Power supply unit

Requirements of the PSU

• the unit must be positioned into a box
• the unit can be positioned in any way even upside down
• one socket to power the PSU
• one socket with 5V and 12V output power lines
• it must be possible to add more output sockets in future
• one switch to turn on or off the PSU
• each output socket has a 2 LEDs showing if the 2 output lines works (a yellow LED for 12V and green one for 5V)
• the USB expansion card is positioned into the PSU
  • the box has an USB socket to connect to the PC
  • one red LED shows if the USB card is powered
  • one DSUB 25pin socket to connect the master to the USB expansion card
  • it must be possible to add more DSUB sockets in future
• the box must have a cooling fan