Practice / Hardware & Robotics

Drive an LED from a GPIO

Easy · Whiteboard

Drive a red LED (forward voltage 2.0 V) at 10 mA from a 3.3 V GPIO pin. Draw it, pick the resistor, and say when you would not drive the LED straight from the pin.

Create a free account to answer it and get scored on what a strong answer covers.

InterviewMe: practise job interviews out loudAnswer real interview questions by voice and get a score, what worked, and what to fix for every answer. Built for co-op students, new grads and career switchers in Canada.Behavioural interview practice · Interview questions by role · PricingYou need JavaScript enabled to use the practice tool.