
Neuron
giant-axon/lu.i-neuron-pcb
Lu.i is an electronic neuron circuit mimicking and illustrating the basic dynamics of real, biological neurons. The printed circuit board (PCB) features a configurable, fully analog implementation of the leaky…

Analog leaky-integrate-and-fire neuron PCB designed in KiCad.
Lif neuron schematic is an open-source printed circuit board by YYK2007, from the YYK2007/lif-neuron-pcb repository on GitHub. It is a 2-layer board of 171.5 × 105.5 mm with 49 parts on 65 nets, routed with 772 tracks and 34 vias.
It is built around the MCP6004-E/P, LM339 and BSS84. Its parts include 23 resistors, 7 diodes, 4 capacitors, 3 ICs and 1 transistor. It belongs with the ESP32 boards of this library.
LIF Neuron PCB is an analog leaky-integrate-and-fire neuron board designed in KiCad, then prepared for milling and testing as a physical neuromorphic circuit.
This project turns the leaky-integrate-and-fire neuron model into an actual PCB. Instead of keeping the neuron as code or a simulation, the circuit uses analog behavior such as integration, leak, thresholding, reset, and visible output so the dynamics can be probed on a board.
It became the electronics foundation for later NeuroAR work. The exact analog board did not become the final glasses signal processor, but designing and milling it taught the KiCad, footprint, routing, and production lessons that made the later ADS1292 board possible.
source/ contains the working source files, firmware, CAD, board files, scripts, or app code.artifacts/ contains packaged project assets such as design bundles, board packages, firmware bundles, or distributable files.docs/development/ contains the build notes, tests, screenshots, and design rationale.docs/media/ contains images and videos used by the development notes.source/lif_neuron_schematic-B_Cu.gbrsource/lif_neuron_schematic-Edge_Cuts.gbrsource/lif_neuron_schematic-F_Cu.gbrsource/lif_neuron_schematic.kicad_pcbsource/lif_neuron_schematic.kicad_prosource/lif_neuron_schematic.kicad_schThis project was developed by Youssef Kusibati during Fab Academy 2026 while working across FabLab Benfica and FabLab Kannai. The development notes are included here for context, and the original site reference is available at https://fabacademy.org/2026/labs/kannai/students/youssef-kusibati/.
See LICENSE. Some included datasets or upstream materials may carry their own attribution terms; check nearby license or attribution files when present.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 1k | fab:R_1206 | R_SP1, R10_L1, R11_L1, R12_L1, R13_L1, R14_L1, R15_L1 |
| 7 | 22k | fab:R_1206 | R1, R2, R11_T1, R12_T1, R13_B1, R13_T1, R14_B1 |
| 7 | LED_Small | fab:LED_1206 | D1, D2, D3, D4, D5, D6, D7 |
| 4 | 15k | fab:R_1206 | R10_B1, R11_B1, R14_T1, R15_T1 |
| 3 | 100k | fab:R_1206 | R3, R4, R8 |
| 3 | 100n | fab:C_1206 | C1, C3, C4 |
| 3 | 10k | fab:R_1206 | R5, R10, R11 |
| 3 | 27k | fab:R_1206 | R6, R10_T1, R15_B1 |
| 2 | 47k | fab:R_1206 | R7, R9 |
| 2 | LM339 | fab:SOIC-14_3.9x8.7mm_P1.27mm | U2, U3 |
| 1 | 18k | fab:R_1206 | R12_B1 |
| 1 | 22u | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C2 |
| 1 | BSS84 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Conn_01x04 | fab:PinHeader_01x04_P2.54mm_Vertical_THT_D1mm | J1 |
| 1 | MCP6004 | fab:SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | Module_XIAO-ESP32S3 | PCM_fab:SeeedStudio_XIAO_ESP32S3 | M1 |
| 1 | R_Potentiometer | fab:Potentiometer_TT_Model-23_4.5x5.0x3.0mm | RV1 |
| 1 | SW_SPDT | Button_Switch_THT:SW_E-Switch_EG1271_SPDT | SW1 |

giant-axon/lu.i-neuron-pcb
Lu.i is an electronic neuron circuit mimicking and illustrating the basic dynamics of real, biological neurons. The printed circuit board (PCB) features a configurable, fully analog implementation of the leaky…

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It measures 171.5 × 105.5 mm and has 2 copper layers, 1.6 mm thick.
49 parts, built around the MCP6004-E/P, LM339 and BSS84. 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.
From the YYK2007/lif-neuron-pcb repository on GitHub, at the commit this page was made from: the board is source/lif_neuron_schematic.kicad_pcb and its schematic source/lif_neuron_schematic.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask YYK2007 before reusing the design.