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."