Posts tagged Power Consumption
Arduino Interrupts with PIR Motion Sensor
Arduino Interrupts with PIR Motion Sensor

The basics of Arduino’s hardware interrupt is explored through the use of a passive infrared (PIR) sensor. The passive infrared sensors used here operate at voltages from 2.7V - 5V and use very little energy when operating in the non-tripped state. The PIR sensor is ultimately tripped by an infrared source, typically human body heat (or another animal with similar radiative emission). When the PIR sensor is tripped it sends a HIGH signal to its OUT pin, which will be read by the Arduino’s interrupt pin (pin 2 or 3 on the Uno board). This process seems trivial, but when done correctly can save massive amounts of energy when dealing with battery-powered systems, as in home automation.

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Arduino, ElectronicsJoshua HriskoPIR, passive, passive infrared, PIR sensor, Sensor, IR Sensor, Infrared, LED, Arduino, Arduino IoT, Arduino LED, Arduino PIR, Arduino Sensor, Arduino Interrupt, Interrupt, Arduino IDE, Resistor, Arduino Uno, Arduino Low Power, Low Power, Arduino LowPower, Arduino Wiring, VCC, ATmega, ATmega328, ATmega328P, Power Consumption, Arduino Power Consumption, Arduino Power, RISING, FALLING, CHANGE, attachInterrupt, Arduino attachInterrupt Comments
Arduino Uno R3 vs CH340
Arduino Uno R3 vs CH340

The CH340 Arduino board contains an ATmega328P-U-TH chip, which differs from the classic ATmega328P-PU in official Arduino Uno Rev3 boards. The CH340 is an inexpensive USB-to-Serial chip (datasheet here) that takes the place of the Rev3 board’s more expensive ATmega16U2. This creates issues when programming the Arduino board with certain operating systems (specifically Windows), however, for most Linux and Mac systems - there appears to be no issue. In this tutorial, I will explore the CH340 Arduino board to see whether there are differences in performance and power under different operating conditions. This will definitively answer whether the CH340 is a worthy alternative to the Rev3 or if it’s just a cheap imposter.

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Arduino, Electronics, ProgrammingJoshua HriskoArduino, Arduino CH340, Arduino Uno, Arduino Uno CH340, Rev3 vs CH340, R3 vs CH340, CH340 Arduino, Arduino Board, Arduino Comparison, Multimeter, Arduino Operating System, Arduino Upload, Upload Time, Upload, Arduino Sketch, Arduino Power Consumption, Power Consumption, Arduino Time, Arduino Power, Arduino Linux, Arduino Raspberry Pi, Raspberry Pi ArduinoComment