Project Spec Refinement

marauder3

marauder3

Review schematic and DRC issues, finalize the power budget, then optimize placement without routing.

flux

I’ll audit the schematic and current ERC/DRC findings, resolve issues that affect layout readiness, finalize the power budget in the project files, then optimize component placement while leaving every net unrouted.
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Power Budget

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Power Budget Scope and assumptions
Datasheet-grounded planning budget for the 3.3 V rail and 1S LiPo/USB sources. Battery capacity and OLED model are unspecified, so runtime is expressed parametrically and OLED current is an explicit allowance, not a claimed value. Values are estimates until verified on assembled hardware.
  • Battery usable range: 3.0–4.2 V, protected 1S LiPo; capacity Cbat mAh remains TBD.
  • 3.3 V rail: TPS63070 in power-save mode; 54 µA typical VIN quiescent current and 5 µA typical VOUT quiescent current from the datasheet test condition.
  • Conversion assumptions: 85% conservative at 3.0 V for peak sizing; 90% planning efficiency for moderate active loads. At sleep currents, efficiency is not used; quiescent and leakage currents are added directly.

flux

Blocked because no ACUs are currently available, so the schematic review, DRC remediation, finalized power budget, and placement optimization could not be executed. No schematic, PCB, routing, or project-file changes were made; routing remains untouched.
Resolve ACU limitation
Document power assumptions
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Block Diagram
Text
Remote USB-C daughterboard
  VBUS, GND, D-, D+, SHIELD
          |
          v
USB cable interface -> ESD + series options -> ESP32-S3 native USB
          |
          +-> protected/load-shared SYS input
LiPo JST-PH -> TP4056 (200 mA charger) -> AN1149-style load share -> SYS
                                                           |
                                                           v
                                      TPS63070 3.3 V buck-boost -> 3V3
                                                           |
                         +---------------------------------+------------------+
                         |                                 |                  |
                  ESP32-S3-WROOM-1                  CC1101 315 MHz      Remote I/O
                  EN/BOOT/service hdr              SPI + crystal       OLED I2C + controls
                         |                                 |
                         +---------------------- 50 ohm match/filter -> edge SMA
Functional Blocks and Sourcing Plan
  • Power input/load sharing/charger: from scratch; TP4056 200 mA and Microchip AN1149-style USB/battery power-path topology.
  • 3.3 V regulator: from scratch around TPS63070 or verified equivalent, using datasheet/EVM support values.
  • MCU: ESP32-S3-WROOM-1 PCB-antenna module with native USB, straps, ADC divider, and service header.
  • Sub-GHz radio: CC1101 315 MHz reference topology per TI Figure 10/Table 21 and SWRR046.
  • Remote interfaces: locking cable connectors for USB daughterboard, OLED, and controls.
  • Mechanical: 75.0 x 30.0 mm four-layer main PCB with four 2.2 mm mounting holes; enclosure photos are approximate evidence only.
Validated reference projects will be searched by block; if no clean importable module exists, real library parts and manufacturer reference circuits are used.

  • Functional Blocks and Sourcing Plan

Documents

Assets

Assets are files uploaded to this project which can be used in various ways.

315 MHz ESP32-S3 Wireless Node thumbnail
Four-layer ESP32-S3 and 315 MHz CC1101 LiPo wireless node with remote USB, OLED, and controls.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$6.11–$8.42

Digi-Key

$4.84

HQonline

$1.45–$1.57

LCSC

$8.23–$8.39

Mouser

$18.18–$18.22

TME

$5.03

Verical

$5.24–$17.50

Controls