Ricardo-Hermes
About the Ricardo-Hermes PCB
Ricardo-Hermes is an open source ESP32 PCB design by icl-rocketry, published on GitHub. It is a 4-layer board measuring 43 × 65 mm, with 114 components from 62 distinct parts.
Its main chip is the ESP32-S3, from the ESP32 family. Other key parts include the SX1280IMLTRT, SN65HVD230, LM66200DRLR, MAX77827AEFD+T and SC4215ASTRT. By type, the board carries 43 capacitors, 31 resistors, 7 ICs, 5 inductors, 2 crystals and 2 connectors.
It belongs with the rf & radio designs in this gallery.
From the project
Radio gateway
ESP32c3 + SX1280 + SKY66112-11 Half-Duplex Lora radio gateway board.
Main components on the Ricardo-Hermes
Ricardo-Hermes bill of materials (BOM)
114 components, 62 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SX1280IMLTRT SX1280 | QFN50P400X400X95-24N | IC2 |
| 1 | ESP32-S3 | QFN40P700X700X90-57N | U1 |
| 1 | SN65HVD230 | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | LM66200DRLR | SOTFL50P160X60-8N | U3 |
| 1 | MAX77827AEFD+T | CONV_MAX77827AEFD+T | U4 |
| 1 | SC4215ASTRT | SOIC127P599X175-9N | U5 |
| 1 | SKY66112-11 | SKY66112-11_SKY | U12 |
| 1 | R940000171 | Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | C3034316 | Crystal_SMD_2016-4Pin_2.0x1.6mm | Y3 |
| 1 | RBUS | Molex_Mini-Fit_Jr_5566-06A_2x03_P4.20mm_Vertical | J1 |
| 1 | USB_C_RECEPTACLE_USB2.0 USB_C_Receptacle_USB2.0 | USB_C_Receptacle_Palconn_UTC16-G | J2 |
| 2 | BLUE_LED | D_0402_1005Metric | 3V3LED1, DIO3_D1 |
| 1 | Conn_01x02_Male | PinHeader_1x01_P2.54mm_Vertical | 3v3 |
| 1 | SMA | SMA_Molex_73251-1153_EdgeMount_Horizontal | ANT_SMA1 |
| 1 | u.FL | U.FL_Hirose_U.FL-R-SMT-1_Vertical | ANT_UFL1 |
| 2 | CONN_01X02_MALE Conn_01x02_Male | PinHeader_1x02_P2.54mm_Vertical | BOOTJUMPER1, ENJUMPER1 |
| 2 | C130720 ORANGE_LED | D_0402_1005Metric | CRXLED1, RXLED2 |
| 2 | C130722 GREEN_LED | D_0402_1005Metric | CTXLED1, TXLED1 |
| 2 | GREEN_LED | D_0402_1005Metric | ESP_TX_LED1, TXD_1_R1 |
| 1 | C135323 Fuse | Fuse_0603_1608Metric | F1 |
Show 42 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | FerriteBead_Small | L_0603_1608Metric | FB_P1 |
| 2 | C3011209 | L_0603_1608Metric | FB_R2, FB_R3 |
| 1 | TermJP | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | ORANGE_LED | D_0402_1005Metric | RXD_1_R1 |
| 1 | UART | Molex_Nano-Fit_105313-xx03_1x03_P2.50mm_Horizontal | UART1 |
| 1 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | UART_ESP1 |
| 1 | C130725 WHITE_LED | D_0402_1005Metric | USBLED1 |
| 1 | SM712_SOT23 | SOT-23 | D1 |
| 1 | SP0503BAHT | SOT-143 | D2 |
| 1 | 2.0NH 2.0nH | L_0402_1005Metric | L1 |
| 1 | 20NH 20nH | L_0402_1005Metric | L2 |
| 1 | 1UH 1uH | L_0805_2012Metric | L3 |
| 1 | 3.0 nH | L_0402_1005Metric | L7 |
| 1 | 2.5NH 2.5nH | L_0402_1005Metric | L8 |
| 5 | 10UF 10uF | C_0402_1005Metric | C1, C16, C20, C24, C26 |
| 4 | 1UF 1uF | C_0402_1005Metric | C2, C4, C7, C22 |
| 9 | 0.1UF 0.1uF | C_0402_1005Metric | C3, C5, C6, C8, C10, C11, C27, C54 +1 |
| 3 | 10NF 10nF | C_0402_1005Metric | C9, C52, C53 |
| 2 | 11PF 11pF | C_0402_1005Metric | C13, C14 |
| 4 | 0.1UF 100nF | C_0402_1005Metric | C15, C61, C68, C73 |
| 1 | 47NF 47nF | C_0402_1005Metric | C17 |
| 1 | 10UF 10uF | C_0603_1608Metric | C21 |
| 1 | 22UF 22uF | C_0603_1608Metric | C23 |
| 1 | 4.7UF 4.7uF | C_0402_1005Metric | C25 |
| 2 | 15PF 15pF | C_0402_1005Metric | C50, C51 |
| 1 | 470NF 470nF | C_0402_1005Metric | C57 |
| 3 | 1NF 1nF | C_0402_1005Metric | C65, C66, C70 |
| 2 | 4.7UF 4.7uF | C_0603_1608Metric | C71, C74 |
| 1 | 0.4 pF | C_0402_1005Metric | C77 |
| 2 | 1.2 pF | C_0402_1005Metric | C78, C80 |
| 1 | 0.5 pF | C_0402_1005Metric | C79 |
| 4 | 10K 10k | R_0402_1005Metric | R1, R3, R14, R17 |
| 6 | 470 | R_0402_1005Metric | R2, R4, R19, R36, R37, R38 |
| 3 | 1k | R_0402_1005Metric | R5, R18, R20 |
| 2 | 499R | R_0402_1005Metric | R6, R7 |
| 1 | 0 | R_0603_1608Metric | R8 |
| 2 | 60 | R_0603_1608Metric | R9, R10 |
| 3 | 5.1K 5.1k | R_0402_1005Metric | R11, R12, R13 |
| 1 | 14K 14k | R_0402_1005Metric | R15 |
| 1 | 56K 56k | R_0402_1005Metric | R16 |
| 4 | 20-100 | R_0402_1005Metric | R25, R26, R29, R30 |
| 4 | 20-100 50 | R_0402_1005Metric | R31, R32, R33, R34 |
Ricardo-Hermes design files
The KiCad project lives in the icl-rocketry/Ricardo-Hermes repository on GitHub; these links point at the commit this page was built from.
Ricardo-Hermes: common questions
What microcontroller does the Ricardo-Hermes use?
The Ricardo-Hermes is built around the ESP32-S3, from the ESP32 family.
How big is the Ricardo-Hermes PCB?
The Ricardo-Hermes measures 43 × 65 mm, has 4 copper layers and is 1.6062 mm thick.
How many components are on the Ricardo-Hermes?
114 components, from 62 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 Ricardo-Hermes design files?
From the icl-rocketry/Ricardo-Hermes 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 Ricardo-Hermes design in my own project?
The repository has no license, so all rights stay with icl-rocketry. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Ricardo-Hermes 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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