DropGen
About the DropGen PCB
DropGen is an open source ESP32 PCB design by Katiekuehr, published on GitHub. It is a 2-layer board measuring 92.5 × 62.5 mm, with 20 components from 18 distinct parts.
Its main chip is the SEEED XIAO ESP32S3, from the ESP32 family. Other key parts include the TMC2209_SILENTSTEPSTICK, L293D and TPS5430DDAR. By type, the board carries 5 connectors, 5 capacitors, 4 ICs, 3 resistors, 2 diodes and 1 inductor.
Main components on the DropGen
DropGen bill of materials (BOM)
20 components, 18 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SEEED XIAO ESP32S3 | ESP32S3 | U1 |
| 1 | TMC2209_SILENTSTEPSTICK | MC2209 numbers | U2 |
| 1 | L293D | L293D | U3 |
| 1 | TPS5430DDAR | TI_SO-PowerPAD-8_ThermalVias | U4 |
| 1 | JST_3_PIN JST_3_pin | 3_pin_jst | J1 |
| 1 | JST_4_PIN JST_4_pin | 4_pin_jst | J2 |
| 1 | C194407 Barrel_Jack_Switch | BarrelJack_GCT_DCJ200-10-A_Horizontal | J3 |
| 1 | C784935 Camera Terminal Block | terminal_block | J4 |
| 1 | C784935 Piezo | terminal_block | J5 |
| 1 | B340A_C3018525 | D_SMC | D1 |
| 1 | LED | LED_0603_1608Metric | D2 |
| 1 | 22UH 22uH | L_Vishay_IHLP-4040 | L1 |
| 1 | 100UF 100uF | C_Elec_6.3x7.7 | C1 |
| 1 | 220UF 220uF | CP_EIA-6032-15_Kemet-U | C2 |
| 1 | 10NF 10nF | C_0805_2012Metric | C3 |
| 2 | 4.7UF 4.7uF | C_1210_3225Metric | C4, C5 |
| 1 | C106225 10KΩ T | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1 |
| 2 | 3.24kΩ | R_0603_1608Metric | R2, R3 |
DropGen design files
The KiCad project lives in the Katiekuehr/Droplet_PCB repository on GitHub; these links point at the commit this page was built from.
DropGen: common questions
What microcontroller does the DropGen use?
The DropGen is built around the SEEED XIAO ESP32S3, from the ESP32 family.
How big is the DropGen PCB?
The DropGen measures 92.5 × 62.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the DropGen?
20 components, from 18 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 DropGen design files?
From the Katiekuehr/Droplet_PCB 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 DropGen design in my own project?
The repository has no license, so all rights stay with Katiekuehr. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the DropGen 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.
More boards in Droplet_PCB
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