Avr version not showing in visual micro generator#

Avr version not showing in visual micro generator#

When TCNT equal to OCR value the wave generator circuit will set (ON) or reset (OFF) the corresponding microcontroller PWM I/O ports. The PWM peripheral will use the TIMER counter register ( TCNT) as a digital step-up /down and continuously compare to the pre-determine duty cycle register ( OCR вЂ“ output compare register) value. Most of the microcontroller PWM peripheral depends on the TIMER peripheral to provide the PWM signals frequency. On this tutorial we are going to use Atmel AVR ATMega168 microcontroller which support up to 6 PWM output simultaneously and at the end of this tutorial we will take advantage of all the available PWM peripheral to make a nice RGB LED Light and Sound Show.

Today most of modern microcontroller has a build in PWM peripheral inside this make generating PWM signal is become easy and straightforward, you could read more about non microcontroller PWM base generator on вЂњ The LM324 Quad Op-Amp Line Follower Robot with Pulse Width ModulationвЂќ article on this blog. Now you understand that by just adjusting the PWM duty cycle we could easily control the LED brightness or the electrical motor spinning speed. The PWM signal normally has a fixed frequency (period) with a duty cycle that could vary from 0% to 100%. This average in power could be presented as average in voltage as follow: The 100% PWM duty cycle means itвЂ™s fully ON and we could say that 100% of the power or energy is delivered to the electrical device, while 15% duty cycle means only 15% of the power is being delivered to the electrical device. Duty cycle is expressed in percentage therefore you could define the duty cycle of PWM signal as follow: The duty cycle will be higher when the ON time is longer than the OFF time and vice versa. The above picture show a typical Pulse Width Modulation (PWM), the PWM duty cycle is the proportion of the signal вЂњONвЂќ time to one period (T) of the signal time. The Light Emitting Diode (LED) will respond to this pulse by dimming or brighten its light while the electrical motor will respond to this pulse by turning its rotor slow or fast. longer or shorter, we could easily control the amount of energy received by the electrical device. The average amount of energy received by the electrical device is corresponding to the ON and OFF period (duty cycle) therefore by varying the ON period i.e. This method simply switches ON and OFF the power supplied to the electrical device rapidly. Pulse Width Modulation (PWM) is a technique widely used in modern switching circuit to control the amount of power given to the electrical device. Working with Atmel AVR Microcontroller Basic Pulse Width Modulation (PWM) Peripheral Apby rwb, under Microcontroller.