Learn electronics, coding, and projects — step by step.
In this tutorial, we will learn to use the 0.96 inch OLED display with monochrome display. This is useful for displaying something for the end user. Its easy to use, we just need 4 wires. 2 wires for the power and another 2 wires for the i2c comunication protocol for controlling the display. CIRCUIT DIAGRAM […]
In previous tutorials we learned to use the hardware timer interrupt which is very useful when we need to execute a task at specific interval period. We also use hardware timer interrupts for executing timed threaded task which is similar to multitasking. Using the hardware timer in that manner, sooner or later, we will runout […]
In this tutorial, we will learn how to use the hardware Timer Interrupts of ESP32 in MicroPython. Timer in essence is basically a counter that either counts up or counts down. Timers can be use to trigger an interrupt event when an overflow happened or a certain count value is reached. CIRCUIT DIAGRAM VIDEO DESCRIPTION […]
In this article, we will be exploring the use of Pulse Width Modulation or PWM in producing a sound using MicroPython. BILL OF MATERIALS ESP32 Development board. A buzzer module or a speaker. Some connecting wires. CIRCUIT DIAGRAM VIDEO DEMONSTRATION CALL TO ACTION If you found this tutorial as helpful, please consider supporting me by […]
CIRCUIT DIAGRAM Links to SG90 datasheet: http://www.ee.ic.ac.uk/pcheung/teaching/DE1_EE/stores/sg90_datasheet.pdf Links to Arduino map() function: https://www.arduino.cc/reference/en/language/functions/math/map/ Some formulas use freq = 1 / Period freq = 1 / 20ms freq = 50Hz 1ms / 20ms = 0.05 = 5% duty cycle 2ms / 20ms = 0.10 = 10% duty cycle To get the equivalent pwm duty values: 0.05 […]