Hobby Projects - Insulation tester, LED Circuits, Meters.
Showing posts with label Analog. Show all posts
Showing posts with label Analog. Show all posts

Sunday, August 14, 2016

The Philbrick Archive - Bob Pease and The OpAmp

This site is a free non-profit repository of materials from GAP/R George A Philbrick Researches, the company that launched the commercial use of the Operational Amplifier in 1952.

The Philbrick Archive and Operational Amplifier

The Philbrick Archive - Bob Pease and The OpAmp

The first commercial Operational amplifier was the K2-W op-amp. It was based on the amplifier used in the Philbrick modular Analog-Computor "black boxes ".

First Opamp K2-W op-amp

That amplifier's basic circuit architecture, in turn, was probably inspired by an earlier amplifier designed by Loebe Julie (Dan Sheingold and Bob Pease, thanks for helping me with this information). The K2-W Operational Amplifier entered the commercial market in 1952.

Friday, April 19, 2013

Paul Falstad EE Applets and Tablet Apps

"These are some educational java applets I wrote to help visualize various concepts in math, physics, and engineering." - Paul Falstad

Electronic Educational Applets - Paul Falstad
  • Math and Physics Applets - MyPhysicsLab - Physics Simulation with Java.
  • Index of Circuit Examples - Demonstrates various electronic circuits.
  • Digital Filters - Filters digital signals and plays the output on your speakers.
  • Acoustic Interference Applet - Audio interference between your speakers.
  • Waveguide Modes Applet - Electromagnetic waves in a waveguide.
  • Antenna Applet - Generates antenna radiation patterns.
Analog Circuit Simulator Applet - Demonstrates various electronic circuits.

"This java applet is an electronic circuit simulator.  When the applet starts up you will see an animated schematic of a simple LRC circuit. The green color indicates positive voltage.  The gray color indicates ground.  A red color indicates negative voltage.  The moving yellow dots indicate current."

Derivative Works

iCircuit is the easy to use electronic circuit simulator and designer - the perfect tool for students, hobbyists, and engineers.

Its advanced simulation engine can handle both analog and digital circuits and features realtime always-on analysis. It is the perfect companion to students, hobbyists, and engineers.

Learn + Make + Teach Electronics at EveryCircuit

Electronics at EveryCircuit 

Build any circuit, tap play button, and watch dynamic voltage, current, and charge animations. This gives you insight into circuit operation like no equation does. While simulation is running, adjust circuit parameters with analog knob, and the circuit responds to your actions in real time.

Friday, December 17, 2010

Analog Op-Amp Tutors with Gadgets

I have made some iGoogle Gadgets with canvas view, these are analog opamp tutors. Interactive Tutorial with Simulated Meters and Potentiometers, demonstrating how Operational Amplifier functions in different configurations.

Interactive Tutorials using Virtual Electronic Components 

Slide the Potentiometers just like you would operate a Sliding Control. Drag the Knob on Pot to increase or decrease the resistance. The Resistance is shown is blue letters and dynamically alters value as you slide the pot.

The mV Source is varied by just moving mouse pointer over the two buttons, no clicking. This reduces finger strain and also you have a long lasting mouse. The mV buttons are special, the variation picks up speed if you let the mouse pointer remain on the button. This is Ramp-up and Ramp-down. This enables you to set it faster with just two buttons.

Finally you have a DVM a Digital Volt Meter that just Displays the Voltage at any Point, this readout value has to be noted down.

Op-Amp Simulation using Javascript

From Soldermans Basic Electronics

If you wish to examine the code - Analog Tutorials Project Page

Introducing a new delabs icon - Elektrick the Power Jedi

I am also attempting a Toy Scope or a waveform display.

Sunday, September 27, 2009

Dial based Analog Multimeter

In those days small firms used to make DPM's digital panel meters with 7107. In 1987 when i got a opportunity to design a DPM for a firm, I put the 555 clock in place CD4009 clock shown in intersil, to derive the -5. I created this design to study Eagle Editor. It is not tested by me, but all concepts/modules have been used by me in my designs earlier. It ought to work with some tweaks.

Analog Dial AVO Amps-Volts-Ohms meter

Analog Dial AVO Amps-Volts-Ohms meter

 This was designed, keeping in mind, that sometimes we have few components available and we could be flat broke. Even that you could not carry your DMM somewhere, but you have to make some instrument for a quick need with what is available. If you are out of cash or feel like Robinson Crusoe, then this is a low cost measurement system.

ESI Electro Scientific Inc. 250 DA Impedance Bridge

How they used to measure with Precision before the advent of new technologies..... See the Instrument above. If you can afford it, buy it as a Lab God. Something you can worship before every new project. Its Presence itself will make you bow a few times before this "Stupendous Excellence". What Dignity and Bearing at this age, they don't make this kinda things no more.

ESI Electro Scientific Inc. 250 DA Impedance Bridge