delabs PDF Circuits

I am now Organizing and Updating my main product design sections. Many Useful Websites and Nice Firms have gone over the last few years. I had to update to remove many broken links and improve navigation. These parts of my websites partially represents my Test-Measurement and Instrumentation firm i ran for some years. It also contains many of my designs and circuit innovations from my early days.

2020 -  The HTML pages are now Responsive from Computer Tablets, Notebooks to Large Monitors. All sites are SSL means https: Private and Secure.

delabs PDF Circuits

In 1999 most of my circuits in the OrCad and PDF Formats were uploaded as zip files in free websites of Netscape and Tripod. Then i got suggestions, Feedback and Thank you letters from all round the world. Later some support, encouragement from enthusiasts and engineers in the US and Europe made me improve the Websites "CMS" and content organization. I am now updating my Plain old HTML Pages for the 4th time in 15 Years.



Some parts of delabs/dapj use the CMS Technologies of The LAMP Stack  that arrived later. The New Tech Blog areas link  many EE firms and Resources all over the world. The tech cladistics i developed and used to organize my content is intensive.

Please note these technical pages are for Electronic Enthusiasts and Engineers around the globe for Reference and to improve basic Design capabilities.

These pages or ideas of delabs technologies and dapj tech cannot be copied, replicated or used for content development online or offline print materials.

Instrumentation and Industrial Design

• Analog Circuits - OpAmp, Signal Condition, Mixed Signal.
• Digital Circuits - Logic, CMOS, Counters, Timers, 555.
• Power Electronics - SMPS, Regulated Supply, SSR.
• Microcontroller - 8051, 8052, OpCodes, Analog Interface.
• Test Measurement - Multi-Meters, Small Test Tools.
• Data Interface - Virtual Instrumentation, Device Networking.
• Custom Projects - Sequential Process Timers, Chargers.
• Hobby Projects - Insulation tester, LED Circuits, Meters.
• Theory Tutorials - Basic Electronics, Instrument Design.
• Electrical Diagrams - Control Panels, Reference Tables.
• Resources - Electronic Firms and Electronic Projects

EE Design Library

This is a curated list of EE Pages from delabs websites and blogs. It is an attempt to organize delabs created ee reference pages in one place.

Analog Product Design - Here are design aspects of circuits using Op-amps and Comparators. Discrete Semiconductor Circuit design like using Transistors and Diodes. RLC parts.

 Electronic 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.

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

Power Electronics - 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.

Components Materials  - 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.

EE Design Library - Electronic Product Design Resource.

Measurement is everything, and an Oscilloscope is a EE Stethoscope.

delabs Technologies - 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.

Electronic and Instrumentation Tables

Tables, charts, quick reference cards, booklets and handbooks; are the most versatile tools of learning and putting the learning into applications. These should not have a lot of language or flowing text. These are - to the point, easy to remember, graphical, colorful (memory aid).



Just like a circuit diagram, flow chart or ladder logic can graphically interface with a human mind, Tables and Charts easily embed into ones memory.

Electronic Tables and Charts

• Exponents - Giga Tera Pico Nano
• Ohms Law - Amps Volts Watts Relation
• Types of Resistors - Color code
• Binary and Hexadecimal System
• Thermocouple and Pt-100 RTD
• High Resistance Insulation Materials
• Mains Voltage Power Transformers

MCS48 Code for 80C39 Microcontroller

80C39 is a Cmos Version of 8048 the one that preceded 8031-8051. MCS48 is the set for that, MCS51 is the current set.

Here is an example project for 80C39-8748-8749 microcontroller. This code was written by me, and it works. But the documentation is not complete or may have errors.

80C39-8749 MCS-48 Examples and code.

Process Controller code here 80C39 Code for MCS48. The circuit for these are on this page along with other circuits.

This may be difficult to put together now. But the code and hardware is near compatible to 8051 uC. Now there are may types of ADC and uC.

The circuit of the Analog Front End was a V-F Converter

This was supposed to have Analog in and Analog out. Some parts of the circuit may be in the 80C51 page. This has ramp-up and ramp-down settings for the Increment and Decrement buttons. This helps setting setpoint quickly. There is also debouncing for the pushbutton.

Electronic Engineering Resources

Sponsored EE Resources - This section is being added to financially support the delabs internet resources spanning many domains and blogs. Request a Sponsored listing here using the delabs Contact Form.

Sponsor or Donate - You can donate using PayPal to support the work of delabs and dapj. When you donate USD 100 and above you will be listed in the delabs page with your Website or Blog.



Your Company or Business also will get a free listing for Five Years as a Sponsor in our Electronics Resources Directory, in an appropriate category. This listing will also be mirrored at Electronics Resources. Request the Sponsored Listing using our Contact Mail form.



Some Electrical and Mechanical pages closely related to Electronic Manufacturing and Industrial Engineering will also be listed here. Each Subject page is also a Stub for listing and recording the specific subject related writing and posts of delabs in various other blogs and sites.

Categories of EE Websites of Firms and Resources

• Circuit Diagrams Archives Reference
• Embedded Microcontroller Resource
• EDA CAD Circuit Design Software Tools
• Electronic Engineering Magazines
• ASIC, SOC, CPLD, DSP and FPGA
• Electronics Resources and Tutorials
• Industrial Automation & Process Control
• Test & Measurement, Instrumentation
• Semiconductor and IC Application Notes
• Datasheets, Standards & Service Manuals
• Components Parts Kits and Materials
• Power Electronics & Solar Energy

Power Electronics and Mains Power

Updated pages, and integrated new pages with some explanations. These are related to mains power and power electronics.

Power and Energy - Mains Voltage and Power Circuits

Electrical Power can be used for most anything. It also can be stored and used later using Batteries. Alternative Energy Solutions like Solar, Wind and Tidal are providing new sources of Energy.

Fossil Fuels are running out and we have to become more energy efficient. Notebooks and Tablets are fast replacing desktop computers. Network servers and Cloud Solutions still use more power than needed. We have to use power for Productive and Creative activities.

Wastage of too much power leaves a mark, a carbon footprint, we also should shift to the low safe voltage standard of 24V. This will make conversion and distribution safe and solar energy friendly.

Power Electronics & Energy Systems



Tables related to Power Electronics

• High Resistance Insulation Materials
• Mains Voltage Power Transformers

Ohms Law - Amps Volts Watts Relation

Discrete devices and other circuits

• Isolated dual power supply from 5V
• Basic Relay or Solenoid Driver
• Battery Level Indicator.

Theory- Electronics and Instrumentation

Learning electronics in theory by studying books is the conventional way, this method may help in History and Maths. Maths needs a paper and pencil for practicals and history needs a well equipped Library. In these modern times, the web has made access to wide range of learning information easy, which is true Knowledge Empowerment. The greatest gift a Child can get from the Parents or School, is Knowledge.

Electronics Theory and Tutorials  

Process Control Instruments - These are some instruments i manufactured when i used to run my own industrial automation business.



Now many Virtual Electronics Workbench Software and Interactive Tutors are available, these aid learning. We have to design, build and apply some electronic ideas in 3D Hardware, for complimenting the Book, Academic or Web learning.

Practical and Theoretical study in electronics has to be in Tandem, this is possible only when Industry works with Universities to create real talent and skills in students. The applied technology is evolving, hence the academic education must be relevant when the student gets into his first job.

• Industrial Process Control Applications
• Process Control Instrumentation
• Instruction Manuals - Control Panels
• Test & Measurement Instruments
• Tutorials on Basics and Instrumentation
• Tutorials on Digital Electronics

The Evolution of Temperature Control

A closed loop controller is the heart of an Industrial Automation System. Right from an On-Off Hysteresis Controller to a Auto Tune PID Controller, we find solutions of different complexities. Each solution might suit a particular system; depending on the requirements of Ease-of-use, Cost and Process Type.

• Industrial Process Control Applications
• Process Control Instrumentation

A PC based multiplexed scanner controller with data-acquisition cards and I/O Cards can be solution for Laboratory or Research. This is used when real time control is not required or where the control failure will not lead to damage or loss.

A PLC or Microcontroller based controller should be used with a Analog Controller Protection or Over temperature Trip-Alarm.