6 layers70 × 80 mm
Cm5-carrier v2
ben5049/cm-carrier-hardware
Compact CM5 carrier board with an M.2 E-key connector and a 1000BASE-T1 Ethernet PHY, as well as other optional IO.
334 parts1AGPL-3.0
4 layers145.5 × 64 mm
Muffin
JunOllyLi/TX_PCB17NOTE: the latest PCB had been manufactured was v2.0. But it had the Gimbal ZH-connector reversed. The schematics and PCB drawing had been updated to v2.1 to fix that. But v2.1 had not been really manufactured yet.
- Size
- 145.5 × 64 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 138
- Nets
- 183
- Pads
- 687
- Tracks, vias
- 995, 244
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 6 Apr 2024
- Updated
- 2 Aug 2025
Overview
Muffin is an open-source printed circuit board by JunOllyLi, from the JunOllyLi/TX_PCB repository on GitHub. It is a 4-layer board of 145.5 × 64 mm with 138 parts on 183 nets, routed with 995 tracks and 244 vias.
It is built around the ESP32-S3-WROOM-1U-N4, MCP73871EV and ADS1015IDGS, with the TPS62827DMQR, DS3231MZ/V+ and LESD5D5.0CT1G among its other parts. Its parts include 45 resistors, 36 capacitors, 20 connectors, 13 ICs and 10 diodes. It belongs with the ESP32 boards of this library.
Main components
9
ESP32-S3-WROOM-1U-N4
SMD,19.2x18mm-103.5dBm -40℃~+85℃ 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 UART、SPI、I2C、I2S、USB SMD,19.2x18mm WiFi Modules ROHSEspressif SystemsWiFi ModulesMCP73871EV
-ModulesMicrochip Technology
ADS1015IDGS
VSSOP-10-0.5mm-40℃~+125℃ 0.5LSB 12 128Hz、250Hz、490Hz、920Hz、1.6kHz、2.4kHz、3.3kHz 1MHz 2 2V~5.5V 2uA 3.3kHz 5ppm/℃ 6.144V Built-in Built-in I2C Sigma-Delta Support Yes VSSOP-10-0.5mm Analog to Digital Converters (ADC) ROHSTexas InstrumentsAnalog To Digital Converters (ADC)
TPS62827DMQR
VSON-6(1.5x1.5)-40℃~+125℃@(TJ) 1 2.2MHz 2.5V~5.5V 4A 4uA 600mV~4V Adjustable Buck Buck Built-in Yes VSON-6(1.5x1.5) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
DS3231MZ/V+
SOIC-8-40℃~+85℃ 2.3V~5.5V Built-in I2C Temperature compensation、Backup power management and battery charging、Alarm function、Locking and tamper-proof、Periodic interrupt output SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
LESD5D5.0CT1G
SOD-523-55℃~+150℃ 100W 12pF 16V 1uA 5V 7A 7V Bidirectional ESD IEC 61000-4-2 SOD-523 ESD and Surge Protection (TVS/ESD) ROHSGOODWORKUncategorised
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
MBT3904DW1
SOT-363-55℃~+150℃ 100 150mW 2 NPN 200mA 300MHz 300mV 40V 50nA 6V NPN SOT-363 Bipolar (BJT) ROHSonsemiBipolar (BJT)
README
README.mdNOTE: the latest PCB had been manufactured was v2.0. But it had the Gimbal ZH-connector reversed. The schematics and PCB drawing had been updated to v2.1 to fix that. But v2.1 had not been really manufactured yet.
By default, Muffin is designed to use FlySky hall gimblal, over UART. However, if any other gimbals can be used with two wires (4 including GND and 3.3V), SW can be modified to use that.
Two RF module interfaces were designed. Although the name of them are for INTMOD and EXTMOD, SW can totally choose how they were used. The default configuration has the ELRS module connected to INTMOD and 4in1 connected to EXTMOD.
Those two modules have their own individual 5V power supply, controled by SW. The PPM in/out on the back of FS6 shares the same signal pins of the EXTMOD.
And again, although the default design for them are UART and PPM, SW can totally choose other two wires protocol. ESP32 is very flexible regarding pin muxing.
BOM (parts not listed in the schematics)
- display module: IL9488 https://www.aliexpress.us/item/3256803764394132.html?spm=a2g0o.order_list.order_list_main.46.48c41802DB5b2D&gatewayAdapt=glo2usa
- CPU ESP32S3 N16R8: https://www.aliexpress.us/item/3256805164206118.html?spm=a2g0o.order_list.order_list_main.61.48c41802DB5b2D&gatewayAdapt=glo2usa
- Zorro 4in1 module
- Zorro ELRS module
Parts
138| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C4, C5, C6, C8, C9, C11, C12, C15, C17, C21, C27, C31, C32, C34 |
| 9 | 100K | Resistor_SMD:R_0603_1608Metric | R5, R6, R7, R8, R25, R27, R32, R36, R41 |
| 8 | 1K | Resistor_SMD:R_0603_1608Metric | R20, R29, R30, R35, R37, R38, R39, R40 |
| 7 | 10uF | Capacitor_SMD:C_0603_1608Metric | C14, C16, C19, C28, C29, C30, C33 |
| 6 | 1uF | Capacitor_SMD:C_0603_1608Metric | C3, C7, C10, C13, C20, C26 |
| 6 | LESD5D5.0CT1G | Diode_SMD:D_SOD-523 | D1, D3, D4, D5, D6, D7 |
| 5 | 100 | Resistor_SMD:R_0603_1608Metric | R15, R16, R17, R18, R19 |
| 4 | 5.1K | Resistor_SMD:R_0603_1608Metric | R1, R2, R23, R24 |
| 3 | 10K | Resistor_SMD:R_0603_1608Metric | R3, R4, RT2 |
| 3 | 22uF | Capacitor_SMD:C_0603_1608Metric | C22, C23, C25 |
| 2 | 0 | Resistor_SMD:R_0603_1608Metric | R44, RT1 |
| 2 | 1.2K | Resistor_SMD:R_0603_1608Metric | R11, R13 |
| 2 | 1.5K | Resistor_SMD:R_0603_1608Metric | R21, R22 |
| 2 | 1M | Resistor_SMD:R_0603_1608Metric | R9, R28 |
| 2 | 2.4K | Resistor_SMD:R_0603_1608Metric | R12, R14 |
| 2 | 220pF | Capacitor_SMD:C_0603_1608Metric | C35, C36 |
| 2 | 732K | Resistor_SMD:R_0603_1608Metric | R10, R31 |
| 2 | ADS1015IDGS | Package_SO:TSSOP-10_3x3mm_P0.5mm | U2, U3 |
| 2 | LED | LED_SMD:LED_0603_1608Metric | D9, D10 |
| 2 | MCP23017_ML | Package_DFN_QFN:QFN-28-1EP_6x6mm_P0.65mm_EP4.25x4.25mm | U11, U12 |
| 2 | SS14 | Diode_SMD:D_SMA | D2, D8 |
| 2 | SiP32431DR3 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U6, U9 |
| 2 | USB_C | my_footprints:my_USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1, J13 |
| 1 | 0.47uH | Inductor_SMD:L_Cenker_CKCS4020 | L2 |
| 1 | 10 | Resistor_SMD:R_0603_1608Metric | R26 |
| 1 | 120pF | Capacitor_SMD:C_0603_1608Metric | C24 |
| 1 | 1uH | Inductor_SMD:L_Cenker_CKCS4020 | L1 |
| 1 | 20K | Resistor_SMD:R_0603_1608Metric | R34 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C18 |
| 1 | 430K | Resistor_SMD:R_0603_1608Metric | R33 |
| 1 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | CP2102N-Axx-xQFN24 | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U1 |
| 1 | DS3231MZ | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | ESP32-S3-WROOM-1U | my_footprints:ESP32-S3-WROOM-1U | U4 |
| 1 | EXTMOD | Connector_Molex:Molex_PicoBlade_53398-0571_1x05-1MP_P1.25mm_Vertical | J15 |
| 1 | Gimbal | Connector_JST:JST_ZH_B4B-ZR-SM4-TF_1x04-1MP_P1.50mm_Vertical | J12 |
| 1 | I2C_STEMMA | Connector_JST:JST_SH_BM04B-SRSS-TB_1x04-1MP_P1.00mm_Vertical | J10 |
| 1 | INTMOD | Connector_Molex:Molex_PicoBlade_53398-0571_1x05-1MP_P1.25mm_Vertical | J18 |
| 1 | KEY_DOWN | my_footprints:SW_6.2mm | SW8 |
| 1 | KEY_ENTER | my_footprints:SW_6.2mm | SW5 |
| 1 | KEY_EXIT | my_footprints:SW_6.2mm | SW6 |
| 1 | KEY_MENU | my_footprints:SW_12mm | SW9 |
| 1 | KEY_UP | my_footprints:SW_6.2mm | SW7 |
| 1 | LCD | my_footprints:FPC_40PIN_TOP | J20 |
| 1 | LEDs | Connector_JST:JST_GH_BM10B-GHS-TBT_1x10-1MP_P1.25mm_Vertical | J9 |
| 1 | LIPO | Connector_AMASS:AMASS_XT30UPB-M_1x02_P5.0mm_Vertical | J21 |
| 1 | MAX98357A | Package_DFN_QFN:TQFN-16-1EP_3x3mm_P0.5mm_EP1.23x1.23mm | U13 |
| 1 | MBT3904DW1 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q1 |
| 1 | MCP73871 | Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm | U10 |
| 1 | Micro_SD_Card | my_footprints:MicroSD | J17 |
| 1 | NP | Resistor_SMD:R_0603_1608Metric | R45 |
| 1 | SWA | Connector_JST:JST_GH_BM03B-GHS-TBT_1x03-1MP_P1.25mm_Vertical | J3 |
| 1 | SWB | Connector_JST:JST_GH_BM03B-GHS-TBT_1x03-1MP_P1.25mm_Vertical | J2 |
| 1 | SWC | Connector_JST:JST_GH_BM03B-GHS-TBT_1x03-1MP_P1.25mm_Vertical | J4 |
| 1 | SWD | Connector_JST:JST_GH_BM03B-GHS-TBT_1x03-1MP_P1.25mm_Vertical | J5 |
| 1 | SW_Slide_DPDT | my_footprints:SW_SLIDE_DPDT_7mm | SW10 |
| 1 | Speaker | Connector_Molex:Molex_PicoBlade_53398-0271_1x02-1MP_P1.25mm_Vertical | J24 |
| 1 | TPS61023DRLR | Package_TO_SOT_SMD:Texas_R-PDSO-N6_DRL-6 | U8 |
| 1 | TPS62827DMQR | my_footprints:DMQ_6 | U7 |
| 1 | TRAINER | my_footprints:JST_ZH1.50mm_6_PIN_Vertical | J11 |
| 1 | TRIMS | my_footprints:JST_ZH1.50mm_6_PIN_Vertical | J8 |
| 1 | TRIM_AIL_LEFT | my_footprints:SW_6.2mm | SW3 |
| 1 | TRIM_AIL_RIGHT | my_footprints:SW_6.2mm | SW4 |
| 1 | TRIM_RUD_RIGHT | my_footprints:SW_6.2mm | SW2 |
| 1 | TRRIM_RUD_LEFT | my_footprints:SW_6.2mm | SW1 |
| 1 | TouchPanel | my_footprints:FPC_6PIN_BOTTOM | J19 |
| 1 | VRA | Connector_JST:JST_GH_BM03B-GHS-TBT_1x03-1MP_P1.25mm_Vertical | J6 |
| 1 | VRB | Connector_JST:JST_GH_BM03B-GHS-TBT_1x03-1MP_P1.25mm_Vertical | J7 |
Questions
How big is the Muffin PCB?
It measures 145.5 × 64 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Muffin use?
138 parts, built around the ESP32-S3-WROOM-1U-N4, MCP73871EV, ADS1015IDGS and TPS62827DMQR. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Muffin KiCad files?
From the JunOllyLi/TX_PCB repository on GitHub, at the commit this page was made from: the board is Muffin/Muffin.kicad_pcb and its schematic Muffin/GPIO.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Muffin design in my own project?
Its repository states no licence, so its author keeps all rights: ask JunOllyLi before reusing the design.
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