When reed switch is opened, pin 2 of Arduino goes high with the help of the pull-up resistor R2, and the alert signal is available through the piezo-speaker PZ1 (not an active piezo-buzzer). At the ...

As shown in figure, an Arduino UNO has 6PWM channels, so we can get PWM (variable voltage) at any of these six pins. In this chapter we are going to use PIN3 as PWM output. Required Components.

FS2020 - Switch/LED Panel with Arduino A simple external switches and LEDs panel to manage some FS2020 (for PC) airplanes commands. If you are a Flight Simulator enthusiast and would try to build your ...

Code explanation. The complete code for this Arduino reed switch project is given at the end of this article. The code is split into small meaningful chunks and explained below. In this part of the ...

E SWITCH TL1275 Series panel mount tact switches include 500mm long wire leads with connectors. Device is 19mm in diameter and provides a sharp tactile response. The actuator is a snap-in bezel and ...

It is built around Arduino Uno board (board1), seven LEDs (LED1 through LED7), three tactile switches (S1 through S3) and a few discrete components. Fig. 2: Circuit diagram of the window alarm ...

This simple fire alarm circuit uses a smoke sensor, a piezo buzzer for audible alerts, and an LED for visual signaling. When the smoke sensor detects the presence of smoke or gases, it sends a signal ...

Using the if condition, switch the siren between police and ambulance. For ambulance sirens, create a code for emitting an audio signal of frequency between 650Hz to 750 Hz and with a delay of 300.