UART to USB Converter schematic

Making devices computer friendly

Data transfer between electronic devices and a PC (computer) has increased in recent years. Most RS232 serial compliant electronic devices that require connection to a PC are equipped with TTL/CMOS UART interface. Serial data transfer on a PC are increasingly being accomplished using USB technology, in preference to the traditional RS232 serial port which is  almost phasing out. This piece shows how to accomplish serial data transfer between UART devices and a PC via USB port.

Code for Space Vector Modulation Inverter

Briefing

The generation of Space Vector Modulation (SVM) used for Pure Sine Wave Inverters requires software development unlike conventional Pulse Width Modulation. This code was developed in line with the SVM Inverter implementation already discussed on this blog!

Digital Clock Design - the old fashioned way

Time Keeping

Time keeping using Clock has been part of life since time immemorial. Any productive and successful society are good time keepers. 

Newbies in electronics designs are often required to design a digital clock that is not based on microcontroller for educational reasons. This blog post features the old fashioned way of digital clock design in which the background electronics consists of BCD counters and logic gates instead of a microcontroller.

Digital Counter Display Circuit

Why Counters

Digital counters have become increasingly useful in many areas of modern life where number counts over a given range is crucial. They have found widespread applications in the laboratories, production lines, service centres, aerospace, military, computer, education, sports and many other areas of life.

One (1) Second Time Delay for Digital Clock using 555 Timer

Intro

The need for accurate timing of clock signals has become very essential in recent time due to their use in varieties of electronic designs . The successful realization of many digital circuits critically depends on the accurate timing of clock signals, which is the base clock that controls the operation of all other components in that device.

EMI Reduction using Capacitive Filter

EMI (Electromagnetic Interference)Issues

Standard stipulates that an electronic device functions satisfactorily without interfering with other equipment within its environment. High frequency clock signals are one of the major sources of EMI. One of the ways to ensure EMI compliance is by the addition of a simple RC low-pass filter to the output of high frequency clock signals. The filter slows down the rise and fall time of the signal, thereby attenuating the harmonic contents of the signal.

Implementation of Space Vector Modulation (SVM ) Inveter

Prelude
SVM is a sophisticated digital control algorithm employed in modern Inverters for the generation of a three phase pure sine AC voltage. SVM Inverters are mostly used to power high performance industrial drives such as three phase AC induction motors. Unlike the conventional sinusoidal PWM, this form of modulation utilizes more available DC supply voltage (15% more voltage output), produces a sine wave with less Total Harmonic Distortion (THD) and offers more degree of freedom in the implementation [1].