32-ETH01 Carrier Socket ## Description WT32-ETH01 carrier refactored for a single 2x10 WT32 header, 12V input terminal, 6-pin Wiegand terminal, and a 12V-to-5V buck stage with level-shifted D0/D1 plus transistor-driven LED and BUZZER outputs, prepared for a simple 2-layer layout. ## Project Details - **Owner:** matteogrolla - **Created:** 3/31/2026 - **Last Updated:** 4/1/2026 - **Visibility:** Public - **System Architecture:** ```mermaid flowchart TD PWR["12V Input Terminal"] --> REG["12V to 3.3V Regulator"] REG --> MOD["WT32-ETH01 Module Header"] REG --> LVL["D0 D1 Level Shifter 5V to 3.3V"] WIEG["Wiegand 4 Pin Terminal"] --> LVL LVL --> MOD MOD --> DRV["LED and Buzzer NPN Drivers"] DRV --> WIEG ``` ## Key Components ### D1 — [1N5822RLG](https://www.flux.ai/lcsc/1n5822rlg~v8yy.md) - LCSC Part Number: C232464 - Part Type: Schottky Barrier Diodes (SBD) - Diode Type: Schottky - Manufacturer Part Number: 1N5822RLG - Package: DO-201AD - Product Info Url: https://lcsc.com/product-detail/Others_ON-Semicon_1N5822RLG_ON-Semicon-ON-1N5822RLG_C232464.html - Manufacturer Name: onsemi(安森美) - Role Details: Schottky catch diode for LM2576 switching node to ground return - Role: Freewheel Diode - JLCPCB Part Class: Extended Part - Voltage Rating: 40V - Current Rating: 3A - Package or Case Code: DO-201AD_BD5.3-L8.4-P12.50-D1.4-RD - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010333_onsemi-1N5822RLG_C232464.pdf **Pins:** - A [pin 2] - C [pin 1] ### IC1 — [LM2576-5.0WT](https://www.flux.ai/jecstronic/lm2576-5p0wt~lvs.md) - Datasheet URL: http://ww1.microchip.com/downloads/en/DeviceDoc/lm2576.pdf - Role Details: LM2576-5.0WT 12V to 5V non-synchronous buck regulator for hand-soldered 2-layer prototype - Role: Regulation - Manufacturer Name: Microchip Technology Inc. - Package: TO-220-5 - Part Type: Integrated Circuit - Manufacturer Part Number: LM2576-5.0WT - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~ON~/OFF [pin 5] - FEEDBACK [pin 4] - GROUND [pin 3] - OUTPUT [pin 2] - VIN [pin 1] ### J1 — [282837-2](https://www.flux.ai/vasy_skral/282837-2~69k.md) - Role Details: 2-position 12V input terminal with 12V and GND - Voltage: 12V - Part Type: Connector - Connector Positions: 2 - Role: Power Input - Package: Terminal Block - Connector Type: Terminal Block - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=282837&DocType=Customer+Drawing&DocLang=English - Manufacturer Part Number: 282837-2 - Manufacturer Name: TE Connectivity AMP Connectors **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [691137710006](https://www.flux.ai/adrian95/691137710006~j0n.md) - Role Details: 6-position Wiegand terminal with 12V, GND, D0, D1, LED and BUZZER - Voltage: 300V - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710006.pdf - Package: Terminal Block - Connector Pitch: 5mm - Connector Positions: 6 - Part Type: Connector - Connector Rows: 1 - Role: Field Interface - Manufacturer Name: Würth Elektronik - Operating Temperature: -30°C ~ 120°C - Pin Description: pin3 = D1 - Current: 16A - Manufacturer Part Number: 691137710006 - Pin Description: pin 3 = D1, pin4 = D0 - License: https://creativecommons.org/licenses/by/4.0/ - Package or Case Code: //www.snapeda.com/parts/691137710006/W%25C3%25BCrth+Elektronik+Midcom/view-part/?ref=eda **Pins:** - ~ [pin 5] - ~ [pin 2] - ~ [pin 3] - ~ [pin 6] - ~ [pin 1] - ~ [pin 4] ### J3 — [Pin Socket 01x13 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-01x13-254mm-vertical~kgz.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_10 [pin 10] - Pin_11 [pin 11] - Pin_12 [pin 12] - Pin_13 [pin 13] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### J4 — [Pin Socket 01x13 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-01x13-254mm-vertical~kgz.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_10 [pin 10] - Pin_11 [pin 11] - Pin_12 [pin 12] - Pin_13 [pin 13] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### Q1 — [MMBT2222ALT3G](https://www.flux.ai/adrian95/mmbt2222alt3g~vum.md) - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mmbt2222lt1-d.pdf - Part Type: Transistor - Manufacturer Part Number: MMBT2222ALT3G - Package: SOT-23-3 - Role Details: NPN low-side driver for Wiegand LED control line - Role: Switch Driver - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: onsemi **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q2 — [MMBT2222ALT3G](https://www.flux.ai/adrian95/mmbt2222alt3g~vum.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: Switch Driver - Manufacturer Name: onsemi - Package: SOT-23-3 - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mmbt2222lt1-d.pdf - Part Type: Transistor - Manufacturer Part Number: MMBT2222ALT3G - Role Details: NPN low-side driver for Wiegand BUZZER control line **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q3 — [BSS138](https://www.flux.ai/vasy_skral/bss138~3ld.md) - Manufacturer Name: onsemi - Part Type: Transistor - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf - Role: Level Translation - Manufacturer Part Number: BSS138 - Package: SOT-23-3 - Role Details: BSS138 discrete level shifter for Wiegand D0/D1, hand-solderable SOT-23 **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q4 — [BSS138](https://www.flux.ai/vasy_skral/bss138~3ld.md) - Package: SOT-23-3 - Manufacturer Part Number: BSS138 - Role: Level Translation - Role Details: BSS138 discrete level shifter for Wiegand D0/D1, hand-solderable SOT-23 - Manufacturer Name: onsemi - Part Type: Transistor - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/matteogrolla/wt32-eth01-carrier-socket~2x](https://www.flux.ai/matteogrolla/wt32-eth01-carrier-socket~2x).* --- *Generated from [https://www.flux.ai/matteogrolla/wt32-eth01-carrier-socket~2x](https://www.flux.ai/matteogrolla/wt32-eth01-carrier-socket~2x)*