Design

Product design, circuit design, eda tools.

Bill O’Donnell – Tech Gizmo Builder

 Design, Projects  No Responses »
Feb 122011
 
Bill O'Donnell - Tech Gizmo Builder

These are high tech jigs, fixtures and instrumentation/automation gizmos that bill built. Electrical gizmo builder for the UNLV Physics Dept. Bill O’Donnell – Tech Gizmo Builder These projects are advanced and not for a beginner student or newbie hobbyists. These pages are knowledgable and will help students and DIY enthusiasts understand more about Lasers, Precision Temperature Control and stepper motors among other things. Auto Fill Circuit for Laser Cooling Loop – Ethernet Data Logging Here is an automation solution with a ethernet usage. The code and diagrams are also there. This is something that covers many aspects of engineering in [Read More ....]

 Posted by delabs at 11:50 am

Measure R and C using uC without AD

 Design, Embedded  No Responses »
Nov 162010
 

This article describes how to measure values of a variable resistor or a variable capacitor using a microcontroller to measure the RC charge time to a constant threshold voltage. A variety of these “one-shot” circuits are described and the accuracy of the various methods is measured. Sample programs for the 87C51 family are presented at the end of the article. Measure resistance and capacitance without an A/D The old “one-shot” monostable multivibrator circuit has been around since the discovery of the electron. Popular IC versions of this variable pulse width generator include the 74123 and the famous (Philips) Signetics NE555 [Read More ....]

 Posted by delabs at 10:10 am

The power behind vibrant LED SSL – NXP

 Design  No Responses »
Nov 152010
 
The power behind vibrant LED SSL – NXP

L Prize for a LED Light Bulb as an Efficient and Reliable alternative for the common light bulb was won by a Lamp that used LUXEON LEDs. It has the flexibility and reliable performance that is needed for lamps. LUXEON Rebel White LEDs . NXP’s high-power AC/DC converter reference design enables fast proof-of-concept for single-color LED applications. It’s a fully tested solution based on robust components and proven technologies that simplifi es the design of solid-state lighting (SSL) luminaires. LED Lighting Systems – Philips “Solid state lighting (SSL) utilizes light-emitting diodes (LEDs), organic light-emitting diodes (OLED), or polymer light-emitting diodes [Read More ....]

 Posted by delabs at 10:14 am  Tagged with:

Open Source Hardware – OSHW Draft Definition

 Design  No Responses »
Aug 102010
 

OSHW Draft Definition 0.3 is based on the Open Source Definition for Open Source Software and draft OSHW definition 0.2, further incorporating ideas from the TAPR Open Hardware License. Open Source Hardware – OSHW Draft Definition Open Source Hardware (OSHW) is a term for tangible artifacts – machines, devices, or other physical things – whose design has been released to the public in such a way that anyone can make, modify, distribute, and use those things. From – Open Hardware Summit

 Posted by delabs at 3:23 pm

EDA and Product Design Ideas

 ASIC EDA, Design  No Responses »
Nov 272009
 

Some Ideas of mine that were put in delabs Tweeter, related to EDA and Product Design Product Design Optimization Make Practical (it works), Affordable, Usable (ergonomics), Safe, Reliable (robust), Durable/Consistent & Maintainable (Servicing) Products. Dust and Contamination in Connectors Once i opened a RF Millivolt Meter of Marconi Instruments. It did not have a spec of dust inside, not even one micron size of dust particle. Connectors exposed to Environment should not only be Corrosion resistant but also Dust, Grime & Insect Proof! Dummy Covers on exposed units. Air Vents, Fans & Unused Slots in Modular Instruments. Missing Fasteners in [Read More ....]

 Posted by delabs at 2:01 pm

PC User Interface and Wireless Power

 Design, Gadgets  No Responses »
Nov 202009
 

I got a Wireless Mouse from people who roast rss-xml. They gave me a mouse for interesting errors on my part. This mouse led me to buy two pairs of NiCd AA 1.2V and a Charger.Every three days i have to change a set of AA Cells. It is working out nicely, the wireless mouse is an advantage that you cannot ignore. Each time a sync has to be made between the mouse and an USB RF device. The optic ball-less mouse is a great step in mice-tech user-interface. This mouse consumes more power, for a wireless mouse a capacitive [Read More ....]

 Posted by delabs at 10:24 am  Tagged with:

Electrical Engineering Metrics – EEMetric.com

 Design, Main  No Responses »
Nov 052009
 
Electrical Engineering Metrics - EEMetric.com

Electrical Engineering Metrics What are the EE Metrics – Volts, Amps, Ohms, Henry, Farad, Watts and many more. “EE” is Electrical Engineering. “Metric” from Latin metricus is “relating to measurement”. Combining them is a Acro-Portmanteau. (Acronym) in reference to: EEMetric.com – Electrical and Electronic Measurement Technology (view on Google Sidewiki)

 Posted by delabs at 10:25 pm

CMOS Mixed-Signal Circuit Design – R Jacob Baker

 Design  No Responses »
Jul 272009
 
CMOS Mixed-Signal Circuit Design - R Jacob Baker

From Signals, Filters, Sampling, Aliasing to Data Converters. This book covers the fundamentals of Mixed-CMOS Design. CMOS Mixed-Signal Circuit Design – R Jacob Baker Published by Wiley-IEEE, ISBN 978-0-470-29026-2, 2nd Edition, 2009. The book’s author is R. Jacob Baker. Examples, Tutorials, and Videos. Some Chapters Chapter 3 Analog Filters 73 Chapter 4 Digital Filters 119 Chapter 6 Data Converter Design Basics 203 Chapter 8 Bandpass Data Converters 285 Chapter 9 A High-Speed Data Converter 301 This book will fill a hole in the technical literature for an advanced-tutorial book on mixed-signal circuit design. There are no competitors in this area. [Read More ....]

 Posted by delabs at 10:46 am  Tagged with:

Multiplexed Presettable Timer with ICM7217

 Design  Comments Off
Mar 172009
 

This was a attempt to make a Sequential Timer with ICM7217 of Intersil, even though it worked well, it was not developed beyond the prototype stage or first iteration. Only when a product is made in some numbers, the documentation and designs become clear, streamlined and seasoned. The PCB and Circuit are not complete. It may give ideas. During this time, as far as i can remember, these were the only large CMOS devices. 8080-85 and Z80 devices consumed lot of power and needed big boards and supplies. ICM7217 4-Digit, Presettable, LED Up/Down Counter Maxim Study this, if you are [Read More ....]

 Posted by delabs at 8:06 am
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