guyshka

ESP32 Climate Monitor Carrier

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guyshka

Simplify the design: do NOT design an onboard TP4056 circuit, boost converter, or surface-mount USB-C port. I already have all 4 complete breakout modules with standard 2.54 mm pin headers: the 30-pin ESP32, the 4-pin OLED, the 4-pin SHT40 module, and the blue TP4056 module. Only place through-hole header sockets/pads for these 4 modules and route the power and I2C connections between them. Make the PCB as small as possible

EasyGerber AI

A quick clarification before I continue:

A TP4056 module charges a single cell but does not boost its output to the 5 V needed at ESP32 VIN. With sockets for only these four modules, how should the ESP32 be powered? [1]
guyshka
EasyGerber AI
Proposed changes

Components added

2 components
  • J_TP2-pin 2.54mm female, TP4056 protected OUT+/OUT-
  • J_5V3-pin 2.54mm female, Pololu S13V20F5 VIN/GND/VOUT

Components removed

20 components
  • J_USBUSB-C 5V power input, side-entry
  • J_BAT2-pin JST-PH compatible protected 1S battery
  • U_CHGTP4056-42-ESOP8
  • U_BOOSTTPS61023 5.2V nominal boost
  • Q_LOADAO3401A load-sharing PMOS
  • D_USBSS24 USB-to-system Schottky
  • D_VINSS24 ESP32 VIN isolation Schottky
  • R_CC15.1k
  • R_CC25.1k
  • R_PROG12k, ~90mA charge setting
  • R_GATE100k
  • R_FB_TOP768k, 5.2V boost feedback upper
  • R_FB_BOT100k, boost feedback lower
  • L_BOOST1uH, 4.5A rated/5.3A saturation
  • C_CHG_IN10uF 16V
  • C_CHG_BAT10uF 16V
  • C_BOOST_IN22uF 16V
  • C_BOOST_OUT122uF 16V
  • C_BOOST_OUT222uF 16V
  • C_ESP_VIN10uF 16V

Nets added

2 nets
  • CHARGER_OUT_POS2 pins
    Connected pins
    J_5V.1, J_TP.1
    Class
    After: power
  • BOOST_5V2 pins
    Connected pins
    J_5V.3, J_ESP_L.1
    Class
    After: power

Nets removed

10 nets
  • USB_VBUS
  • USB_CC1
  • USB_CC2
  • BATT_POS
  • SYS_RAW
  • BOOST_SW
  • BOOST_5V2
  • BOOST_FB
  • ESP_VIN
  • CHG_PROG

Nets changed

2 nets
  • ESP_3V3Connections
    Connected pins
    J_SHT.2
    Disconnected pins
    J_SHT.1
  • GNDConnections
    Connected pins
    J_5V.2, J_TP.2
    Disconnected pins
    C_BOOST_IN.2, C_BOOST_OUT1.2, C_BOOST_OUT2.2, C_CHG_BAT.2, C_CHG_IN.2, C_ESP_VIN.2, J_BAT.2, J_USB.7, J_USB.A12, J_USB.B12, R_CC1.2, R_CC2.2, R_FB_BOT.2, R_GATE.2, R_PROG.2, U_BOOST.4, U_CHG.1, U_CHG.3, U_CHG.9

Component positions

9 changes
J_ESP_LMoved
Y
Before: 29.5 mmAfter: 25.5 mm
J_ESP_RMoved
Y
Before: 29.5 mmAfter: 25.5 mm
J_OLEDMoved
X
Before: 49 mmAfter: 48 mm
Y
Before: 60.5 mmAfter: 47 mm
J_SHTMoved
X
Before: 49 mmAfter: 48 mm
Y
Before: 43 mmAfter: 28 mm
J_TPPinned
X
After: 43 mm
Y
After: 8 mm
Rotation
After: 0°
Side
After: top
J_5VPinned
X
After: 54 mm
Y
After: 8 mm
Rotation
After: 0°
Side
After: bottom
J_USBUnpinned
X
Before: 50.16 mm
Y
Before: 4.751 mm
Rotation
Before: 0°
Side
Before: top
J_BATUnpinned
X
Before: 49 mm
Y
Before: 28 mm
Rotation
Before: 0°
Side
Before: top
U_CHGUnpinned
X
Before: 49 mm
Y
Before: 15 mm
Rotation
Before: 0°
Side
Before: top

Board settings

2 changes
Width
Before: 66 mmAfter: 63 mm
Height
Before: 64 mmAfter: 51 mm
Approved
EasyGerber AI

Simplified the carrier to through-hole sockets for the ESP32, OLED, five-pin SHT40, protected TP4056 output, and a Pololu S13V20F5 5 V regulator. Connect the battery to the TP4056 module itself; confirm your modules’ fit, ESP32 VIN-to-USB isolation, and charging-while-running safety before use.

Schematic updated: 6 parts, 6 nets in 185.02s
PCB layout completed in 0.13s
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