delabs Circuits

Showing posts with label Design-Notes-2. Show all posts
Showing posts with label Design-Notes-2. Show all posts

Wednesday, July 23, 2014

Product Development Fundamentals

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

Product Development Fundamentals



C. Criteria of Product Design :
  1. Ergonomics - User friendly Interface of controls, display, etc..
  2. EMI / RFI Ext.- Immunity to external electrical disturbance.
  3. EMI / RFI Int. - Reduction of Internal electrical noise generation.
  4. Input Cost - Selecting Cost effective components and methods.
  5. Product Safety - Eliminating shock hazard, fire hazard or stress.
  6. Corrosion res.- Resistance to Chemical Fumes, brine, gases etc..
  7. Reliability - Long Life reliability engineering, MTBF, stability.
  8. Serviceability - Accessibility - Maintenance and repairs, Self test.
  9. Vibration - Enclosure / Components to be vibration resistant .
  10. Ease of Manufacture.- Manufacture ease and provision for test and Calibration..
  11. PC Interface - RS232, GPIB, etc. for PC Control and recording.
  12. Upgrade Ease - Options, Software change, Hardware upgrades.
  13. Quality - Design, Components, Production methods.
  14. Accuracy - Specifications of performance and its stability.
  15. Misuse-Abuse - Rugged design both electrically and mechanically.
D. Criteria of Circuit Design :
  1. Technologies - Time proven technology and Standard Parts. 
  2. Reliability - Component Selection and Design Methods. 
  3. Modular - Allow for incremental upgrades and Service. 
  4. Safety Margins - Overrating for Voltage, threshold, speed, etc.. 
  5. Testability  - Test Points, Isolating Jumpers, self test mode. 
  6. Isolation - High voltage isolation, User safety, grounding. 
  7. Thermal Limits - Dissipation Limit, Heatsinks, Shutdown, Size. 
  8. Protections - Fuses, Current Limit, Zeners, Varistors, Alarm. 
  9. Power economy - CMOS Designs, LCD Designs, SMPS, Portable. 
  10. Electrical Parts - Connector selection, Relays, Switches, PCB. 
  11. Precision - Accuracy, Resolution, Drift, Thermal stability.
EE Design Library - Electronic Product Design Resource.

Friday, April 11, 2008

Product Design Precautions

When you design a new Product or Engineer an existing one; communications and documentation is important. Creating a satisfying solution is the main thing. If requirements and specs or not properly developed it can lead to blame-games, wasted time and spoils the reputation.

A firm also should do proper market study before the decision to design a product. Even a well designed product cannot be sold if it does not offer a cost-effective solution.

Black Box Specifications

Product Design Precautions
  • Start Projekt {
  • Customer Interaction and Communication to make a specs sheet and drawing.
  • Block Diagram, feasibility, cost, risk, samples demo and study similar ideas.
  • Effective designs are cost effective within customer budget, draft BOM costing.
  • Circuit and Code design and get more inputs from customer and then freeze specs.
  • Build Dummy for ergonomics and discuss, Prototype and start test at site or simulate.
  • Calibration and testing and production documentation drafts final costs.
  • Pilot Production of a small batch, rigorous test batch, and freeze production documents.
  • Documents and Prototypes to be given to Production Engineering.
  • Production Engineering continue engineering maintenance and quality issues.
  • } End Projekt

    GoTo Next Projekt
(I had written this in Aug-05, it is my 90s experience, it may indicate some useful points - delabs)

Contents

Basic Electronics
Basics of Electronics
Product Production
Work Discipline
Testing Points
Learning Electronics
Electronics Theory

Production Notes
Prototype Fabrication
Electrical Circuits
Electromechanical


Library
Scots Guide Electronics
Engineering - Wikibooks
Design Lab - Jim Svoboda
DC Circuits UOG
Socratic Electronics
Blobz Guide Electric Circuits


Product Design
Product Development
Constant Current Source
Good Voltage Regulators
Insulation Resistance
Digital Insulation Tester
DN Schematic PCB 04
DN Product Design 07


Hobby Circuits
VU Meter Circuits
LED brightness control
555 Incredible Chip
Process Control
liquid level measurement
Thermocouples and RTD
Design ADC Interface uC
Thermocouple Amplifier
IA Instrumentation 02
Temperature on DMM
Optical Proximity Switch
Analog Mux - Data Acquisition


Test Measurement
Instrumentation Automation
NI Test and Measurement
DMM Digital Multi Meter
Oscilloscope in T&M
IA Automation 01
Build Instruments
Tektronix T&M Equipment
Educators Corner – Agilent


Power Electronics
UPS Background
Transformer Connections
DN Power Electronics 03
DN Power Electronics 02
Half Bridge Convertor SG3525


Embedded
Interfacing Microcontrollers
Embedded Process Control
80C31 8052 Microcontroller
Microprocessors and uC
Embedded Systems Design

Components
Good Voltage Regulators
Relays and Contactors
Potentiometers Trimpots
Prototype Boards Types
Types of Capacitors
Types of Switches
Resistors How they Work
Coils Transformers SMPS
Mains Transformers Types
DN Components Selection 05

Tutor Gadgets
Count-Up Timer
Digital Logic Gates
Electronics Tutors

History
Teaching Instruments
Charles Proteus Steinmetz
Muntzing a Circuit Design
Teralab Electronics projects
Historical Instruments


Tables, Charts, Videos
Binary and Hex
Resistor Color Code
Ohms Law
Giga, Tera, Pico, Nano
High Resistance Materials

Analog
School - Analog Design
DN Analog Basics 06
DN Op-Amps 01
TI Semiconductors