Blink: an LED and the RGB LED

Checks

Run your code to check it. The checks replay a fixed script on a virtual clock, so the same code always gets the same result.

1. The sketch runs for 3 seconds · Not checked yet
2. It prints blink ready at start-up · Not checked yet
3. GPIO4 blinks · Not checked yet
4. It uses rgbLedWrite(), not the old neopixelWrite() · Not checked yet

Break it

Each fault really happens in the simulation. Trigger one, watch the figure, then read why.

• Reverse polarity on the 5V pinReverse polarityTrigger
• Reverse polarity on the 3V3 pinReverse polarityTrigger
• 5 V on the 3V3 pinWrong voltageTrigger
• 24 V on the 5V pinWrong voltageTrigger
• Brown-outBrown-outTrigger
• 3 V on the 5V pinBrown-outTrigger
• Cold joint on header pin GPIO4Cold solder jointTrigger
• Cold joint on the UART portCold solder jointTrigger
• R17 left offMissing partTrigger
• R24 left offMissing partTrigger
• CP2102N missingMissing partTrigger
• GPIO0 held low at resetBoot strappingTrigger
• 5 V into a 3.3 V GPIOLogic level mismatchTrigger
• 5V shorted to GShort circuitTrigger

Parameters

Change a value here or click a chip in the code.

• Half period
  500 ms
• RGB LED pin

  38 (v1.1)48 (v1.0)