MIDAS MK2.1
About the MIDAS MK2.1 PCB
MIDAS MK2.1 is an open source ESP32 PCB design by ISSUIUC, published on GitHub. It is a 4-layer board measuring 45 × 100 mm, with 186 components from 76 distinct parts.
Its main chip is the ESP32-S3-MINI-1U, from the ESP32 family. Other key parts include the INA745x, TCAL9539-Q1, MCP2518FDT-xSL, ZDSD64GLGEAG-R and TCAN337G. By type, the board carries 73 resistors, 53 capacitors, 27 ICs, 13 connectors, 10 diodes and 4 inductors.
It belongs with the rf & radio and sensors designs in this gallery.
From the project
Building custom flight computers
MIDAS MK2 is the new and improved generation of the Illinois Space Society's MIDAS flight computer. Continuing MIDAS’s mission as the centerpiece of a flexible avionics ecosystem, MK2 features data acquisition, live telemetry, board-to-board communication interfaces, and pyrotechnic capabilities for in-flight control. This new revision retains the diverse suite of sensors from the original and features upgraded pyro circuitry with an emphasis on redundancy and reliability. As the team pushes closer and closer to space, MK2 employs a new generation of LoRa radios with 60% higher transmit power…
Main components on the MIDAS MK2.1
MIDAS MK2.1 bill of materials (BOM)
186 components, 76 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | INA745x | VQFN-REL0014B | U101, U201 |
| 3 | TCAL9539-Q1 | WQFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U102, U103, U205 |
| 1 | ESP32-S3-MINI-1U | ESP32-S2-MINI-1U | U104 |
| 1 | MCP2518FDT-xSL | SOIC-14_3.9x8.7mm_P1.27mm | U105 |
| 1 | ZDSD64GLGEAG-R | LGA-8_8x6.2mm_P1.27mm | U106 |
| 1 | TCAN337G | SOT-23-8 | U107 |
| 1 | ECMF02-2AMX6 | ST_UQFN-6L_1.5x1.7mm_P0.5mm | U108 |
| 1 | NPC45560-H | DFN-12-1EP_3x3mm_P0.5mm_EP2.05x2.86mm | U202 |
| 1 | ISOW7742 | SOIC-20W_7.5x12.8mm_P1.27mm | U203 |
| 1 | ISO1640BDR | SOIC-8_3.9x4.9mm_P1.27mm | U204 |
| 1 | ADS122C04IRTE | Texas_RTE0016D_WQFN-16-1EP_3x3mm_P0.5mm_EP0.8x0.8mm | U206 |
| 2 | TVS1800DRV | WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm | U301, U302 |
| 1 | TI_TPS566242 | SOT-563 | U303 |
| 1 | TPS2121 | Texas_VQFN-HR-12_2x2.5mm_P0.5mm | U304 |
| 1 | RFM96W-433S2 | HOPERF_RFM9XW_SMD | U401 |
| 1 | NC7WZ07 | SOT-363_SC-70-6 | U402 |
| 1 | MAX-M10S | ublox_MAX | 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 |
Show 56 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 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 |
| 2 | Si7232DN | Vishay_PowerPAK_1212-8_Dual | Q201, Q202 |
| 1 | Si1016X | SOT-563 | Q401 |
| 1 | 40MHz | Crystal_SMD_Abracon_ABM10-4Pin_2.5x2.0mm | Y101 |
| 1 | USB4105-GF-A | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J101 |
| 1 | Left | Molex_Terminal-Block_393570010_1x10_P3.5mm | J102 |
| 1 | Conn_01x03 | Molex_Micro-Lock_2200980371_1x03_P1.25mm_Horizontal | J103 |
| 1 | Right | Molex_Terminal-Block_393570010_1x10_P3.5mm | J104 |
| 2 | Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J105, J106 |
| 1 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J107 |
| 1 | Conn_01x03 | JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J108 |
| 2 | Conn_01x02 | PinSocket_1x02_P2.54mm_Vertical | J201, J302 |
| 1 | TestPoint | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | J301 |
| 2 | SMA | SMA_Molex_73251-2120_EdgeMount_Horizontal | J401, J402 |
| 1 | AT-0927-TT-6-R | Buzzer_AT-0927-TT-6-R | BZ101 |
| 1 | B3913 | Qualcomm_SMD-6 | FL401 |
| 2 | ESD321 | D_SOD-523 | D101, D102 |
| 2 | RED LED | LED_0603_1608Metric | D103, D303 |
| 1 | ORANGE LED | LED_0603_1608Metric | D104 |
| 1 | GREEN LED | LED_0603_1608Metric | D105 |
| 1 | BLUE LED | LED_0603_1608Metric | D106 |
| 1 | RSX501LAM20 | D_SOD-128 | D201 |
| 1 | BZT52H-A5V1-QX | D_SOD-123F | D301 |
| 1 | BAS416 | D_SOD-323 | D302 |
| 2 | BLM18SG331TN1D | L_0603_1608Metric | FB201, FB202 |
| 1 | 2.2uH | L_TDK_SPM6530 | L301 |
| 1 | 27nH | L_0603_1608Metric | L401 |
| 28 | 0.1uF | C_0603_1608Metric | C101, C102, C103, C107, C108, C109, C110, C201 +20 |
| 2 | 22pF | C_0603_1608Metric | C104, C105 |
| 5 | 22uF | C_0603_1608Metric | C106, C304, C305, C306, C307 |
| 9 | 1uF | C_0603_1608Metric | C111, C204, C205, C308, C501, C503, C505, C509 +1 |
| 3 | 10nF | C_0603_1608Metric | C202, C203, C402 |
| 5 | 10uF | C_0603_1608Metric | C206, C207, C302, C303, C401 |
| 1 | 47pF | C_0603_1608Metric | C403 |
| 6 | 4.7k | R_0603_1608Metric | R101, R104, R105, R106, R220, R222 |
| 10 | 10k | R_0603_1608Metric | R102, R103, R107, R108, R114, R201, R221, R223 +2 |
| 5 | 50k | R_0603_1608Metric | R109, R110, R111, R112, R113 |
| 8 | 0 | R_0603_1608Metric | R115, R116, R117, R118, R119, R120, R121, R312 |
| 1 | 120 | R_0603_1608Metric | R122 |
| 2 | 5.1k | R_0603_1608Metric | R123, R124 |
| 2 | 20k | R_0603_1608Metric | R125, R303 |
| 5 | 470 | R_0603_1608Metric | R126, R127, R128, R129, R315 |
| 5 | 1k | R_0603_1608Metric | R202, R206, R207, R214, R215 |
| 6 | 5k | R_0603_1608Metric | R203, R301, R302, R305, R308, R310 |
| 4 | 3.3k | R_0603_1608Metric | R204, R205, R212, R213 |
| 5 | 100k | R_0603_1608Metric | R208, R209, R216, R217, R402 |
| 6 | 30k | R_0603_1608Metric | R210, R211, R218, R219, R306, R311 |
| 1 | 27k | R_0603_1608Metric | R304 |
| 1 | 33k | R_0603_1608Metric | R307 |
| 1 | 69.8k | R_0603_1608Metric | R309 |
| 1 | 135k | R_0603_1608Metric | R313 |
| 1 | 21.5k | R_0603_1608Metric | R314 |
| 1 | 10 | R_0603_1608Metric | R401 |
| 2 | 2.2k | R_0603_1608Metric | R502, R503 |
MIDAS MK2.1 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 MK2.1: common questions
What microcontroller does the MIDAS MK2.1 use?
The MIDAS MK2.1 is built around the ESP32-S3-MINI-1U, from the ESP32 family.
How big is the MIDAS MK2.1 PCB?
The MIDAS MK2.1 measures 45 × 100 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the MIDAS MK2.1?
186 components, from 76 distinct parts. The full bill of materials is listed on this page.
Where can I download the MIDAS MK2.1 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 MK2.1 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 MK2.1 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
60 × 100 mm201 parts4LNo license31
ESP32MIDAS MK1.1
60 × 100 mm199 parts4LNo license31
STM32BAGEL Switch MK1
70 × 70 mm189 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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