2 layers26 × 32.4 mm
OpenEMG2
CGrassin/OpenEMG
OpenEMG is an open-hardware, easy to make, EMG module to measure muscle activity.
32 parts54MIT
2 layers
Spymic
ILikeMice/spymicNot too many, this is a v1 and i might make a v2 if this thing is good enough! For now, this just takes the 35mm piezos input and amplifies it into a headphone jack, sadly i couldnt add more since the deadline is in a…
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 31
- Nets
- 22
- Pads
- 91
- Tracks, vias
- 131, 6
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Aug 2026
- Updated
- 23 Aug 2026
Overview
Spymic is an open-source printed circuit board by ILikeMice, from the ILikeMice/spymic repository on GitHub. It is a 2-layer board with 31 parts on 22 nets, routed with 131 tracks and 6 vias.
It is built around the K7805M-1000R3, LM321H-TR and ICL7660M/TR, with the XC6206P332MR-G, XC62KN3302PR-G and RK09K1130081 among its other parts. Its parts include 12 capacitors, 8 resistors, 5 ICs and 2 connectors.
Main components
7
K7805M-1000R3
SIP-3-40℃~+85℃ 1 10.4mm 11.6mm 1A 2200uF 25mVp-p 300uA、1mA 520kHz 5V 7V~36V 8mm 94% Buck-Boost Short Circuit Protection ±3% SIP-3 DC-DC Power Modules ROHSYLPTECDC-DC Power Modules
LM321H-TR
SOT-23-5-18V~-1.5V、1.5V~18V -25℃~+85℃ 1 1MHz 200V/ms 20nA 250uA 3V~36V 5mV 5nA 60mA 7uV/℃ 80dB Built-in compensation SOT-23-5 Operational Amplifier ROHSGainsilOperational Amplifier
ICL7660M/TR
SOP-8-25℃~+60℃ 100Ω 10kHz 175uA 3V~9.5V 98% Inverted SOP-8 Charge Pumps ROHSHGSEMICharge Pumps
XC6206P332MR-G
UncategorisedUnknown maker
XC62KN3302PR-G
SOT-89-3-40℃~+85℃ 1 10V 120mV 3.3V 3uA 60mA Fixed Negative Over Current Protection、Over Temperature Protection SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
RK09K1130081
插件10kΩ 20V 50mW ±20% 插件 Potentiometers, Variable Resistors ROHSALPSALPINEPotentiometers & Variable Resistors
PJ-320D
SMD-30℃~+70℃ 12V 1A 3.5mm Headphone Jack Copper Gold SMD Audio Connectors ROHSSHOU HANAudio Connectors
README
README.mdspymic
-
Made for https://ispy.hackclub.com, this thing is supposed to latch onto doors (or any other suitable surface for that matter!) and press its piezo disk onto the surface, listening to any sound that reaches the door from inside the room!
-
The LCSC BOM is in the repo, thats pretty much all the components you need! Also, you need a 35mm piezo disk which i already have and a 9V Battery!
Features
Not too many, this is a v1 and i might make a v2 if this thing is good enough! For now, this just takes the 35mm piezos input and amplifies it into a headphone jack, sadly i couldnt add more since the deadline is in a day, but i doubt i couldve since this is my 2nd ever real PCB project..
a v2 would defo have recording and wireless transmission features, those seem super cool to have, and screw the 9V battery, wayyy too big
Hardware
Really just a preamp hooked up to a headphone output, features output settings from 0-2Vrms, enough to be real loud on standart 32 Ohm headphones!
Software
- None needed, thank god
- Designed in Fusion360 and KiCad
Schematics
Parts
31| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10uF | Capacitor_SMD:CP_Elec_4x5.4 | C1, C2, C3, C8, C9 |
| 5 | 10uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4, C6, C7, C11, C12 |
| 2 | 1M | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R8 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R3 |
| 2 | 470 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R6 |
| 2 | RK09K1130081 | easyeda2kicad:RES-TH_RK09K1130AAU | R5, R7 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C10 |
| 1 | 22uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5 |
| 1 | 9VBat | Connector_Wire:SolderWire-0.25sqmm_1x02_P4.5mm_D0.65mm_OD2mm_Relief | J1 |
| 1 | ICL7660M/TR | easyeda2kicad:SOP-8_L4.9-W3.9-P1.27-LS6.0-BL | U2 |
| 1 | K7805M-1000R3_C41361052 | easyeda2kicad:PWRM-TH_DEXU_K780XM-1000R3 | U5 |
| 1 | LM321H-TR | easyeda2kicad:SOT-23-5_L2.9-W1.6-P0.95-LS2.8-BL | U6 |
| 1 | PJ-320D | easyeda2kicad:AUDIO-SMD_PJ-320D-1 | CN1 |
| 1 | Piezo | Connector_Wire:SolderWire-0.25sqmm_1x02_P4.5mm_D0.65mm_OD2mm_Relief | MK1 |
| 1 | XC6206P332MR | easyeda2kicad:SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR | U4 |
| 1 | XC62KN3302PR-G | easyeda2kicad:SOT-89-3_L4.5-W2.5-P1.50-LS4.2-BR | U3 |
The 28 most common of 31 parts.
Questions
What parts does the Spymic use?
31 parts, built around the K7805M-1000R3, LM321H-TR, ICL7660M/TR and XC6206P332MR-G. 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 Spymic KiCad files?
From the ILikeMice/spymic repository on GitHub, at the commit this page was made from: the board is PCB/spymic.kicad_pcb and its schematic PCB/spymic.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Spymic design in my own project?
Its repository states no licence, so its author keeps all rights: ask ILikeMice before reusing the design.
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