/ESPesh

One inch ESP32 PCB designed for low power IoT applications.

Primary LanguageOpenSCADOtherNOASSERTION

ESPesh

CC license Maintenance PRs Welcome GitHub release GitHub contributors

ESPesh

ESPesh is a super tiny board designed for IoT applications. My plan is to use it as a BLE Mesh for IoT sensors and switches, because with BLE the power consumption is less than 1mA.

Features

  • ESP32-PICO-D4
  • Low power design (LDO, removed unnecessary components)
  • Only one inch PCB
  • USB C (only for power, not programming)
  • LiPO battery (with charger and voltage protections)
  • Some GPIOs exposed (I2C included)

BOM

I mainly use JLCPCB and LCSC for PCB and components.

Component Quantity Link Price
ESP32-PICO-D4 1 https://lcsc.com/product-detail/Others_Espressif-Systems-ESP32-PICO-D4_C193707.html $4.34
PRO-OB-440 1 https://www.digikey.es/product-detail/es/proant-ab/PRO-OB-440/1532-1001-1-ND/4895684 $0.95
LIR2450 1 https://es.aliexpress.com/item/32853897751.html $2.76
0.1uF 3 https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_SAMSUNG_CL10B104KA8NNNC_100nF-104-10-25V_C1590.html $0.29
2.7pF 1 https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_SAMSUNG_CL10C2R7CB8NNNC_2-7pF-2R7-0-25pF-50V_C16149.html $0.61
4.7pF 1 https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_SAMSUNG_CL10C4R7CB8NNNC_4-7pF-4R7-0-25pF-50V_C57140.html $0.405
10uF Tantalum 2 https://lcsc.com/product-detail/Tantalum-Capacitors_AVX_TAJA106K010RNJ_10uF-106-10-10V_C7177.html $0.2386
10uF 1 https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_SAMSUNG_CL10A106KP8NNNC_10uF-106-10-10V_C19702.html $0.52
LED 0603 1 https://lcsc.com/product-detail/Light-Emitting-Diodes-LED_Red-LED-SMDLED-80-100mcd_C84263.html $0.64
SK6805 1 https://es.aliexpress.com/item/32903030496.html $3.23
MBR0520 1 https://lcsc.com/product-detail/Schottky-Barrier-Diodes-SBD_Changjiang-Electronics-Tech-CJ-MBR0520_C77335.html $0.56
FDN340P 1 https://lcsc.com/product-detail/MOSFET_ON-Semicon_FDN340P_ON-Semicon-ON-FDN340P_C75469.html $0.1241
1.6nH 1 https://lcsc.com/product-detail/Others_GOOGLL-GGW0603UC1N6KGT_C343064.html $0.0310
10K 2 https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_Uniroyal-Elec-0603WAF1002T5E_C25804.html $0.1
6.8K 2 https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_Uniroyal-Elec-0603WAF6801T5E_C23212.html $0.1
2K 1 https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_Uniroyal-Elec-0603WAF2001T5E_C22975.html $0.1
5K1 2 https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_Uniroyal-Elec-0603WAF5101T5E_C23186.html $0.1
43K 1 https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_Uniroyal-Elec-0603WAF4302T5E_C23172.html $0.11
100R 1 https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_Uniroyal-Elec-0603WAF1000T5E_C22775.html $0.11
100K 1 https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_Uniroyal-Elec-0603WAF1003T5E_C25803.html $0.1
SPX3819M5-L-3-3 1 https://lcsc.com/product-detail/Low-Dropout-Regulators-LDO_EXAR_SPX3819M5-L-3-3-TR_SPX3819M5-L-3-3-TR_C9055.html $0.1225
SL4054ST25P 1 https://lcsc.com/product-detail/Others_TECHFUSE-SL4054ST25P_C258510.html $0.509
XB6566H0 1 https://lcsc.com/product-detail/Others_XB6566H0_C190847.html $0.1734
HDC1080 1 https://lcsc.com/product-detail/Humidity-Moisture-Sensors_TI_HDC1080DMBR_HDC1080DMBR_C82227.html $1.1216
HRO-TYPE-C-31-M-12 1 https://lcsc.com/product-detail/USB-Type-C_Korean-Hroparts-Elec-TYPE-C-31-M-12_C165948.html $0.3882
TOTAL $17.7334

Take in account that some components must be ordered in larger batches that the quantity needed (for example: SK6805: we need only one, but min order is 10).

Todos

  • Wiki
  • Test the board
  • Sell it on Tindie so I can keep developing such tiny boards

License

Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Public License

Open Source, Hell Yeah!