EE Design Fundamentals

Electronics Product Design

Product Design

When you wish to Begin to learn Electronics, first a short study of Physics is essential, secondly some Electronics theory. Then build simple and small gadgets to learn Practical Electronics while working with Educational Hobby Circuits.  Lastly to make your own product designs, a fundamental knowledge of Analog and Digital Electronics is the foundation for your next steps into Engineering a Design.  

Applications and Components

The basic building blocks for most circuits are Chips or ICs. You can acquire considerable knowledge by studying Application notes of National Semiconductor and Texas Instruments  to start with. When you want to use a Microprocessor or Build Your Own Microcontroller Projects, you can study the documents at Atmel and Microchip to begin. The Specifications and Behavior of Passive Components like inductors, capacitors and Resistors; Discrete Semiconductors; Power Devices. and RF Components have to be understood well, in order to design sturdy Industrial Grade Designs eg. ST.

EE Design Fundamentals
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Electronic Product Design

Electronic Product Design involves Electrical, Mechanical and Material Engineering too. This depends on the product complexity and the involvement of the R&D team in the component engineering too. Some products like RF and Robotics may need custom semiconductors and Some Wearable Electronics may need a custom ASIC as the heart of the device. 

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

delabs design service

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Product Safety and Ergonomics

Ergonomics and Manpower the Engine of Growth

A Worker in One Firm is a Customer for another Firm. Healthy and Safe Workers implies a strengthening Consumer base.Just imagine what wonders it can do for the economy, when you broaden your view, think togetherness, as a Whole; not in isolated competitive groups, not in parts.

 

Ergonomics reduces Worker Stress. Helps in keeping good Mental and Physical Health. Safety is very important. His Limbs, Eyes and Ears are assets that a firm hires. On this page you can start learning these aspects. A good Manager knows that Manpower is the Foremost Asset of any Company.

Product Safety

  • Product should not give even the lightest shock, Even metal parts on user side to be laminated.
  • High energy circuits never enters analog and digital circuit areas without Opto or other Isolation.
  • Gadgets, Furniture, Tools and Storage Units should not cause injury. Rounded Edges, Non Toxic.

Ergonomics and Safety of the Workplace
 

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Power Quality and Clean Energy

"Earth leakage currents arise mainly from the EMC filters built into electronic equipment with switched mode power supplies. Standards limit the leakage current from non-fixed equipment (i.e. equipment that plugs into a standard socket outlet) to less than 3.5 mA. When a lot of electronic equipment is in use, the total leakage current in the protective conductor can become significant."

Earthing Practice by Trevor Charlton

Clean Power

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Design Notes of delabs

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, i am happy to sense that it has helped engineers and enthusiasts worldwide in Electronic Product Design. 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

Amps-n-Volts Design Notes

Some Technical Points

  • Before you open a PC remove power, telephone modem and LAN cables else finger and screwdriver in wrong place can zap chips.
  • The products that survive the infant mortality time of say first six months will last quite long.
  • NTSC is like 320 x 240 pixels, which is TV, which is lower than your computer's 800 x 600.
  • When a microwave oven is turned on, a big spike is caused in the power line due to heavy inrush current on start up, Even pumps and motors cause such short time surges. This causes tripping of electrical protection circuits.
  • When a tree branch falls on the high voltage overhead electrical lines, they spark violently and supply trips.
  • Big or tall trucks go in small roads they may snap all low level cable or telephone wires on their way.
  • Do you need to turn on many equipments-machines all at once? do it one after an other sequentially or use a timer for delays. This is because at peak power demand time, turning on all can cause your fuse to blow or worse.
  • A battery that can be charged is best charged in CC constant current and CV constant voltage modes, that means both current and voltage have to be limited. When a battery is deep discharged many times it will age fast, and an empty battery will take huge currents so limit current. overcharging a battery will killit. After a voltage level is reached it should only trickle charge in mA and a battery has to be cut off on overload or before deep discharge
  • The Lead acid battery breathes a lot, so keep them in a well ventilated open space but rain proof. Use sealed maintenance free battery when possible, these are safer.
  • Teflon tape can be used to make leak proof pneumatic or hydraulic connections if junctions are leaking.
  • The current thru a 3mm or 5mm LED (light emitting diode) should not exceed 20mA, 15mA is quite good.
  • In a circuit swap all PNP and NPN , reverse all diodes and el-caps, reverse the supplies and input polarities, most of the circuit may still work like they did before.
  • A sharp bend in a PCB track is a huge inductance (say 1nH ) when it comes to RF. it may radiate or reflect, it may even act like an antenna and pick up RF from the SMPS, Motor or Cellphones nearby.
  • Persistence of vison around 16 frames a second (60mS) hence very fast events not seen .

Some of these points may be repeated and some not relevant in the present technical engineering scenario. As issues may have been set right, years back.

Amps-n-Volts Archive

Instrumentation Notes

Design Notes

Production Notes

Accelerometers and Gyroscopes

The ADXL345 from Analog Devices is a small, thin, low power, 3-axis accelerometer with high resolution 13-bit measurement at up to ±16 g.

Ben's HobbyCorner - Software - Bascom-examples On the right the ADXL345, connected to the I2c-bus, and when connected well, you will find it in the I2c-scanner. This is the Bascom-AVR code for the I2c-scanner. When the ADXL345 and the HMC5843 are fixed on the board you should see this in Hyperterminal.

Bascom and ADXL345

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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.

Switches in Electronics

A Neon bulb should have a resistor is series to make a Neon Lamp. All specs in designer viewpoint.

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Most of my early life as a R&D Engineer, i have been in Analog. Here are design aspects of circuits using Op-amps and Comparators. Discrete Semiconductor Circuit design like using Transistors and Diodes. RLC parts. The related blog is my delabs Schematics.

Analog Design

Things related to Electronic Design in all its aspects. That includes the prototyping, mechanical, electrical and PCB. Product Safety, EMI-RFI, Reliability and Robustness. The related blog is here Design Gopher

Electronic Design

This Section is related to Microcontrollers and Related Resources. Microcontroller, SOC, FPGA, ASIC. From 80C31 to the Latest ARM chips will be the scope of this section.  The related blog is  here Hyper Embedded

Embedded Systems

Product Design - Industrial Automation and Instrumentation. delabs Technologies uses the brand names delabs and dapj in its Web Services and Resource Sites. These together form an Electronics Informatics and Product Design Technologies Web Consultatory. Updates are Here delabs SmartView

delabs Synergy Car

The design of Power Supplies, DC to DC and AC to DC Convertors, SMPS, High Voltage and High Current equipment. Mosfets, Thyristor, Schottky Diodes, Ferrite Magnetics and Chokes are the various components used. Power Electronics qt delabs.

 Power Electronics

 

Electronic Components and Engineering Materials. The parts, kits, tools that are used in designing and manufacturing electronic products. The Mechanical Nuts-Bolts and Raw Materials used in Electronic Manufacturing. The related blog - Components and Materials.

Electronic Components delabs