Esc-1s frame
kokjo·esc-1s-frame
About the Esc-1s frame PCB
Esc-1s frame is an open source Silicon Labs PCB design by kokjo, published on GitHub. It is a 4-layer board measuring 99.6 × 99.6 mm, with 95 components from 16 distinct parts.
Its main chip is the EFM8BB51F2G-A-QFN20, from the Silicon Labs family. Other key parts include the XR30G30D and SPX3819M5-L-3-3. By type, the board carries 49 resistors, 23 capacitors, 17 ICs and 6 connectors.
From the project
FPV Drone ESC, With PCB as FRAME ================================

Main components on the Esc-1s frame
Esc-1s frame bill of materials (BOM)
95 components, 16 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | EFM8BB51F2G-A-QFN20 | SiliconLabs_QFN-20-1EP_3x3mm_P0.5mm_EP1.8x1.8mm | U1, U9, U13, U17 |
| 12 | XR30G30D | DFN-8-1EP_3x3mm_P0.65mm_EP1.55x2.4mm | U2, U3, U4, U5, U7, U8, U10, U11 +4 |
| 1 | SPX3819M5-L-3-3 | SOT-23-5 | U6 |
| 1 | Bat | PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | Ctrl | JST_SH_SM08B-SRSS-TB_1x08-1MP_P1.00mm_Horizontal | J2 |
| 1 | M4 | Molex_PicoBlade_53048-0310_1x03_P1.25mm_Horizontal | J3 |
| 1 | M1 | Molex_PicoBlade_53048-0310_1x03_P1.25mm_Horizontal | J4 |
| 1 | M2 | Molex_PicoBlade_53048-0310_1x03_P1.25mm_Horizontal | J5 |
| 1 | M3 | Molex_PicoBlade_53048-0310_1x03_P1.25mm_Horizontal | J6 |
| 5 | 100nF | C_0402_1005Metric | C1, C8, C13, C18, C23 |
| 4 | 1uF | C_0402_1005Metric | C2, C12, C17, C22 |
| 14 | 10uF | C_0805_2012Metric | C3, C4, C5, C6, C7, C9, C10, C11 +6 |
| 1 | 1m | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 12 | 100k | R_0402_1005Metric | R2, R6, R10, R14, R18, R22, R26, R30 +4 |
| 12 | 10k | R_0402_1005Metric | R3, R9, R13, R17, R21, R25, R29, R33 +4 |
| 24 | 33R | R_0402_1005Metric | R4, R5, R7, R8, R11, R12, R15, R16 +16 |
Esc-1s frame design files
The KiCad project lives in the kokjo/esc-1s-frame repository on GitHub; these links point at the commit this page was built from.
- Layoutesc-1s-frame.kicad_pcb
- Schematicesc-1s-frame.kicad_sch
Esc-1s frame: common questions
What microcontroller does the Esc-1s frame use?
The Esc-1s frame is built around the EFM8BB51F2G-A-QFN20, from the Silicon Labs family.
How big is the Esc-1s frame PCB?
The Esc-1s frame measures 99.6 × 99.6 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Esc-1s frame?
95 components, from 16 distinct parts. The full bill of materials is listed on this page.
Where can I download the Esc-1s frame design files?
From the kokjo/esc-1s-frame repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Esc-1s frame design in my own project?
The repository has no license, so all rights stay with kokjo. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Esc-1s frame without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Silicon Labs firmware against it before you order a PCB.
Similar boards
Silicon Labs
Tomu hardware
im-tomu
13 × 9.4 mm11 parts2LCC-BY-SA-4.0365Silicon Labs
One key
ahtn
14.5 × 14.5 mm10 parts2LNo license96Silicon Labs
2key
ahtn
36.5 × 17.5 mm7 parts2LNo license96Silicon Labs
Ble soil moisture sensor
Miceuz
170 × 18 mm33 parts2LApache-2.033Silicon Labs
Ble soil moisture sensor pannel
Miceuz
170 × 36 mm29 parts2LApache-2.033Silicon Labs
Ym2413 dev
andete
115 × 45 mm146 parts2LNo license25