Circuit Diagrams of delabs Technologies

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Electronic Circuits and Product Designs

DMM with ICL7103A and ICL8052A

The purpose of this application note is to describe the operation and potential pitfalls of a 10V resolution (VREF = 100mV) 4 1/2 digit autoranging scheme using the ICL7103A/ICL8052A pair. Two auto-ranging circuits are included within the text. Each is discussed in terms of its advantages and disadvantages.

on: 11/2/2021

Battery Operated Auto Ranging DVM

This application note describes a technique for auto-ranging a battery operated DVM suitable for panel meter applications. Also, circuit ideas will be presented for conductance and resistance measurement, 9V battery and 5V supply operations, and current measurement.

on: 11/1/2021

ATmega328 Single Board Computer SBC

The Atmel 8-bit AVR RISC-based microcontroller combines 32 KB ISP flash memory with read-while-write capabilities, 1 KB EEPROM, 2 KB SRAM, 23 general-purpose I/O lines, 32 general-purpose working registers, 3 flexible timer/counters with compare modes, internal and external interrupts, serial programmable USART, a byte-oriented 2-wire serial interface, SPI serial port, 6-channel 10-bit A/D converter...

on: 10/23/2021

Universal Signal Conditioning

Here is a practical application of the dual differential amp. This circuit is for DC or slow moving DC like Strain Gauge and transducer signals. The RC and Zeners are for protection and clamping. Why and how has been described in other posts here. The high impedance op-amp input cannot face the real world unprotected. OP07 is always the selection due to the low offset. When the sensor generates data in mV, you cannot afford any error introduced in this front end, right.

on: 7/26/2019

LM331 A to D Mux Input Switch

This is the full circuit of a V/F convertor interface for 80C31 SBC. The Mux is configured for selecting between two inputs. It uses analog switch 4066. LF353 along with LM331 form the VCO, you can further study such configuration in the Application Notes of TI/NS.

on: 7/24/2019

Two Stage Sequential Timer

This is an example of a cascaded or sequential timer, here two CD4541 are forming a two stage timer. You can add more in a chain, but better to use a microprocessor or Microcontroller for such a purpose. But make sure EMI-RFI immunity is high for these circuits or wrong resets and sets can make a machine like an Oven or Environment Chamber malfunction and even ruin the job.

on: 7/24/2019

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.

on: 7/12/2019

Battery Level Indicator

Battery level voltage measurement is best done with a dummy load. This circuit has four LEDs to show the charge left. It is important to avoid overcharge or deep discharge of rechargeable batteries. Never try recharging normal batteries. Using rechargeable batteries are good for the environment.

on: 7/11/2019


delabs Technologies News

WordWeb dictionary and thesaurus

WordWeb is an international English dictionary and thesaurus program for Microsoft Windows, partly based on the WordNet database. Hundreds of thousands of definitions and synonyms. The latest international English words. Works offline, or reference to Wikipedia and web references.

on: 12/23/2021

The Oath of Aristotle

Cheer up the New Year by creating colorful, safe, ergonomic, affordable and innovative product designs. May the Force be with all of you. The Hippocratic Oath has been thrown aside by the Health Care Community. Engineers should follow Aristotle both in creativity and also ethics.

on: 12/18/2021

calibre e-book manager

calibre is a powerful and easy to use e-book manager. Free and open source and great for both casual users and computer experts. Save time on managing your e-book collection Use it everywhere and with anything, Comprehensive e-book viewer. pdf, txt, cbz, chm, docx, epub, html, rtf... It can also talk to many e-book reader devices.

on: 12/16/2021

Wikipedia free online encyclopedia

Wikipedia is an online free content encyclopedia project helping create a world in which everyone can freely share in the sum of all knowledge. It is supported by the Wikimedia Foundation and based on a model of freely editable content.

on: 12/7/2021

FileRun - File Sharing

Online File Sharing, Installs on any type of web server, Access your files from anywhere desktop, tablet or browser. Point FileRun to where you keep the files on your server and you will get instant web access to them. Sync files from your desktop using the Nextcloud desktop sync apps. 

on: 12/3/2021

Project Gutenberg Library

Project Gutenberg was the first provider of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and his memory continues to inspire the creation of eBooks and related content today.Choose among free epub and Kindle eBooks, download them or read them online. You will find the world’s great literature here.

on: 11/29/2021

DokuWiki - Light Fast Portable

DokuWiki requires only a webserver and PHP; no database is needed. DokuWiki has an integrated indexed search with which a user can search for keywords and phrases on the wiki. DokuWiki was created by Andreas Gohr. Easy maintenance, backup and integration. Built in access controls and authentication. Many useful plugins.

on: 11/25/2021

SeedDMS Organize Documents

SeedDMS is a free document management system with an easy to use web based user interface. It is based on PHP and MySQL or sqlite3 and runs on Linux, MacOS and Windows. Powerful platform for sharing and storing documents. SeedDMS offers lots of features, while being simple to install and intuitive to use.

on: 11/23/2021

PluXml - Blog and CMS on XML

With just an Apache web server and PHP you can create a very fast website. It has a blog for articles and pages too. FlatFile xml database, there is a plugin for visual editing of articles. Mail notification for comments and an innovative captcha which is pleasant to use. Plugins for friendly URLs and other useful features. Thank You  - delabs 2020 

on: 11/20/2021

RainLoop - Simple and Modern Web-based Email

Administrative panel for configuring main options.  Managing folders list.  Simple look'n'feel customization.  Configurable multi-level caching system.  Extending functionality with plugins installed through admin panel.  Perfect rendering of complex HTML mails.  Drag'n'drop for mails and attachments.  Keyboard shortcuts support.  Autocompletion of e-mail addresses. 

on: 11/19/2021

XAMPP free and open-source web server

XAMPP is a completely free, easy to install Apache distribution containing MariaDB, PHP, and Perl. The XAMPP open source package has been set up to be incredibly easy to install and to use. WAMP or LAMP stack with OpenSS, FileZilla, phpMyAdmin, Mercury Mail, TomCat Java.

on: 11/12/2021

Notepad++ free Code Editor

Notepad++ was developed by Don Ho in September 2003. Ho first used JEXT (a Java-based text editor) at his company but, dissatisfied with its poor performance, he began to develop a text editor written in C++ with Scintilla. Notepad++ is a free (as in “free speech” and also as in “free beer”) source code editor and Notepad replacement that supports several languages.

on: 11/9/2021

Scribus - Desktop Publishing

Scribus is free and open-source desktop publishing software available for most desktop operating systems. It is designed for layout, typesetting, and preparation of files for professional-quality image-setting equipment. Underneath a user-friendly interface, Scribus supports professional publishing features, such as CMYK colors, spot colors, ICC color management and versatile PDF creation.

on: 11/5/2021

Bittele Electronics - PCB Manufacturer and Assembly

A One-stop PCB Assembly Services, including PCB fabrication, parts procurement and PCB Assembly. "We verify all details of your files, including BOM (Bill of Materials) and Gerber files, to allow you to correct your PCB design before manufacture, saving significant time and cost, and avoiding unnecessary repeats of the prototyping assembly process."

on: 11/3/2021

PCBWay - PCB and Assembly Services

Just like PCB business, PCBA services also specialize in prototyping and small-volume production, making PCBWay the one stop destination of boards fabrication and assembly. This arrangement makes your R&D work easy and time-saving. PCBWay a PCB manufacturer Supports Non-Profit Projects – Considering a large proportion of electronics enthusiasts are students or beginners, PCBWay has created dedicated channels for sponsorship to encourage these electronics enthusiasts to create their own projects. 

on: 11/3/2021

Flintec - Weight and Force Measurement

At Flintec, we supply and manufacture weight and force measurement components for use in variety of industries and applications. Our standard range of products include force sensors, load cells and weighing electronics. We also offer customers a custom solutions service, which designs and manufactures a product to your exact needs.

on: 11/2/2021