6 layers134 × 84.2 mm
2 layers54.5 × 81.5 mm
programs for expeyes and expeyes-junior
- Size
- 54.5 × 81.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 105
- Nets
- 65
- Pads
- 291
- Tracks, vias
- 799, 139
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 17 Aug 2012
- Updated
- 22 May 2026
Overview
Ejun is an open-source printed circuit board by expeyes, from the expeyes/expeyes-programs repository on GitHub. It is a 2-layer board of 54.5 × 81.5 mm with 105 parts on 65 nets, routed with 799 tracks and 139 vias.
It is built around the PIC24FV32KA302-E/SS, LM324 and MCP2200-I/SS, with the TL084 and LM1117-5V among its other parts. Its parts include 28 capacitors, 27 resistors, 23 connectors, 9 ICs and 5 diodes. It belongs with the PIC boards of this library.
Main components
5
PIC24FV32KA302-E/SS
SSOP-28-208mil-40℃~+125℃ 12bit 16 Bit 23 2KB 2V~5.5V 32KB 32MHz 512Byte Built-in FLASH PIC SSOP-28-208mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
LM324
SOP-14-1.5V~10V 0℃~+70℃ 24V 250nA 3V~20V 4 40mA 50nA 700uA 7mV 80dB SOP-14 Operational Amplifier ROHSHXY MOSFETOperational Amplifier
MCP2200-I/SS
SSOP-20-208mil-40℃~+85℃ 13mA 1mbps 3V~5.5V 9uA USB 2.0 USB to UART SSOP-20-208mil USB Converters ROHSMicrochip TechnologyUSB ConvertersTL084
SOP-14-18V~18V 0℃~+70℃ 1.4mA 16V/us 20nA 3mV 4MHz 4nA 60mA 75dB Four channels Short-Circuit Protection、Built-in compensation SOP-14 FET Input Amplifiers ROHSGcoreOperational Amplifier
LM1117-5V
SOT-89-3-40℃~+125℃@(Tj) 0.005%Vout 1 1.3V@(1A) 18V 1A 5V 5mA 60dB@(120Hz) Fixed Over Current Protection、Over Temperature Protection Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSUMWUncategorised
README
README.mdexpeyes-programs
programs for expeyes and expeyes-junior
how to build all the programs:
some files are easily generated from sources and are not distributed in this repository.
In order to build all necessary files (including translations, and others),
one can run make from the topmost directory.
Parts
105| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | .1u | MyLib:C_0805-0.1uf | C1, C3, C5, C9, C10, C11, C14, C15, C19, C20, C21, C22, C23, C25, C26 |
| 9 | 10K | MyLib:C_0805 | R1, R3, R8, R9, R15, R18, R21, R24, R25 |
| 6 | 1K | MyLib:C_0805 | R11, R13, R16, R19, R22, R27 |
| 4 | 100u | MyLib:TantalC_SizeC_EIA-6032_Reflow | C2, C6, C7, C8 |
| 4 | 10u | MyLib:myTantalC_SizeA | C4, C16, C27, C28 |
| 4 | 15pF | MyLib:C_0805 | C12, C13, C17, C18 |
| 4 | GND | MyLib:3mm-mounting-hole | m1, m2, m3, m4 |
| 4 | GND | MyLib:myPhoenixCon-new | P14, P15, P16, P17 |
| 2 | 10M | MyLib:C_0805 | R10, R17 |
| 2 | 3906 | MyLib:SOT-23-BEC | Q1, Q2 |
| 2 | 47 | SMDCAP:C_1206 | R4, R5 |
| 2 | 4v7 | MyLib:zener | D1, D2 |
| 2 | 51K | MyLib:C_0805 | R23, R26 |
| 2 | 5K1 | MyLib:C_0805 | R2, R12 |
| 2 | 7v1 | MyLib:zener | D3, D5 |
| 2 | fid | MyLib:fiducial | f1, f2 |
| 1 | 100 | MyLib:C_0805 | R20 |
| 1 | 10V | MyLib:myTestPoint | TP2 |
| 1 | 10k | MyLib:C_0805 | R7 |
| 1 | 12K | MyLib:C_0805 | R6 |
| 1 | 12MHz | MyLib:Crystal_HC49-U_Vertical | X1 |
| 1 | 15pF | MyLib:C_0805-0.1uf | C24 |
| 1 | 16MHz | MyLib:Crystal_HC49-U_Vertical | X2 |
| 1 | 3K3 | MyLib:C_0805 | R14 |
| 1 | 5V | MyLib:myTestPoint | TP1 |
| 1 | 74126 | MyLib:SOIC-14_3.9x8.7mm_Pitch1.27mm | U9 |
| 1 | 7660 | MyLib:SOIC-8_3.9x4.9mm_Pitch1.27mm | U3 |
| 1 | A1 | MyLib:myPhoenixCon-new | P2 |
| 1 | A2 | MyLib:myPhoenixCon-new | P7 |
| 1 | Ain | MyLib:myPhoenixCon-new | P18 |
| 1 | Aout | MyLib:myPhoenixCon-new | P13 |
| 1 | CCS | MyLib:myPhoenixCon-new | P3 |
| 1 | CONN_5 | MyLib:PICKIT-PROG | J2 |
| 1 | DAC | MyLib:SOT-23-6 | U8 |
| 1 | I2C | MyLib:myPin_Header_Straight_1x04 | J5 |
| 1 | IN1 | MyLib:myPhoenixCon-new | P4 |
| 1 | IN2 | MyLib:myPhoenixCon-new | P5 |
| 1 | LED | MyLib:myPin_Header_Straight_1x02 | D4 |
| 1 | LM1117-5V | MyLib:SOT-223 | U2 |
| 1 | LM324 | MyLib:SOIC-14_3.9x8.7mm_Pitch1.27mm | U6 |
| 1 | MCP2200 | MyLib:SOIC-20-W | U5 |
| 1 | MicOut | MyLib:myPhoenixCon-new | P8 |
| 1 | OD1 | MyLib:myPhoenixCon-new | P11 |
| 1 | PIC24FV32KA302 | MyLib:SOIC-28-W | U7 |
| 1 | PVS | MyLib:myPhoenixCon-new | P10 |
| 1 | PVS | MyLib:myTestPoint | TP3 |
| 1 | SEN | MyLib:myPhoenixCon-new | P6 |
| 1 | SINE | MyLib:myPhoenixCon-new | P1 |
| 1 | SQR1 | MyLib:myPhoenixCon-new | P9 |
| 1 | SQR2 | MyLib:myPhoenixCon-new | P12 |
| 1 | TC1240A | MyLib:SOT-23-6 | U1 |
| 1 | TL084 | MyLib:SOIC-14_3.9x8.7mm_Pitch1.27mm | U4 |
| 1 | USB | MyLib:USB_A-new | J1 |
| 1 | mic | MyLib:myPin_Header_Straight_1x02 | J3 |
| 1 | pwr | MyLib:mySocket_3x1 | J4 |
Questions
How big is the Ejun PCB?
It measures 54.5 × 81.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ejun use?
105 parts, built around the PIC24FV32KA302-E/SS, LM324, MCP2200-I/SS and TL084. 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 Ejun KiCad files?
From the expeyes/expeyes-programs repository on GitHub, at the commit this page was made from: the board is EJun/ejun.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ejun design in my own project?
Its repository states no licence, so its author keeps all rights: ask expeyes before reusing the design.
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