Solderman Basic Electronics

Basic Electronics, Practical Electronic Projects, Learning Circuit design, Electrical Fundamentals. Edutainment and Interactive Examples.

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Wednesday, November 04, 2020

Analog Blind Dial On Delay Timer

It is called analog dial timer as it has no digital display, but the chip is digital it is CD4541. It is Mains operated, you could make on-delay or off-delay. By changing the caps and resistors or with even dip-switches you could get timing of few seconds to many hours. Circuit is Analog Timer 4541 .

Analog Blind Dial On Delay Timer


Some timers energize the relay after a set delay on power start. Some start with relay energized and turn off after set time. Motors and big systems cannot take fast turn-on and turn-off, Some systems will require sections or modules to start one after another as they are interdependent. 

Tuesday, November 03, 2020

Design of a ADC Interface

Design of a ADC Interface for Microcontroller.

This is in continuation of the thread called "Design of a Thermocouple Amplifier" doc00023.html which is in the same section .

This is just a formatted-edited email thread exported from Eudora from my mailbox using the content concentrator. The circuits below were made by TF a student, This thread has been put online to share information.

The part under "From: delabs" are my writing. there may be some mistakes and broken links.

Tutorials on Basics and Instrumentation Electronics  

Circuits Drawn by the Student.

1. ADC Circuit.





Communications – Australian Photonics CRC

The Communications Revolution, Communications Networks, Optical Fibers, Photonics Devices, Future of Communications, 

Communications - Australian Photonics CRC

"In order to communicate effectively, humans developed languages, signs and writing; however, communicating over long distances has always been a slow process…"

Communications – Australian Photonics CRC

"Some African tribes still use drums to send messages across the savanna."

"On May 24th, 1844, an American artist and inventor called Samuel Morse (1791-1872) sent the first telegraph message from the Supreme Court Chamber of the U.S. Capitol Building in Washington D.C. to a receiver in Baltimore, some 65 km away."

"Thomas Doolittle developed a new process to draw strong copper wire. Because of its better electrical conductivity over iron, copper wires became the standard in telephony."

Thursday, October 08, 2020

The Scots Guide to Electronics

This course is designed to help you learn about components, circuits, and the use of electronics. You can explore the contents in whatever order you wish.The emphasis is on providing information starting at the 'absolute beginners' level, but we hope eventually to provide material of use to anyone interested in electronics and its applications ...

The Scots Guide to Electronics

This section of the Scots Guide deals with Analogue Electronics with a special emphasis on Audio-related topics. There are also some specialist pages on the properties of cables as these relate to audio.

The Scots Guide to Electronics

The First Eleven - Basic electronics courses sometimes make it appear as if electronic engineers have an obsession with voltmeters, batteries, and oscilloscopes. That's because it's often convenient to talk about these when presenting a course at a university, college, or wherever. In reality, the physics and electronics of practical systems like Hi-Fi's, TV's, computers, etc, are much more interesting.

The main components used in electronics are of two general types: passive (e.g. resistors and capacitors) and active (e.g. transistors and integrated circuits). The main difference between active and passive components is that active ones require to be powered in some way to make them work. Active components can also be used to amplify signals.

by J. C. G. Lesurf University of St Andrews Astronomy Group, Scotland.

Category Engineering - Wikibooks

This category contains a number of subcategories, books, and pages related to Electrical engineering. Books can be found on the Engineering EE. Courses can be found at Wikiversity:School of Engineering.

Subcategories include specific engineering disciplines, including Electrical Engineering, Computer Engineering, Mechanical Engineering, and Civil Engineering. Also, some books that are general to all disciplines are listed here.

Digital-to-analog converter

A DAC converts an abstract finite-precision number (usually a fixed-point binary number) into a physical quantity (e.g., a voltage or a pressure). In particular, DACs are often used to convert finite-precision time series data to a continually varying physical signal.

Digital-to-analog converter

Analog and Digital Conversion, Automatic Control Engineering, Automotive Systems. Basic Electrical Generation, Basic Electricity, Biography of Nikola Tesla.

Circuit Idea, Circuit Theory, Communication Systems, Control Systems. Digital Circuits, Digital Signal Processing, Electronics, Embedded Control Systems Design

Embedded Systems, Practical Electronics, Power Systems Analysis, Design, and Control Microprocessor Design, Engineering Tables, Semiconductors, SensorNetworks

Thursday, October 01, 2020

Electronic Shift Monitor

The Security Guard duty monitor below, shown in eight circuits at Digital Circuits - 1 are examples of logic circuits, i have converted them from the DOS Orcad to Orcad 9 and corrected some errors a few years back.

Electronic Shift Monitor - delabs

These circuits can be used for looking at the logic blocks or to learn. This product was built and sold to some firms many years back. Now these designs are best done with a PIC or Atmel chip. Here is the user manual

This circuit was done with CMOS CD40xx type of ICs. A RAM was used to store the Day/Time LED Status.

It was to monitor the Alertness of the Security Guard. Periodically the Unit will Buzz and Flash and the Security Guard has to press a Big Button to indicate he is awake, alert, agile and around the Unit.

All Green means fine, few Red LEDs means the Guard was sleeping or gone away from some times. All Red means Security Guard is missing. :-)

Sunday, September 06, 2020

Analog Mux for Data Acquisition Systems

Here is a 4-20 mA In/Out Analog Mux with Cascade option. This is a simple circuit i designed to make a Automation System within a budget.

Analog Mux using 4051

This takes 4-20mA from many Transmitters and gives out just one 4-20 mA output. The Mux is done with a digital byte or word.

 Industrial Process Control Circuits

This is a slow scanner as process is slow, that way many analog inputs can be multiplexed and sent into one analog input of a D/A. In near real time systems a faster mux could be used or mux totally avoided. This was made in some numbers, so the pcb is better than others.

4-20mA Multiplexer Circuit - pdf

Tuesday, September 01, 2020

Online Electrical and Electronics Books

Some books that will help you learn electronics and are free too. Youngsters have a great wealth to find in the libraries. The Present day has made more information available online, it supplements the library resource.

What can never be found in libraries are found on the net and can be searched too. Here every individual shares his projects, ideas and designs and is not edited or moderated by any publisher or media.

- delabs Notes

Navy Electricity and Electronics Training Series (NEETS)

These are nice Mini Reference Books that can build the Learning of EE students. Some interesting booklets - Circuit Protection, Control, and Measurement; Intro. to Wave-Generation and Wave-Shaping; Microelectronics and Test Equipment..

Navy Electricity and Electronics Training Series

Some of the Books on Embedded Systems and Communications are quite good and even the sample chapters will bring an appetite to study the subject and buy the Book.

United States Navy Electricity & Electronics Training Series - NEETS

The Navy Electricity and Electronics Training Series (NEETS) was developed for use by personnel in many electrical and electronic related Navy ratings. Written by, and with the advice of, senior technicians in these ratings, this series provides beginners with fundamental electrical and electronic concepts through self-study. The presentation of this series is not oriented to any specific rating structure, but is divided into modules containing related information organized into traditional paths of instruction.