Mycelium
About the Mycelium PCB
Mycelium is an open source AVR/Arduino PCB design by microresearch, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 74.5 × 83.7 mm, with 126 components from 64 distinct parts.
Its main chip is the ATMEGA168A-AU, from the AVR/Arduino family. Other key parts include the LM1117-3.3, MCP602, HEF4093B, 74HC04 and OP07. By type, the board carries 40 connectors, 33 capacitors, 31 resistors, 7 ICs, 5 jumpers and 2 transistors.
Main components on the Mycelium
Mycelium bill of materials (BOM)
126 components, 64 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATMEGA168A-AU | TQFP-32_7x7mm_Pitch0.8mm | U1 |
| 1 | LM1117-3.3 | TO-263-2 | U2 |
| 1 | MCP602 | SOIC-8-N | U3 |
| 1 | HEF4093B | SOIC-14_3.9x8.7mm_Pitch1.27mm | U4 |
| 1 | 74HC04 | SOIC-14_N | U5 |
| 1 | OP07 | SOIC-8-N | U6 |
| 1 | LMC555xM | SOIC-8-N | U7 |
| 1 | HIH6131 | SOIC-8-N | M1 |
| 1 | BC547 | SOT-23_Handsoldering | Q1 |
| 1 | Q_PMOS_GSD | SOT-23_Handsoldering | Q2 |
| 1 | 16 MHz | Crystal_SMD_HC49-SD_HandSoldering | Y1 |
| 1 | BREAKOUT | SolderWirePad_single_1mmDrill | J1 |
| 2 | Conn_01x08 | Socket_Strip_Straight_1x08_Pitch2.54mm | J2, J10 |
| 16 | BREAKOUT | SolderWirePad_single_SMD_5x10mm | J3, J4, J11, J12, J13, J14, J15, J16 +8 |
| 2 | CAP | SolderWirePad_single_1mmDrill | J5, J6 |
| 1 | CONN_01X06 | Socket_Strip_Straight_1x06_Pitch2.54mm | J7 |
| 1 | Micro_SD_Card | microSD_Card_Receptacle_Wurth_693072010801 | J8 |
| 1 | C | SolderWirePad_single_1mmDrill | J9 |
| 1 | CONN_01X01 | SolderWirePad_single_1mmDrill | J18 |
| 10 | EDGE | SolderWirePad_single_SMD_5x10mm | J19, J20, J21, J23, J27, J28, J29, J39 +2 |
Show 44 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Conn_01x02 | Socket_Strip_Straight_1x02_Pitch2.54mm | J22 |
| 1 | ANTENNA | SolderWirePad_single_1mmDrill | J24 |
| 1 | RFIN | SolderWirePad_single_1mmDrill | J30 |
| 2 | MUSH | SolderWirePad_single_1mmDrill | J31, J32 |
| 4 | J | R_0805_HandSoldering | JP1, JP2, JP3, JP4 |
| 1 | Jumper_NO_Small | R_0805_HandSoldering | JP5 |
| 1 | 10K | Potentiometer_Trimmer-23Breichelt_larger | RV1 |
| 1 | 2.5K | Potentiometer_Trimmer-23Breichelt | RV2 |
| 1 | 10K | Potentiometer_Trimmer-23Breichelt | RV3 |
| 1 | LED_Small | LED_0805_HandSoldering | D1 |
| 1 | COIL | INDUCTOR_V | L1 |
| 1 | blocking | D_0603 | L2 |
| 2 | 10nF | C_0805_HandSoldering | C1, C27 |
| 1 | 1uF | CP_Tantalum_Case-A_EIA-3216-18_Hand | C2 |
| 1 | 1nF | C_0805_HandSoldering | C3 |
| 1 | 10pF-50pF | C_Trimmer_Murata_TZC3 | C4 |
| 8 | 100nF | C_0805_HandSoldering | C5, C6, C7, C22, C26, C28, C31, C33 |
| 3 | 10uF | CP_Tantalum_Case-A_EIA-3216-18_Hand | C8, C9, C19 |
| 1 | 10pf or replace conns | C_0805 | C10 |
| 2 | 100nF | C_0805 | C11, C12 |
| 2 | 100pF | C_0805 | C13, C14 |
| 1 | 10nF | C_0805 | C16 |
| 1 | 1nF | C_0805 | C17 |
| 1 | 330nF | C_0805 | C18 |
| 2 | 33pF | C_0805_HandSoldering | C20, C21 |
| 1 | 10pF | C_0805_HandSoldering | C23 |
| 2 | 22pF | C_0805_HandSoldering | C24, C25 |
| 3 | 2.2uF | CP_Tantalum_Case-A_EIA-3216-18_Hand | C29, C30, C32 |
| 1 | 220nF | C_0805_HandSoldering | C34 |
| 1 | 68R | R_0805_HandSoldering | R1 |
| 3 | 100K | R_0805_HandSoldering | R2, R3, R27 |
| 13 | 10K | R_0805_HandSoldering | R4, R5, R7, R10, R11, R12, R13, R14 +5 |
| 1 | 27K | R_0805_HandSoldering | R6 |
| 1 | 470R | R_0805_HandSoldering | R8 |
| 1 | 15K | R_0805_HandSoldering | R9 |
| 1 | 1k5 | R_0805_HandSoldering | R16 |
| 1 | 6.8K | R_0805_HandSoldering | R17 |
| 2 | 4.7K | R_0805_HandSoldering | R18, R20 |
| 1 | 47K | R_0805_HandSoldering | R19 |
| 2 | 1K | R_0805_HandSoldering | R21, R22 |
| 1 | 330R | R_0805_HandSoldering | R23 |
| 1 | 100R | R_0805_HandSoldering | R26 |
| 1 | 390R | R_0805_HandSoldering | R28 |
| 1 | 150K | R_0805_HandSoldering | R29 |
Mycelium design files
The KiCad project lives in the microresearch/mycelium repository on GitHub; these links point at the commit this page was built from.
Mycelium: common questions
What microcontroller does the Mycelium use?
The Mycelium is built around the ATMEGA168A-AU, from the AVR/Arduino family.
How big is the Mycelium PCB?
The Mycelium measures 74.5 × 83.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Mycelium?
126 components, from 64 distinct parts. The full bill of materials is listed on this page.
Where can I download the Mycelium design files?
From the microresearch/mycelium repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Mycelium design in my own project?
Yes, under the terms of its GPL-3.0 license, which microresearch chose for the repository.
Can I test firmware for the Mycelium without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
More boards in mycelium
AVR/ArduinoMycleium pcb before thereminchange
74.5 × 83.7 mm126 parts2LGPL-3.05
Mycelium pcb radio
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Earthboot
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Earthboot withnewsoldermask
49.7 × 130.1 mm42 parts2LGPL-3.05
Mycelium pcb sensor
74.5 × 83.7 mm38 parts2LGPL-3.05
AVR/ArduinoMycelium pcb micro
74.5 × 83.7 mm28 parts2LGPL-3.05
Small mycelium
38.8 × 38.8 mm10 parts2LGPL-3.05
Small mycelium onesided
38.8 × 38.8 mm10 parts2LGPL-3.05
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