SenseEHajo
About the SenseEHajo PCB
SenseEHajo is an open source ESP32 PCB design by ehajo, published on GitHub. It is a 2-layer board measuring 141 × 56.9 mm, with 97 components from 48 distinct parts.
Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the AP3012, MCP3221, 74LVC1G125, K814P and 74LVC1G10. By type, the board carries 36 resistors, 23 capacitors, 13 ICs, 6 diodes, 5 connectors and 3 switches.
From the project
Software for SenseHaJo Streamproject
Die Youtube-Livestream Playlist befindet sich hier: Playlist on Youtube
Livestreams immer hier auf Twitch: Link zu Twitch
Main components on the SenseEHajo
SenseEHajo bill of materials (BOM)
97 components, 48 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AP3012 | SOT-23-5_HandSoldering | IC1 |
| 1 | MCP3221 | SOT-23-5_HandSoldering | IC2 |
| 3 | 74LVC1G125 | SC-74A | IC3, IC5, IC6 |
| 1 | K814P | DIP-4_W7.62mm | IC4 |
| 1 | 74LVC1G10 | SOT-23-6_Handsoldering | IC7 |
| 1 | INA350ABS | SOT-23-8_Handsoldering | IC8 |
| 1 | ESP32-WROOM-32 | ESP32-WROOM-32_HandSolder | U1 |
| 1 | MCP6001-OT | SOT-23-5 | U2 |
| 2 | MOC3043M | DIP-6_W7.62mm | U3, U4 |
| 1 | LM1117-3.3 | SOT-223-3_TabPin2 | U6 |
| 1 | BSS138 | SOT-23 | Q1 |
| 1 | Conn_01x02_Male | PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | REED | PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | RTC ( DS3231) | PinHeader_1x05_P2.54mm_Vertical | J3 |
| 1 | Conn_01x05 | PinHeader_1x05_P2.54mm_Vertical | J6 |
| 1 | Prog | PinHeader_1x05_P2.54mm_Vertical | J9 |
| 1 | 0.5A / 230VAC | C_Rect_L7.0mm_W4.5mm_P5.00mm | F1 |
| 2 | Jumper_2_Open | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2 |
| 1 | HLK-PM01 | Converter_ACDC_HiLink_HLK-PMxx | PS1 |
| 1 | Varistor 10D561 | RV_Disc_D9mm_W5.2mm_P5mm | RV1 |
Show 28 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SW1 ( Boot ) | SW_PUSH_6mm | SW2 |
| 1 | MACHINE_SW2 | SW_PUSH_6mm | SW3 |
| 1 | MACHINE_SW3 | SW_PUSH_6mm | SW4 |
| 2 | QJ8025 | TO-263-3_TabPin2 | T1, T2 |
| 1 | D_Schottky | D_SOD-523 | D2 |
| 3 | WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D3, D6, D7 |
| 1 | 1N4006 | D_DO-201AD_P15.24mm_Horizontal | D4 |
| 1 | PMEG4010EGWX | D_SOD-123 | D5 |
| 2 | Ferrite_Bead | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | FB1, FB2 |
| 1 | 10uH | L_Wuerth_MAPI-3015 | L1 |
| 2 | 1uF / 10V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C3 |
| 15 | 100nF / 10V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C4, C5, C6, C7, C8, C14, C15 +7 |
| 1 | 10uF/10V | CP_Elec_4x4.5 | C9 |
| 2 | 1uF/25V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10, C12 |
| 1 | 47uF/10V | CP_Elec_5x5.3 | C11 |
| 1 | 10uF/25V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C13 |
| 1 | 10uF / 10V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C18 |
| 20 | 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R5, R8, R9, R12, R13, R14, R21 +12 |
| 1 | 2k2 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 1k8 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 10k (DNP) | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 2 | 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6, R7 |
| 2 | 150R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10, R11 |
| 2 | 360R | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R15, R17 |
| 2 | 330R | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R16, R18 |
| 3 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R20, R38, R39 |
| 1 | 43.2k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R23 |
| 1 | 100R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R29 |
SenseEHajo design files
The KiCad project lives in the ehajo/SenseHaJo repository on GitHub; these links point at the commit this page was built from.
SenseEHajo: common questions
What microcontroller does the SenseEHajo use?
The SenseEHajo is built around the ESP32-WROOM-32, from the ESP32 family.
How big is the SenseEHajo PCB?
The SenseEHajo measures 141 × 56.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the SenseEHajo?
97 components, from 48 distinct parts. The full bill of materials is listed on this page.
Where can I download the SenseEHajo design files?
From the ehajo/SenseHaJo repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the SenseEHajo design in my own project?
The repository has no license, so all rights stay with ehajo. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the SenseEHajo 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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