2 layers76.2 × 50.8 mm
2 layers36 × 15 mm
Tem
0x007E/temTWI/EEPROM Module
- Size
- 36 × 15 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 12
- Pads
- 52
- Tracks, vias
- 50, 27
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Dec 2025
- Updated
- 22 Apr 2026
Overview
Tem is an open-source printed circuit board by 0x007E, from the 0x007E/tem repository on GitHub. It is a 2-layer board of 36 × 15 mm with 23 parts on 12 nets, routed with 50 tracks and 27 vias.
It is built around the AT24CM02-SSHM-T. Its parts include 7 resistors, 3 capacitors, 2 ICs, 1 connector and 1 switch.
Main components
1README
README.md
TEM - TWI EEPROM Module
The TEM is a board with an AT24CM0X EEPROM or any other EEPROM that fits the pin setting of the board. The board itself is driven with a voltage from 3V3-5V. The EEPROM can be protected from being written with the onboard switch SW1.
The address setup of the
EEPROMscan be setup with JumperJP1/JP2for the firstEEPROMand JumperJP3/JP4for the secondEEPROM.
| Experience | Level |
|---|---|
| Soldering | |
| Mechanical |
Downloads
| Type | File | Description |
|---|---|---|
| Schematic | pdf / cadlab | Schematic files |
| Board | pdf / cadlab | Board file |
| Drill | Drill file | |
| PCB | zip / tar | KiCAD/Gerber/BoM/Drill files |
| Mechanical | zip / tar | FreeCAD/Housing and PCB (STEP) files |
Hardware
The pcb is created with KiCAD, the housing with FreeCAD. All files are built with github actions so that they are ready for a production environment.
PCB
The circuit board is populated on both sides (Top, Bottom). The best way for soldering the SMD components is within a vapor phase soldering system and for the THT components with a standard soldering system.
Top Layer
Bottom Layer
Mechanical
The housing has a tolerance of 0.2mm on each side of the case. So the pcb should fit perfectly in the housing. The tolerance can be modified with FreeCAD in the Parameter Spreadsheet.
Assembled
Exploded
Additional Information
| Type | Link | Description |
|---|---|---|
| AT24CM02 | 2-MBit serial EEPROM dataseheet | |
| AT24CM01 | 1-MBit serial EEPROM datasheet |
R. GAECHTER
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10k | Resistor_SMD:R_1206_3216Metric | R1, R2, R3, R6, R7 |
| 4 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3, JP4 |
| 2 | 100n | Capacitor_SMD:C_1206_3216Metric | C2, C3 |
| 2 | 3k3 | Resistor_SMD:R_1206_3216Metric | R4, R5 |
| 2 | AT24CM02-SSHM | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1, U2 |
| 1 | 10u | Capacitor_Tantalum_SMD:CP_EIA-6032-28_Kemet-C | C1 |
| 1 | BIN | Symbol:WEEE-Logo_4.2x6mm_SilkScreen | FID3 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Horizontal | J1 |
| 1 | ESD | Symbol:ESD-Logo_6.6x6mm_SilkScreen | FID1 |
| 1 | MountingHole_Pad | MountingHole:MountingHole_2.7mm_M2.5_DIN965_Pad | H1 |
| 1 | OH | Symbol:OSHW-Logo_5.7x6mm_SilkScreen | FID2 |
| 1 | QR | Images:QR_0x007e_very_small | FID4 |
| 1 | SW_Wuerth_450301014042 | Button_Switch_THT:SW_Slide-03_Wuerth-WS-SLTV_10x2.5x6.4_P2.54mm | SW1 |
Questions
How big is the Tem PCB?
It measures 36 × 15 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Tem use?
23 parts, built around the AT24CM02-SSHM-T. 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 Tem KiCad files?
From the 0x007E/tem repository on GitHub, at the commit this page was made from: the board is pcb/TEM.kicad_pcb and its schematic pcb/TEM.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Tem design in my own project?
Its repository states no licence, so its author keeps all rights: ask 0x007E before reusing the design.
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