# Rising Brown Robot Maid ## Description 12 V to 3.3 V, 1 A Buck-Regulated Power Delivery Integration ## Project Details - **Owner:** zer044 - **Created:** 12/29/2025 - **Last Updated:** 12/29/2025 - **Visibility:** Public - **Current Rating:** 1A - **Max Input Voltage:** 12V - **Net Type:** Power - **Operating Voltage:** 3.3V - **Domain:** Consumer Electronics - **Role Details:** 12 V to 3.3 V, 1 A buck-regulated power delivery for ESP32-S3 and peripherals - **Role:** Power Conversion - **Power Requirements:** Mains - **System Architecture:** flowchart TD A["12V Input"] --> B["Buck Regulator"] B --> C["Inductor"] C --> D["3.3V Output"] A --> E["Input Capacitor"] E --> F["Ground"] D --> G["Output Capacitor"] G --> F B --> F ## Key Components ### U1 — [ESP32-S3-WROOM-1-N16R2](https://www.flux.ai/lcsc/esp32-s3-wroom-1-n16r2.md) - Package or Case Code: WIRELM-SMD_ESP32-S3-WROOM-1 - JLCPCB Part Class: Extended Part - Manufacturer Part Number: ESP32-S3-WROOM-1-N16R2 - Manufacturer Name: ESPRESSIF(乐鑫) - LCSC Part Number: C2913205 **Pins:** - 3V3 [pin 2] - EN [pin 3] - GND [pin 40] - GND [pin 41] - GND [pin 1] - 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 — [MAX3232IPWR](https://www.flux.ai/lcsc/max3232ipwr.md) - Operating Temperature: -40℃~+85℃ ℃ - LCSC Part Number: C113205 - Manufacturer Name: TI(德州仪器) - IC Type: Transceiver - Supply Voltage: 3~5.5V - Manufacturer Part Number: MAX3232IPWR - Part Type: RS232 ICs - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010301_Texas-Instruments-MAX3232IPWR_C113205.pdf - JLCPCB Part Class: Extended Part - Package or Case Code: TSSOP-16_L5.0-W4.4-P0.65-LS6.4-BL - Product Info Url: https://lcsc.com/product-detail/RS232_TI_MAX3232IPWR_MAX3232IPWR_C113205.html **Pins:** - C1- [pin 3] - C1+ [pin 1] - C2- [pin 5] - C2+ [pin 4] - DIN1 [pin 11] - DIN2 [pin 10] - DOUT1 [pin 14] - DOUT2 [pin 7] - GND [pin 15] - RIN1 [pin 13] - RIN2 [pin 8] - ROUT1 [pin 12] - ROUT2 [pin 9] - V- [pin 6] - V+ [pin 2] - VCC [pin 16] ### U3 — [LM2596SX-3.3/NOPB](https://www.flux.ai/adrian95/lm2596sx-3p3nopb.md) - Manufacturer Part Number: LM2596SX-3.3/NOPB - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - Role Details: Buck regulator IC converting 12 V to 3.3 V at up to 1 A - Package: TO-263-6 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=http%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Flm2596 - Role: Power Conversion **Pins:** - FB [pin 4] - GND [pin 6] - GND [pin 3] - ON/OFF [pin 5] - OUT [pin 2] - VIN [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/zer044/rising-brown-robot-maid](https://www.flux.ai/zer044/rising-brown-robot-maid).* --- *Generated from [https://www.flux.ai/zer044/rising-brown-robot-maid](https://www.flux.ai/zer044/rising-brown-robot-maid)*