Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

The Ultra Cool Stereo PWM Audio

When someone mentions about the Stereo PWM Audio, what’s crossing in your mind? Well, some of you here might be properly think, “Nothing much, as it must be another ordinary Stereo PWM Audio”. Well, believe it or not, this ultra cool Stereo PWM Audio is totally different from the other. Before that, how well are you know about the PWM? For your information, PWM is the short acronym of “Pulse Width Modulation”. It’s a modulation technique, which is being used to generate variable-width pulses to represent the amplitude of an analog input signal. Normally, PWM is widely used in the common “switch-mode” power supplies, as a powerful converter to convert AC power to DC for computers. Furthermore, it can be used to control the speed of a DC motor and the brightness of a bulb. Some people were imagined, if it possible to use the PWM from a simple micro-controller for duplicating complex sounds? Well, it’s possible, especially when it’s a stereo PWM audio! In most of the time, PWM is a very useful method, as it used in audio… Continue reading

Light Controller With PIC16F873

You might have seen numerous types of light controllers in your daily life, but how about building your very own light controller with PIC16F873? There are several reasons why you should use the PIC16F873 as the main circuit for this light controller project: The voltage that controlled by the variable resistor is converted to the digital signal. After it, the signal will be used to control the pulse duration of Pulse Width Modulation (PWM). A/D converting is fully executed every 1-milisecond period using this function. The electric current, where flows through the lamp is controlled by the PWM pulse signal. The pulse of about 610Hz is being used in this circuit! Control voltage input circuit is needed to change the voltage from 0V to 5V by variable resistor. The voltage is inputted to the analog port of PIC. The value of the variable resistor can be decided as you want here. Beside that, the lamp control circuit is going to use for controlled the electric current by switching MOSFET. Furthermore, you will need the clock generator circuit and power supply… Continue reading