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Monday, August 05, 2019

7800 and 7900 Series Voltage Regulators

The LM78XX series of three-terminal positive regulators is available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut-down, and safe operating area protection.

7805 is popular for Embedded Systems and 7905 is sometimes used for the Dual Supply needs in such Microcontroller cards with Mixed Design sub-sections like A/D or Opamps.

7812 and 7912 are very popular in powering Traditional Opamp or communications circuits with a stable and reliable Dual Supply.

Power Supplies Section - Here you will find examples of 7824 and 7924 Power supplies.

Fairchild LM7812

In Instrumentation and Industrial Circuits where Size is not a problem and the current or power usage is less. A Mains transformer, bridge regulators, capacitors and these regulators are a time tested low noise and robust system.

SMPS does have EMI-RFI problems, hence use when small sizes are needed and high currents are required. In battery powered devices switching supplies are inevitable as they are power efficient.

Saturday, August 03, 2019

Electrical Safety and Clean Power

This is an educative and important guide for Electrical Equipment Safety. This can be also applied partially to Power Electronics and Home Energy Systems. Electronic Equipment also have to be maintained by Calibrating them and protecting them from environmental parameters like dust, grime, direct sunlight, moisture, humidity, sea wind (brine), corrosive fumes and chemicals. They should not be even placed near machines like a big lathe, sub-sonic or low frequency vibrations.

Electrical Safety Testing Reference Guide

Electrical Safety is a Serious Issue Electrical Safety in the workplace is the most important job of an electrical worker. No matter how much training one has received or how much employers try to safeguard their workers, Electrical Safety is ultimately the responsibility of the electrical worker.

Electrical Safety and Clean Power

Electrical Safety Hazards Handbook

Power Studies, Arc-Flash Hazard Labeling, Data Gathering and Inspection, Engineering Services.

The steps to osha electrical safety

Electrical Design, Lighting and most important Earthing or Grounding. Good Reference Articles and Product Reviews.

Friday, August 02, 2019

Types of Switches in Electronics

Switches are electromechanical devices. The are used to control the  path of current or energy flow. Power switches are used to turn on and off loads. The contacts should be robust and have immunity to  sparking and corrosion. Switches for signals need to be gold plated for low contact resistance and within a sealed enclosure.

Types of Switches in Electronics

Illuminated Rocker and Plain Rocker DPDT switches are popular in Power Boards and Extension Boxes for Mains power switching. Both Phase and Neutral lines are switched ON or OFF. This is not only safe but also reduces sparking.

Friday, July 19, 2019

MunEDA - Enhance Design Performance

They provide solutions in EDA that simplify the circuit design process and enhance the Performance/Yield. They provide the technology for analysis and optimization of yield and performance of analog, mixed-signal and digital designs.

MunEDA - Enhance Design Performance

MunEDA WiCkeD tools are seamlessly integrated into the main industrial standard simulation environments and design frameworks but also support customer specific inhouse simulators and designflows.

BAS - Basic & Sensitivity Analysis

BAS - Basic and Sensitivity Analysis

"WiCkeD Basic delivers a powerful basic feature compilation to enable the circuit designer to do enhanced topology analysis, constraint setup and management as well as different analysis types for circuit performance, parameter sensitivity and correlation."

MunEDA GmbH
Stefan-George-Ring 29 81929 Munich, Germany

Wednesday, July 17, 2019

Rugged Circuits - Design Service

Design and Manufacturing Service for Industrial Embedded Systems for Robust Requirements. Services include component selection, PCB design, prototyping, manufacturing, and distribution.

Rugged Circuits - Design Service

Rugged Circuits - Design Service

Custom control system for an industrial machine

Triple RS485 outputs, graphic LCD display interface with dimmable backlight, 4x4 keypad interface, real-time clock, 8 discrete and protected I/O's, and in-the-field firmware upgrades over USB.

They also have a estore with products related to Ruggeduino (Rugged+Arduino ), including components, kits, Shields. The products like Rugged Motor Driver and Yellowjacket a WiFi microcontroller module, need special mention.

Rugged Circuits LLC
Wayland, Michigan 49348

Monday, July 15, 2019

Electronic Design Automation - EDA

The Electronic System Design Alliance (ESD Alliance), an international association of companies providing goods and services throughout the semiconductor design ecosystem, is a forum to address technical, marketing, economic and legislative issues affecting the entire industry.

Electronic System Design Alliance

Older Site  - "The Electronic Design Automation Consortium is the international association of companies developing EDA tools and services that enable engineers to create the world's electronic products....."

Electronic Design Automation - EDA

"The EDA industry services virtually every major semiconductor and electronics systems company in the world including, computer, communications, consumer electronics, medical and aerospace. The demand for increasingly complex ICs and SOCs is exploding. Our EDA technologies make it possible for the world's electronic companies to keep up with demand for smaller, faster, more powerful and lower cost electronic products....

Design Automation Conference (DAC)

"The Design Automation Conference (DAC) is recognized as the premier event for the design of electronic circuits and systems, electronic design automation (EDA) and embedded systems and software (ESS). "

DAC 2013 Austin: Celebrating 50 years of Innovation

"7,000 attendees come from all over the world to learn about products and solutions that bring additional value to the industry. This audience represents decision-makers at all levels of the buying process from the leading semiconductor, computer, telecommunication and consumer electronics companies."

Friday, June 07, 2019

Analog Op-Amp Circuits

he very first designs that came about were analog designs, a Vacuum Tube amplifier is an example. Analog is the representation of data or physical parameter in an accurate and precise decimal number like +72.182 mV. The greater the resolution required, the more demanding is the design for achieving high accuracy and low drift.

As an analogy, see the conventional water tap as an analog control, an electric light ON-OFF switch as a digital control. After the handheld Abacus calculator (low-power, durable, bio-degradable), Mechanical and electro-mechanical computers were made and studied, The very first electronic computers were Analog Computers using an opamp as a building block.

Operational Amplifiers

With a few Op-Amps and a regulated Power supply, many Instrumentation and Process control equipment can be designed. The Human Brain understands Numbers, Quantity and it regulation very well ! On the right you can see a analog controller based on opamps and discrete devices. A Heater, Fan and Motor is regulated, controlled and timed for a process.


Analog Controller based on Opamps
Analog is about numbers, the circuits can be understood and designed mathematically or empirically. Designing and Building a True RMS Rectifier with Op-Amps, will help a designer digest many Op-Amp capabilities.

Analog Op-Amp Circuits

Monday, June 03, 2019

Product Development Fundamentals

Electronic Product Design and development capability can be refined and enhanced only by practical experience. A student can learn these aspects by working in a Engineering Service Company.

Building Custom design Solutions for clients will build skills of component selection, black box specs, customer communication and prototype testing among many others.

A. Product Design Sections :
  1. Electronic Engineering - Circuit Design, PCB Design, EDA. 
  2. Mechanical Engineering - CAD, Tool and Die Design, Enclosure 
  3. Software Engineering Firmware - PC ware, CASE, emulators 
B. Methods of Product Design :
  1. Design Automation. - Design and Simulation with Computer. 
  2. Computer Aided Design - Design on Computer, Breadboard test. 
  3. Conventional Design. - Paper design with Breadboard test 
Product Development Fundamentals

Circuit Design Service of delabs  - Product and Circuit design. Consulting tech service.

Saturday, June 01, 2019

Amps-n-Volts eMag

Near 2001 i started sharing my learning and experience in Electronics Engineering on Blogs and Newsletters. One of the Successful eMag and electronic email magazine ran for five years. I lost interest later in the email mag, and this magazine just morphed into a dozen or more Tech Blogs that run today.

From the feedback i got, it has helped engineers and enthusiasts worldwide in Electronic Product Design.

Amps-n-Volts Notes Corrected Improved

These blogs contain most of the Magazine - Schematics of delabs - Soldermans Basics - Circuits Faq

My knowledge is limited to my experience, observation, perception, learning and beliefs, but i have to express my views freely. These posts are mirrored in design devices.

Friday, May 10, 2019

RF Cafe - Microwave & Wireless Engineering

Resources for Radio, Radar, RF, Microwave, & Wireless Engineering. Collection of links to various application notes for different RF Vendors. Links to RF equations, technical data sheets, math notes and much more.

RF Cafe - Microwave & Wireless Engineering

Some important areas
  • RF Engineering Calculators
  • Electrical / Electronics Conversions, Formulas & References
  • Design Data Resources
E-flite Mini Pulse XT - Brushless ESC Waveform - RFCafe

E-flite Mini Pulse XT - Brushless ESC Waveform

This waveform shows the square waves that drives one of the three phases at a relatively low throttle setting (coming from the brushless speed controller). The peak amplitude is constant for all speeds.

"Much more than just a self-serving video of my new R/C airplane flight agility, this model represents a plethora of modern electronics. Although the radio control system in this plane is a standard narrow band FM variety on 72.170 MHz (as opposed to my 2.4 GHz, spread spectrum system), the motor is a state-of-the-art 3-phase brushless model (E-flite 450)with a sensorless electronic speed control (E-flite EFLA331, 20 A)."

FreePCB - PCB editor

FreePCB is a free, open-source PCB editor, released under the GNU General Public License. It was designed to be easy to learn and easy to use, yet capable of professional-quality work.

FreePCB - PCB editor

Some of its features are:
  • 1 to 8 copper layers
  • Board size up to 60 inches by 60 inches
  • Uses English or metric units (i.e. mils or mm) for most functions.
  • Footprint libraries courtesy of Ivex Design International Inc.
  • Footprint Wizard and Footprint Editor for creating or modifying footprints
  • Imports and exports PADS-PCB netlists
  • Exports extended Gerber files (RS274X) and Excellon drill files
Example - Logic Analyzer: This is an open-source logic analyzer called MiniLA contributed by Bob Grieb of the User Forum. The image on right is the Logic Analyzer PCB.

FreePCB - PCB editor

Some Features:
  • Up to 32 channels
  • 128 Kb of memory for each channel
  • Sampling rate up to 100 MHz (timebase in 1-2-5 sequence)
  • Input levels compatible with 3.3V and 5V logic
  • Selectable pretrigger/posttrigger buffer size in 8K step

Tuesday, May 07, 2019

4-20mA Conditioning - XTR101 TI BB

These are Burr Brown Devices from TI. The BB Chips are excellent devices and High Precision, but a bit more expensive. These can be used when customer demands a Higher Quality and Precision. These are good for High Reliability Industrial Instrumentation. - delabs

4-20mA Conditioning - XTR101 TI BB

The XTR101 is a microcircuit, 4-20mA, two-wire transmitter containing a high accuracy instrumentation amplifier (IA), a voltage-controlled output current source, and dual-matched precision current reference.

4-20mA Conditioning - XTR101 TI BB

The two-wire transmitter allows signal and power to be supplied on a single wire pair by modulating the power-supply current with the input signal source. The transmitter is immune to voltage drops from long runs and noise from motors, relays, actuators, switches, transformers, and industrial equipment.

Monday, April 22, 2019

Wide-Bandwidth Dual JFET Opamp LF353

These devices are low cost, high speed, dual JFET input operational amplifiers with an internally trimmed input offset voltage.

They require low supply current yet maintain a large gain bandwidth product and fast slew rate. In addition, well matched high voltage JFET input devices provide very low input bias and offset currents.

Wide-Bandwidth Dual JFET Opamp LF353

LF353 - Wide Bandwidth Dual JFET Input Operational Amplifier

Some Highlights
  • Gain Bandwidth 4 MHz
  • Slew Rate 13 Volts/usec
  • Offset Voltage 10 mV
  • Low Input Bias Current: 50pA
  • High Input Impedance: 1 Tera Ohms

Wednesday, April 03, 2019

ASQ - Resources for the Quality Professional

ASQ was born in the days when "quality control" usually meant ensuring that manufactured products were free of defects....ASQ organizational membership provides the invaluable resources you need to concentrate on product, service and experiential quality and continuous improvement for powerful top-line and bottom-line results.

ASQ - Resources for the Quality Professional

ASQ’s Emerging Quality Leaders Program is specifically designed to develop the leadership skills of quality professionals. The International Team Excellence Award program is designed to award achievements in improved performance in businesses of all sizes.

ASQ - Resources for the Quality Professional

The last decade has brought many changes to Iredell-Statesville Schools (I-SS) in North Carolina. In 2002, the district embarked on its journey to continuous improvement by using the Baldrige Criteria for Performance Excellence.

Tuesday, April 02, 2019

DC to AC Pure Sine Wave Inverter

Here are project reports on how to manage the various design needs of a inverter for a power ups. Even Solar Energy systems need inverters to create AC Sine Wave Power Supply from a DC Battery Array.

DC to AC Pure Sine Wave Inverter

Creating a Efficient and Inexpensive Inverter - By Jim Doucet, Dan Eggleston, Jeremy Shaw

This report focuses on DC to AC power inverters, which aim to efficiently transform a DC power source to a high voltage AC source, similar to power that would be available at an electrical wall outlet. Inverters are used for many applications, as in situations where low voltage DC sources such as batteries, solar panels or fuel cells must be converted so that devices can run off of AC power.

PWM Techniques: A Pure Sine Wave Inverter - Authors :Ian F. Crowley and Ho Fong Leung

This report documents the development of one component of an uninterruptible power supply, the DC-to-AC inverter. Through the use of analog signal processing techniques, a prototype which efficiently and accurately emulates the pure-sine wave power present on the power grid was created. The three-level PWM system within this report is created with the possibility of a feedback-regulated system to be implemented in the future.

MQP Terms A­B­C 2006 ­2007, Advisor: Professor Stephen J. Bitar

Wednesday, February 20, 2019

Benchtop DC Power Supply

After the DMM and Logic Probe we have DC Power supply as an Essential Workbench Instrument for the Electronics Aspirant. Hobby or Engineering; we need tools to get the job done.

Now you can drool on a vintage power supply with an Analog Dial Meter and Rotary Knobs with Push-Button Selector Switches.

Benchtop DC Power Supply

Small Variable power Supply

Features: 1.3-12.2 V, 1 A, over-current protection. This is a simple but reliable device based one of the oldest integrated voltage regulators of them all - the LM723.

Power Supply Adjustable 0V-30V DC/2A

It is a simple circuit regulated power supply, based on the known LM 723, that drive a transistor Q1 [2N3055]. The regulation of voltage, of expense becomes with potentiometer R1 from 0v-30v DC roughly. In order to we achieve 30 V,...

Build A 10 Amp 13.8 Volt Power Supply By N1HFX

Sometimes amateurs like to home-brew their power supplies instead of purchasing one off the shelf at any of the major ham radio retail dealers. The advantage to rolling your own power supply is that it teaches us how they work and makes it easier to troubleshoot and repair other power supply units in the shack.

delabs Notes

Always remember Amateur Radio Operator or Ham is an highly skillful, professional and prudent design engineer. A qualification is not to be valued in Engineering, it is the Practical Problem Solving abilities that some people posses. 

Tuesday, February 19, 2019

Sine wave Inverter 800VA

 Here are two Sine wave Inverter circuit applications that can be made into an UPS or Uninterrupted Power Supply. These are used in Home, Office and Shops. It provides emergency power when Mains power goes down or browns out.

Sine wave Inverter 800VA

These also help supply power while switching from Mains Power to In-house Diesel Generation  Power Stations or Integrate with Solar Powered Systems to provide 110 Volts or 220 Volts AC.

800VA Pure Sine Wave Inverter - High Performance Isolated Power

This application note describes the design principles and the circuit operation of the 800VA pure Sine Wave Inverter.

800VA Pure Sine Wave Inverter's Reference Design, slaa602 - TI.com

The pure Sine Wave inverter has various applications because of its key advantages such as operation with very low harmonic distortion and clean power like utility-supplied electricity, reduction in audible and electrical noise in Fans, fluorescent lights and so on, faster, quieter and cooler running of Inductive loads like microwaves and motors.

Power inverter is a device that converts electrical power from DC form to AC form using electronic circuits. It is typical application is to convert battery voltage into conventional household AC voltage allowing you to use electronic devices when an AC power is not available. There are basically three kinds of Inverter out of which, the first set of inverters made, which are now obsolete, produced a Square Wave signal at the output.

Texas Instruments, Application Report SLAA602 , June 2013

Wednesday, February 13, 2019

Micron - Semiconductor Solutions - Memory

Micron's DRAM and Flash components are used in today's most advanced computing, networking, and communications products..

Micron - Semiconductor Solutions - Memory

Product Line Include - DRAM Modules, NAND Flash, Managed NAND, RealSSD and Phase Change Memory among many others.

AC-520 Micron

The AC-520 advances our unique modular architecture with our high-bandwidth Hybrid Memory Cube (HMC) and an Intel® Arria® 10 FPGA.

Up to three AC-520 modules can be snapped onto a Micron full-length PCIe backplane (up to eight backplanes in a 4U chassis), filling a single PCIe slot with a groundbreaking level of parallel processing density for compute-intensive and memory-bound applications.

Micron Technology, Inc.
8000 S. Federal Way, P.O. Box 6. Boise, ID 83707-0006 USA

Tuesday, January 22, 2019

Dunfield Development Services

They provide system design and software/firmware development services. They secialize in the design and implementation of highly reliable and efficient real-time systems.

Dunfield Development Services

Dunfield Development Services

Some Areas
  • Special purpose and proprietary operating systems
  • Communications and networking protocols
  • Low-level interfaces, device drivers
  • Linux based systems
  • Test systems (manufacturing)
  • Real-time control systems
Contact Person - Dave Dunfield - Systems engineer with over 30 years of experience in the industry.

Gamma Radation Detector
 
This is a security device used to detect the presense of various types of radiation.

Monday, January 21, 2019

CircuitLab - Online Schematic Editor and Simulator

Draw and print beautiful schematics for lab reports. In-browser simulations make it easy to quickly learn electronics concepts. No need to Install, it is a Online Web Application !

CircuitLab - Online Schematic Editor & Simulator

Test and Simulate circuit ideas before breadboarding. SPICE-like models with a mixed-mode simulation engine help you apply one tool to a wide range of design tasks, from digital to analog, DC to VHF and beyond.

CircuitLab - Online Schematic Editor and Simulator

BJT Cascoded Active-load Differential Amplifier with CMFB

Build non-op-amp Common-Mode Feedback (CMFB) - This kind of high-gain differential input stage might be useful as part of an op-amp, but it's a bit silly to include an op-amp within a stage another op-amp......

Some Examples
  • 555 Timer as Oscillator / PWM Generator
  • 7805 & Wall-wart Experiencing Voltage Drop-out
  • Digital 4-bit counter and DAC
  • Diode full-wave (bridge) rectifier
  • Laplace transform step response and Bode plot
  • LED with resistor biasing
  • MOSFET switching inductive load
  • Op-Amp inverting / non-inverting amplifier
  • RLC resonance
  • Zener diode voltage reference

Friday, January 18, 2019

Multi-Tech Embedded Communications Solutions

A leading developer and manufacturer of M2M or machine-to-machine communications products. Device Networking Systems and Modules.

Multi-Tech Embedded Communications Solutions

Manufacturer of award-winning Unified Communications and device networking products.

A versatile suite of hardware and software products to make your Internet of Things IoT system development easy and powerful.

MultiConnect Dragonfly for M2M and IoT

MultiConnect Dragonfly cellular SoM

These are complete, ready-to-integrate processing and communications devices that offer developers the functionality of a SoM with the convenience of an onboard cellular radio all in one compact design.

Dragonfly also comes with an ARM mbed compatible software library for even faster development as well as future support for MultiTech’s hosted application store and device management systems.

Multi-Tech Systems, Inc.
2205 Woodale Drive Mounds View, MN 55112 United States.