MIDAS MK1
About the MIDAS MK1 PCB
MIDAS MK1 is an open source ESP32 PCB design by ISSUIUC, published on GitHub. It is a 4-layer board measuring 60 × 100 mm, with 201 components from 76 distinct parts.
Its main chip is the ESP32-S3-WROOM-1U, from the ESP32 family. Other key parts include the TCAL9539-Q1, MCP251863, ADS7138-Q1, MTFCxxxx and ECMF02-2AMX6. By type, the board carries 75 capacitors, 72 resistors, 21 ICs, 13 connectors, 6 diodes and 5 transistors.
It belongs with the sensors designs in this gallery.
From the project
Building custom flight computers
MIDAS MK1 is the fifth generation of the Illinois Space Society's SRAD avionics systems and the first to serve as a full-fledged rocketry altimeter. Combining the functionality of TARS together with the advanced pyrotechnic circuitry seen on many commercial models into a smaller form factor, MIDAS facilitates data collection, telemetry, and execution of inflight events. More than just a single unit, MIDAS is intended for placement on multiple stages of a rocket and can serve as a center of more complex avionics networks such as our onboard live video system.
Main components on the MIDAS MK1
MIDAS MK1 bill of materials (BOM)
201 components, 76 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | TCAL9539-Q1 | WQFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U101, U102, U103 |
| 1 | MCP251863 | SSOP-28 | U104 |
| 1 | ADS7138-Q1 | WQFN-16-1EP_3x3mm_P0.5mm_EP1.68x1.68mm | U105 |
| 1 | MTFCxxxx | TFBGA-153_11.5x13mm | U106 |
| 1 | ESP32-S3-WROOM-1U | ESP32-S3-WROOM-1U | U107 |
| 1 | ECMF02-2AMX6 | ST_UQFN-6L_1.5x1.7mm_P0.5mm | U108 |
| 1 | LM74670-Q1 | VSSOP-8_3.0x3.0mm_P0.65mm | U201 |
| 1 | TPS2121 | VQFN-HR-RUX0012A | U301 |
| 2 | TI_TPS566242 | SOT-563 | U302, U303 |
| 1 | RFM96W-433S2 | HOPERF_RFM9XW_SMD | U401 |
| 1 | BGA725L6 | Infineon_TSNP-6-2 | U402 |
| 1 | Teseo-LIV3R | Teseo-LIV3R | U403 |
| 1 | KX134-1211 | LGA-12_2x2mm_P0.5mm | U501 |
| 1 | ADXL355 | Analog_LGA_14-7.4x7.4mm | U502 |
| 1 | LSM6DSLTR | Bosch_LGA-14_3x2.5mm_P0.5mm | U503 |
| 1 | BNO086 | LGA-28_5.2x3.8mm_P0.5mm | U504 |
| 1 | LIS3MDL | LGA-12_2x2mm_P0.5mm | U505 |
| 1 | MS5611-01BA03 | LGA-8_3x5mm_P1.25mm | U506 |
| 5 | DMNH6022SSDQ | SO-8_3.9x4.9mm_P1.27mm | Q201, Q202, Q203, Q204, Q205 |
| 1 | 40MHz | Crystal_SMD_Abracon_ABM10-4Pin_2.5x2.0mm | Y101 |
Show 56 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | Conn_01x02 | PinSocket_1x02_P2.54mm_Vertical | J101, J102 |
| 1 | Left | Molex_Terminal-Block_393570010_1x10_P3.5mm | J103 |
| 1 | ~ | JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J104 |
| 1 | Right | Molex_Terminal-Block_393570010_1x10_P3.5mm | J105 |
| 1 | USB4105-GF-A | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J106 |
| 1 | 2157601003 | Molex_Micro-Fit-Plus_2157601003_1x03_P3.0mm | J107 |
| 1 | PJS008-4100-0-VE | PJS008-4100-0-VE | J108 |
| 1 | Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J109 |
| 1 | ~ | PinHeader_1x03_P2.54mm_Vertical | J110 |
| 1 | TestPoint | TestPoint_THTPad_D1.0mm_Drill0.5mm | J301 |
| 2 | SMA | SMA_Molex_732511153_EdgeMount_Horizontal | J401, J402 |
| 1 | AT-0927-TT-6-R | Buzzer_AT-0927-TT-6-R | BZ101 |
| 1 | B4327 | Qualcomm_SMD-5 | FL401 |
| 2 | SW_Push | SW_SPST_FSMSM | SW101, SW102 |
| 1 | RED LED | LED_0603_1608Metric | D101 |
| 1 | ORANGE LED | LED_0603_1608Metric | D102 |
| 1 | GREEN LED | LED_0603_1608Metric | D103 |
| 1 | BLUE LED | LED_0603_1608Metric | D104 |
| 2 | BZT52H-A5V1-QX | D_SOD-123F | D302, D303 |
| 2 | 2.2uH | L_TDK_SPM6530 | L301, L302 |
| 1 | 5.6nH | L_0603_1608Metric | L401 |
| 1 | 27nH | L_0603_1608Metric | L402 |
| 30 | 0.1uF | C_0603_1608Metric | C101, C102, C104, C105, C109, C112, C114, C117 +22 |
| 12 | 1uF | C_0603_1608Metric | C103, C108, C110, C111, C115, C201, C301, C501 +4 |
| 2 | 18pF | C_0603_1608Metric | C106, C107 |
| 9 | 22uF | C_0603_1608Metric | C113, C308, C309, C310, C311, C312, C313, C314 +1 |
| 9 | 2.2uF | C_0603_1608Metric | C116, C118, C120, C122, C124, C126, C128, C130 +1 |
| 5 | 10uF | C_0603_1608Metric | C304, C305, C306, C307, C402 |
| 1 | 140pF | C_0603_1608Metric | C401 |
| 1 | 1nF | C_0603_1608Metric | C403 |
| 1 | 120pF | C_0603_1608Metric | C404 |
| 3 | 56pF | C_0603_1608Metric | C405, C406, C407 |
| 2 | 100nF | C_0603_1608Metric | C517, C518 |
| 12 | 10k | R_0603_1608Metric | R101, R102, R103, R104, R105, R106, R128, R209 +4 |
| 3 | 100k | R_0603_1608Metric | R107, R118, R120 |
| 5 | 50k | R_0603_1608Metric | R109, R110, R111, R114, R115 |
| 2 | 22 | R_0603_1608Metric | R112, R113 |
| 1 | 50 | R_0603_1608Metric | R116 |
| 1 | 120 | R_0603_1608Metric | R117 |
| 3 | 220k | R_0603_1608Metric | R119, R121, R318 |
| 2 | 5.1k | R_0603_1608Metric | R122, R123 |
| 4 | 470 | R_0603_1608Metric | R124, R125, R126, R127 |
| 8 | 3.3k | R_0603_1608Metric | R201, R202, R203, R204, R213, R214, R215, R216 |
| 8 | 1k | R_0603_1608Metric | R205, R206, R207, R208, R217, R218, R219, R220 |
| 4 | 22k | R_0603_1608Metric | R211, R212, R223, R224 |
| 1 | 7.3k | R_0603_1608Metric | R301 |
| 4 | 5k | R_0603_1608Metric | R302, R304, R306, R308 |
| 1 | 23.3k | R_0603_1608Metric | R303 |
| 1 | 44k | R_0603_1608Metric | R305 |
| 1 | 65k | R_0603_1608Metric | R307 |
| 1 | 0 | R_0603_1608Metric | R309 |
| 1 | 18.7k | R_0603_1608Metric | R310 |
| 2 | 20k | R_0603_1608Metric | R311, R312 |
| 4 | 30k | R_0603_1608Metric | R313, R314, R315, R316 |
| 1 | 135k | R_0603_1608Metric | R317 |
| 2 | 2.2k | R_0603_1608Metric | R502, R503 |
MIDAS MK1 design files
The KiCad project lives in the ISSUIUC/ISS-PCB repository on GitHub; these links point at the commit this page was built from.
MIDAS MK1: common questions
What microcontroller does the MIDAS MK1 use?
The MIDAS MK1 is built around the ESP32-S3-WROOM-1U, from the ESP32 family.
How big is the MIDAS MK1 PCB?
The MIDAS MK1 measures 60 × 100 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the MIDAS MK1?
201 components, from 76 distinct parts. The full bill of materials is listed on this page.
Where can I download the MIDAS MK1 design files?
From the ISSUIUC/ISS-PCB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the MIDAS MK1 design in my own project?
The repository has no license, so all rights stay with ISSUIUC. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the MIDAS MK1 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 ISS-PCB
STM32BAGEL Switch MK1.1
70 × 70 mm201 parts4LNo license31
ESP32MIDAS MK1.1
60 × 100 mm199 parts4LNo license31
STM32BAGEL Switch MK1
70 × 70 mm189 parts4LNo license31
ESP32MIDAS MK2.1
45 × 100 mm186 parts4LNo license31
ESP32MIDAS Mini MK1
25 × 80 mm122 parts4LNo license31
RP2040/RP2350Stargazer Camera Board
40 × 60 mm110 parts2LNo license31
ESP32Stargazer Camera Board MK2.1
40 × 40 mm108 parts4LNo license31
NXPSPARK Pyrotechnic Testing Board
100 × 80 mm70 parts2LNo license31
ESP32EAGLE Video Receiver
50 × 55 mm65 parts4LNo license31
ESP32MotorBoard MK1
65 × 70 mm59 parts4LNo license31
ESP32Feather Duo
40 × 40 mm39 parts4LNo license31
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