Here is the circuit of an Arduino-based Panic Alarm! The wiring is very simple so that even a novice can construct this interesting circuit without any difficulty. Arduino is a family of ...

Now it is very easy to build your own siren sound alarm, small enough to be carried in a garment pocket. This powerful audio-visual alert device is realized using the renowned Arduino platform. The 9V ...

Following the circuit around from the pin 13 output we find a resistor, followed by an LED, and then a connection to the Arduino ground. When pin 13 is set to HIGH, +5 volts is supplied through ...

The circuit shown in Figure 1 is very low in cost, but it may not look much like a DAC. It's a one-bit oversampled analog-to-digital converter (ADC) also known as a delta modulator.