Control board
About the Control board
Control board is an open source ESP32 PCB design by Freimor, published on GitHub. It is a 4-layer board measuring 90 × 110 mm, with 105 components from 57 distinct parts.
Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the ECMF02-2AMX6, PCA9555D, ADS1015IDGS, AMS1117-3.3 and LM339. By type, the board carries 31 resistors, 25 capacitors, 14 diodes, 10 ICs, 10 connectors and 5 LEDs.
Main components on the Control board
Control board bill of materials (BOM)
105 components, 57 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ECMF02-2AMX6 | ESD_ECMF02-2AMX6 | IC1 |
| 1 | ESP32-S3-WROOM-1 | ESP32-S3-WROOM-1 | U1 |
| 1 | PCA9555D | SSOP-24_5.3x8.2mm_P0.65mm | U2 |
| 1 | ADS1015IDGS | TSSOP-10_3x3mm_P0.5mm | U3 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U4 |
| 1 | LM339 | SOIC-14_3.9x8.7mm_P1.27mm | U5 |
| 1 | VL53L0CXV0DH1 | ToF_LaserRange_VL53L0X_NonStandartFootprint | U6 |
| 1 | PCA9685PW | TSSOP-28_4.4x9.7mm_P0.65mm | U7 |
| 1 | 74LVC1G80 | 74LVC1G80 | U8 |
| 1 | 74LVC2G17 | SOT-23-6_Handsoldering | U9 |
| 1 | AO3415 | SOT-23 | Q1 |
| 2 | SS8050 | SOT-23 | Q2, Q3 |
| 1 | USB_C_Receptacle_USB2.0 | RUICHI_TYPE-C-16PF-020 | J1 |
| 1 | BRUSH&STEPER_motors | PinHeader_2x08_P2.54mm_Vertical_SMD | J2 |
| 1 | POWER | PinHeader_2x03_P2.54mm_Vertical_SMD | J3 |
| 1 | BLDC_ENC_left | JST_PH_S3B-PH-SM4-TB_1x03-1MP_P2.00mm_Horizontal | J4 |
| 1 | I2C | JST_PH_S4B-PH-SM4-TB_1x04-1MP_P2.00mm_Horizontal | J5 |
| 1 | BLDC_ENC_right | JST_PH_S3B-PH-SM4-TB_1x03-1MP_P2.00mm_Horizontal | J6 |
| 1 | BRUSHLESS_motors | PinHeader_2x07_P2.54mm_Vertical_SMD | J7 |
| 1 | Sensors | PinHeader_2x05_P2.54mm_Vertical_SMD | J8 |
Show 37 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ArduCAM | JST_PH_S6B-PH-SM4-TB_1x06-1MP_P2.00mm_Horizontal | J9 |
| 1 | Conn_01x02_Pin | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | J10 |
| 1 | Buzzer | PASSIVE_SMD_MLT-8530 | BZ1 |
| 1 | PWRON | SW_SMD_KLS7-TS3401 | SW1 |
| 1 | START | SW_SMD_PAN_EVPAS | SW2 |
| 1 | FLASH | SW_SMD_KLS7-TS3401 | SW3 |
| 1 | EN | SW_SMD_KLS7-TS3401 | SW4 |
| 5 | SK6812_SIDE | ADR_LED_SK6812_SIDE | LED1, LED2, LED3, LED4, LED5 |
| 4 | D_Photo | R_LDR_5.1x4.3mm_P3.4mm_Vertical | D1, D2, D5, D6 |
| 1 | SS34 | D_SMA-SMB_Universal_Handsoldering | D3 |
| 1 | D_TVS | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | D4 |
| 1 | PWRON | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D7 |
| 1 | BZX585-B2V7 | D_SOD-523 | D8 |
| 4 | LED | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D9, D11, D12, D13 |
| 1 | 1N4007 | D_SOD-123 | D10 |
| 1 | 1N4007 | D_SOD-123F | D14 |
| 1 | CBM321609U301T | L_1206_3216Metric_Pad1.22x1.90mm_HandSolder | FB1 |
| 1 | MH2029-300Y | L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | FB2 |
| 6 | 10uF | C_0603_1608Metric | C1, C3, C9, C13, C14, C19 |
| 16 | 100n | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C2, C4, C5, C6, C8, C10, C11, C16 +8 |
| 2 | 1uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7, C15 |
| 1 | 4.7uF | C_0603_1608Metric | C12 |
| 2 | 4.7k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1, R2 |
| 10 | 10k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3, R4, R5, R8, R9, R10, R11, R19 +2 |
| 2 | 5.1k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R6, R7 |
| 1 | 10k (or DNP) | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R12 |
| 5 | 220 | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R13, R17, R21, R25, R27 |
| 1 | 2k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R14 |
| 1 | 1,1k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R15 |
| 1 | 14k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R16 |
| 1 | 140 | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R18 |
| 2 | 1k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R20, R31 |
| 1 | 20 | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R23 |
| 1 | 40 | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R26 |
| 1 | 30k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R28 |
| 1 | 7.2k | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R29 |
| 1 | 600 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R30 |
Control board design files
The KiCad project lives in the Freimor/HRDW-Microbot repository on GitHub; these links point at the commit this page was built from.
- LayoutKiCAD/control_board.kicad_pcb
- SchematicKiCAD/control_board.kicad_sch
Control board: common questions
What microcontroller does the Control board use?
The Control board is built around the ESP32-S3-WROOM-1, from the ESP32 family.
How big is the Control board?
The Control board measures 90 × 110 mm, has 4 copper layers and is 1.5 mm thick.
How many components are on the Control board?
105 components, from 57 distinct parts. The full bill of materials is listed on this page.
Where can I download the Control board design files?
From the Freimor/HRDW-Microbot repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Control board design in my own project?
The repository has no license, so all rights stay with Freimor. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Control board 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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