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  • The Electronics section of Changpuak has calculation tools for electronic circuits as well as some electronic projects like power supplies, signal generators and curve tracers too .…
  • Here are examples of an analog Input and Output interface for Printer Port. There are two visual basic demo programs with source to test out idea. Analog Interface for PC Ports USB and wireless interface to PC may be more in vogue, but a higher speed is…
  • These pages of mine and other sections of delabs lists firms and EE design resources around the globe, related to Professional and Hobby Electronics. This work of mine started in 1999 on netscape, geocities and tripod homepages. Now it is distributed…
  • Instruction Manuals of Process Control Instruments and Industrial Automation Solutions, Control Panel Diagrams, Wiring, and Facia. Temperature and Pressure Controllers form a large part of Process control Instrumentation. Then you have Flow, Humidity…
  • i had tough time filling a online form. Here are some points, many know already, but new ones need to be instructed again. Especially so in customer service online forms or apps. Make all the fill up text boxes ample, not cramped. Message area needs to…
  • Just like an electronic circuit is a graphical representation of what will be on the PCB. Firmware development should be a 2D graphical diagram of what goes into eeprom. An example is the Ladder Logic software that can program 80C51 types in a Fanuc,…
  • Take a Blank Epoxy Card. No Copper, just the glass epoxy card. It will not be copper clad. I am trying to explain the concept. The Glass Epoxy card as you know is Epoxy (Like Ciba Araldite) with glass fiber as filler. Maybe new technologies have come…
  • At dapj Tech you will find Tech Blogs related to Electronics Engineering, Hobby and Educational Resources too. Electronic Design Schematics of delabs - Circuit Diagrams, Design. Soldermans Basics - Tutorials, Theory, Fundamentals. Hobby Hound - Hobby,…
  • The very first designs that came about were analog designs, a Vacuum Tube amplifier is an example. Analog is the representation of data or physical parameter in an accurate and precise decimal number like + 72.182 mV. The greater the resolution…
  • A computer can be used to control or automate systems. From turning lights on/off at your home to shutting down motors or heaters in industries. Speed control and PID Control too. PC based Instrumentation is easy to implement using USB Devices and…
  • I once worked in Tek for a very short period. I got to experience the 2235 and 2465 analog scopes and their controls. The 2465 was a 400 MHz Digitally Controlled Analog Scope. I also used the Plugin System Scopes and Calibration systems; these were Tek…
  • Small Boards, SMT circuits and hybrid electronics need special tools. The soldering and handling require some tools and custom jigs which can be custom designed.  Some product are mass produced, some tools for managing and working on Tiny PCB's…
  • If you have made an electronic product with a new circuit or code and need to protect it, then these are some Methods. If your Intellectual Property is an Idea, A Hardware Innovation or Software Application; It may need some protection other than…
  • Most of the sensor interface and instrument inputs are analog; even if it event based like a limit switch, analog circuit protection and signal conditioning is required before it reaches the level sensitive digital circuit blocks. Starting with Schmitt…
  • Here are circuits made of Resistors, Capacitors and Inductors which are passive components. Crystals, Thermistors, Varistors, Variable Passive RLC are also Passive Parts.Some circuits documented from my design note book.
  • delabs designed and built many custom "engineered" Test Instruments. They were not prefect, as only one or two were fabricated. That means it will be costly to produce such instruments. It is just like tooling, you have to make some numbers to recover…
  • Make all Flash Memory in Home Appliance, Gadgets and computers - Easily Replaceable and Field Replaceable. If possible replaceable by layman like batteries. Many people are having problems and high costs of service, as equipment and devices made over…
  • Running LED, Random Results, Decade Counter and Clock. Weigh the Pros-n-Cons, Take a Balanced Decision with the Blue Toss Widget. Screenshot above This can be built with one 555 timer and a CD4017. Use the pin 5 to connect to a cap you charge with a…
  • Simple Hourglass Clock, Track Time Progress, Shows Time, Date, Weekday and Week of Year. Time flies but the Hourglass Clock helps you keep a watch on the endless flow of time. This fights procrastination, then the project will be done in time. There…
  • The PC has much Evolved, From XT to AT, then from 286 to 586, the evolutionary trend continues. The Speed: GHz, Space: GB and Software: Linux-XP, have grown rapidly. The other vital things Interface, Networking and Power Consumption moved a bit slower.…

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