One of the oldest Schematic Archives on the Web. It was in the form of pdf files in the late 90s. Instrumentation and Industrial  Designs by delabs and Generic Application Designs. \ \ I am an Electronics Product Design Engineer, I used to work in the R&D Areas, Designing Electronic Products. Then i had my own firm, manufacturing Instrumentation and Scientific Custom Equipment. - [Power Electronics](https://www.delabs-circuits.com/cirdir/power.html) - [DC Load DC Control SSR](https://www.delabs-circuits.com/cirdir/power/static-relays/del30007.html) - [DC-AC Solid State Relay](https://www.delabs-circuits.com/cirdir/power/static-relays/del30008.html) - [NO AC Load SSR DC control](https://www.delabs-circuits.com/cirdir/power/static-relays/del30009.html) - [PCB AC Load SSR DC control](https://www.delabs-circuits.com/cirdir/power/static-relays/del30010.html) - [NC AC Load SSR DC control](https://www.delabs-circuits.com/cirdir/power/static-relays/del30011.html) - [AC-AC Solid State Relay](https://www.delabs-circuits.com/cirdir/power/static-relays/del30012.html) I started designing circuits in the early 80s. I came online in the late 90s. My first circuit site was made of the PDF circuits that was part of the Engineering Documentation of my own Firm started in the early 90s. I put it online as they were of educational value and could be useful reference to all. \ \ delabs is made of a few tech websites online, It is an archive of my experience in Industry and Business.  I have a wide exposure in the broad area of Electronics Engineering, Automation, Instrumentation and Industrial Components. - [Analog Circuits](https://www.delabs-circuits.com/cirdir/analog.html) - [Square & Triangle Oscillator](https://www.delabs-circuits.com/cirdir/analog/opamps/del50011.html) - [Inverting Amplifier Op-Amp](https://www.delabs-circuits.com/cirdir/analog/opamps/del50012.html) - [Non-Inverting Amplifier Op-Amp](https://www.delabs-circuits.com/cirdir/analog/opamps/del50017.html) - [Differential Amplifier OpAmp](https://www.delabs-circuits.com/cirdir/analog/opamps/del50013.html) - [3 OpAmp Instrumentation Amp](https://www.delabs-circuits.com/cirdir/analog/opamps/del50016.html) - [Buffer or Unity Gain Op-Amp](https://www.delabs-circuits.com/cirdir/analog/opamps/del50014.html) - [Two Op-Amp Differential Amplifier](https://www.delabs-circuits.com/cirdir/analog/opamps/del50015.html) **Important Note**\ \ My Creative Work, ideas and documents can be used for Product Design and Development by R&D Engineers, Hobbyists, Students and even firms for creating useful products. These cannot be used for reprint, replication or publishing online or offline.