Sonpakharu
About the Sonpakharu PCB
Sonpakharu is an open source ESP32 PCB design by bkrajendra, published on GitHub. It is a 2-layer board measuring 49 × 71 mm, with 47 components from 28 distinct parts.
Its main chip is the C3013945, from the ESP32 family. Other key parts include the C424093, C37663, C29613, C2682616 and C19738. By type, the board carries 16 resistors, 12 capacitors, 6 ICs, 6 diodes, 3 transistors and 1 battery holder.
It belongs with the iot & wireless designs in this gallery.
From the project
Wireless Data Aggregation System using the ESP-32 S3
Main components on the Sonpakharu
Sonpakharu bill of materials (BOM)
47 components, 28 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C3013945 ESP32-S3-WROOM-1U-N4 | ESP32S3WROOM1UN4 | IC1 |
| 1 | C424093 MCP73831-2-OT | SOT-23-5 | U1 |
| 1 | C37663 DS3231M | SOIC-16W_7.5x10.3mm_P1.27mm | U2 |
| 1 | C29613 MIC5219-3.3YM5 | SOT-23-5 | U3 |
| 1 | C2682616 MAX17048G_T10 | SON50P200X200X80-9N | U4 |
| 1 | C19738 MAX485E | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | C96616 PMV32UP | SOT-23 | Q1 |
| 2 | C57668 BC847 | SOT-23 | Q2, Q3 |
| 1 | Battery_Cell | BatteryHolder_Keystone_3002_1x2032 | BT1 |
| 1 | Boot | TACTILE SWITCH 3X4X2MM SMD | Boot1 |
| 1 | C17513 1k | R_0805_2012Metric | RPOG1 |
| 1 | Reset | TACTILE SWITCH 3X4X2MM SMD | Reset1 |
| 5 | C116159 MBR0540 | D_SOD-123 | D1, D3, D4, D5, D6 |
| 1 | C779453 Charging | LED_1206_3216Metric | D2 |
| 1 | C5137578 1uF | C_0805_2012Metric | C1 |
| 4 | C363560 1uF | C_0805_2012Metric | C2, C10, C11, C12 |
| 1 | C1743 470pf | C_0805_2012Metric | C3 |
| 2 | C15850 10uf | C_0805_2012Metric | C4, C5 |
| 1 | C49678 0.1uf | C_0805_2012Metric | C6 |
| 1 | C117025 2.2uf | CP_EIA-2012-12_Kemet-R_Pad1.30x1.05mm_HandSolder | C7 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | C5137578 10uF | C_0805_2012Metric | C8, C9 |
| 1 | C149504 100K | R_0805_2012Metric | R1 |
| 1 | C17477 0 | R_0805_2012Metric | R2 |
| 9 | C17414 10k | R_0805_2012Metric | R3, R5, R6, R7, R8, R11, R12, R13 +1 |
| 1 | C27834 5.1K | R_0805_2012Metric | R4 |
| 1 | C17614 3k9 | R_0805_2012Metric | R9 |
| 1 | C17415 10E | R_0805_2012Metric | R10 |
| 2 | C4328 20K | R_0805_2012Metric | R15, R16 |
Sonpakharu design files
The KiCad project lives in the bkrajendra/sonpakharu repository on GitHub; these links point at the commit this page was built from.
Sonpakharu: common questions
What microcontroller does the Sonpakharu use?
The Sonpakharu is built around the C3013945, from the ESP32 family.
How big is the Sonpakharu PCB?
The Sonpakharu measures 49 × 71 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Sonpakharu?
47 components, from 28 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Sonpakharu design files?
From the bkrajendra/sonpakharu repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Sonpakharu design in my own project?
The repository has no license, so all rights stay with bkrajendra. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Sonpakharu without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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