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board/TESTING.md

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You got the WLED chain board manufactured. It is now time to test if the hardware has been assembled correctly.

Test the 6-60V power input for shorts:

  • use a multimeter in resistance mode
  • put the COM lead on the 6-60V screw terminal - terminal
  • put the V lead on the 6-60V screw terminal + terminal
  • the multimeter should read O.L or above 10 MOhn
  • put the COM lead on the 6-60V screw terminal + terminal
  • put the V lead on the 6-60V screw terminal - terminal
  • the multimeter should a fluctuation resistance above 100 kOhm

Test the 5V power port for shorts:

  • use a multimeter in resistance mode
  • put the COM lead on the 5V screw terminal - terminal
  • put the V lead on the 5V screw terminal + terminal
  • the multimeter should read 1.8 kOhm
  • put the COM lead on the 5V screw terminal + terminal
  • put the V lead on the 5V screw terminal - terminal
  • the multimeter should an increasing resistance above 1 kOhm

Test the 3.3V rail for shorts:

  • use a multimeter in resistance mode
  • put the COM lead on the I/O header 3V pin
  • put the V lead on the I/O header 0V pin
  • the multimeter should read 3-4 kOhm
  • put the COM lead on the I/O header 0V pin
  • put the V lead on the I/O header 3V pin
  • the multimeter should above 10 kOhm

Test the 3.3V voltage regulator:

  • connect a power supply set to 5V and limited to 0.2 A on the 5V screw terminal
  • the rightmost green LED should be on
  • the board should draw around 0.1A
  • ensure 3.3V are present on the I/O header 3V/0V pins

Test the USB power input:

  • plug a USB cable connected to a USB port supply on the USB-C port
  • the rightmost green LED should be on
  • the board should draw around 0.1A
  • ensure 3.3V are present on the I/O header 3V/0V pins

Test the 5V voltage regulator:

  • connect a power supply set to 6V and limited to 0.3 A (must be more than 0.2 A) on the 6-60V screw terminal
  • the rightmost green and second rightmost yellow LEDs should be on
  • the board should draw around 0.1A
  • ensure 5.0A are present on the 5V screw terminal

Test resettable 1.8A input fuse:

  • connect a power supply set to 7V and limited to 3A on the 6-60V screw terminal
  • the rightmost green and second rightmost yellow LEDs should be on
  • connect a 1 Ohm resistor across the 5V screw terminal
  • after 10 to 20 seconds, the green light should turn off while the yellow light remains
  • remove the resistor from the 5V screw terminal
  • after a second, the green light should turns back on