This DIY tool automates LED testing and current limit calculations | Arduino Blog
This DIY tool automates LED testing and current limit calculations | Arduino Blog
blog.arduino.cc This DIY tool automates LED testing and current limit calculations | Arduino Blog
GPIO pins on most microcontrollers operate at low voltages, typically between 3.3V and 5V, and are unable to deliver much current — oftentimes stopping at 20-40mA. This is why, when setting up an LED, series resistors are used to limit the amount of current draw and prevent damage to the pin. M...
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