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 |
| 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 |
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.
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.
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.
| Type | Link | Description |
|---|---|---|
| AT24CM02 | 2-MBit serial EEPROM dataseheet | |
| AT24CM01 | 1-MBit serial EEPROM datasheet |
R. GAECHTER