PWM
- ArduinoArduino - step by step
An automatic light like a fridge light: push button, NPN transistor and LDR, then an Arduino that reads the light on A0 and dims an LED with PWM.
- ArduinoVoltage divider, Arduino and PWM
From measuring the voltage on a potentiometer to an LED that warns when a threshold is crossed
- InfoOscilloscope
What an oscilloscope is and how to use it: the parts of the FNIRSI-1014D, the probe, the trigger, reading the screen and an Arduino PWM signal.
- InfoLED
How an LED works: which way round it goes, why it needs a resistor and how to work it out, each colour's voltage, brightness and PWM, and RGB LEDs.
- InfoServo motor
How an SG90 servo knows its angle: a pulse every 20 ms, three wires, its own power supply, the Arduino Servo library and how long it takes to turn.
