![]() ![]() Source code and circuit diagram of each project is free. Click the below buttons to visit the projects. More advanced projects involving Buzzer and a microcontroller. So in analogWrite(*, senValue/4) function in code i am dividing the senValue by 4 to bring the senValue in 8 bit resolution 0-255. Unlike arduino ADC the arduino pwm provides 8 bit resolution.Buzzer and LED will operate only on the voltages greater than 1.5 volts. The if statement in the code is checking 1.5 volts or 310 integer value by ADC. When the voltage across 10 k resistor increases 1.5 volts(ADC value 310) then the buzzer and led are activated and are driven with the same voltage that appears across the 10 k resistor. ![]() The same above strategy is applied in the code.
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