Sunday, August 14, 2016
The Philbrick Archive and Operational Amplifier
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 ".
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.
Wednesday, July 06, 2016
The electronic logbook is amazing, you can have a look at so many circuits and projects with photos. You will learn many things and make you develop skills.
Elektronik und Mikrocontroller - Burkhard Kainka
For the advanced Hobbyist there are projects on Microcontroller and Measuring and control devices with the USB and PC Interfacing,
SDR Radio with USB
Electronics experiments for children - "For children it is easier than for adults. Since it is enough, if someone applied sufficient time and a little tinkering with them. Often all it takes is a little push to arouse interest and skills."
Friday, May 08, 2015
Design and Technology Site
The information sheets cover a wide range and include, the design process, gear systems, electronics, cams, printed circuit boards, PIC microcontrollers / computer control.
Topics - RoboLab, PCB Work, Computer Control, PIC Control, Product Design, Electronics, Design Process
Potentiometers are used in circuits, when it is necessary to alter the resistance. Dark/light and temperature sensors usually have these components, as the potentiometer / variable resistor allows the circuit to be made more or less sensitive (they can be turned up or down - reducing or increasing resistance).
Tuesday, January 06, 2015
De Beer Gino an Engineer of Belgium had made a Resource called Educypedia ..."A free online encyclopedia, stands for educational encyclopedia. The goal is providing people a gateway the best electronic sources (technical and scientific matter) on the internet."
Early 2000 Educypedia
This Resource was most popular in the late Nineties to early 2000 times. Then he hosted it in a domain educypedia.be. Around 2009 the links to the valuable pages are broken.
Educypedia Electronics Mirror - Thanks to karadimov.info
This is the best mirror of educypedia, but many outgoing links are broken as many websites have gone ! See most at "The WayBack Machine" Even the Lost ones.
Educypedia - Electronics - Thanks to Archive.org
Sunday, October 26, 2014
Aaron Cake Electronics
The Schematic Symbol Reference, How To Solder and Desolder helped many electronic beginners in building their Projects. This was a valuable resource in those days even though it appears common today. The internet was used to genuinely share useful learning and ideas.
Wednesday, October 09, 2013
Voltage Monitoring is an Electronics board that allows you to connect 5 to 14VDC on one side of the board and get it corresponding LEDs light on the other side. Every Car, tractor or boat should have one.
Battery Monitor for your Boat or Car
The boards will allow you to easily monitor your 12V battery while powering from the same battery. The Terminal Block TB connector is included and makes it easy to use.
The LM324 is the Heart or Intelligence in this Circuit. There is a voltage divider and zener too. They have a kit and pcb to buy and build .
A battery of a car can drive enormous amount of current, anything that is High-Voltage, High-Current or High-Frequency or a combination of these; are known to be high energy circuits. So as a precaution when you wire the positive to the car battery use an automobile fuse with holder like the one used outside the stereo player. The fuse has to be outside!
You could also use a fusible resistor in a metal box and keep it outside, the 12V positive has to go thru this. Any car/boat project needs this. A short circuit on PCB or Wire will blow fuse and everybody is safe.
Got it ..
Saturday, August 17, 2013
Charles Proteus Steinmetz
(April 9, 1865 - October 26, 1923)
He made ground-breaking discoveries in the understanding of hysteresis that enabled engineers to better design electric motors for use in industry.
Charles Proteus Steinmetz electrical engineer
Hysteresis - Charles Proteus Steinmetz
"Eickemeyer wanted to expand into electrical motors and generators, a brand new field in 1889."
AC hysteresis theory
Shortly after arriving in the U.S., Steinmetz went to work for Rudolf Eickemeyer in Yonkers, New York, and published in the field of magnetic hysteresis, which gave him world-wide professional recognition.
Eickemeyer's firm developed transformers for use in the transmission of electrical power among many other mechanical and electrical devices. In 1893 Eickemeyer's company, along with all of its patents and designs, was bought by the newly formed General Electric Company, where he quickly became known as the engineering wizard in GE's engineering community.
I read about Steinmetz long ago in a Reader Digest that belonged to my grandfather. It was dated like 1950-60. These issues have become brown and have been ruled by silverfishes.
I cannot find that article but i remember it roughly ......
People from/related to GE had problems with thier electrical equipment heating up a lot. Then they heard of this person of Germany who had mentioned about some remedy to such issues.
They visited him in his loft or some upstairs room where the solution to this problem was discussed and the rest is remarkable history for Electrical Engineering.
The part of the story i remember most was that in one of his wardrobe drawers, a Mama Mouse had made it her home and was also having her kids here. Not only did the compassionate Steinmetz allowed it to keep her quarters, he even attended to the new family with some food and necessities.
Heard of very few angels like this.
by Anantha Narayan delabs
Monday, December 08, 2008
Heathkits - Learning with Practical Electronics
THD Improvement kit for IG-18 series audio generators
"The meter buffer is a crucial part of improving the THD specification of the IG-18. The non-linear loading of the analog output can create additional harmonic components due to the non-linearity of the diodes used to drive the meter."
History and Antiquity
In 1947, Heath introduced its first electronic kit, an oscilloscope that sold for US$50 -- the price was unbeatable at the time, and the oscilloscope went on to be a huge seller. Heathkit Wiki.
The Heathkit Virtual Museum, a tribute to the Heathkit era-a time when building electronic kits was a favorite pastime for many electronics hobbyists. This commemorative virtual showcase takes you back to the Heathkit age which began in the late 1940's and lasted through the early 1990's.
Then you ought to look around at Bill Wilkinson's Heath Company Page if you want to know more.
Saturday, February 02, 2008
If you are aged between 8 and 10 and wanting to learn about electricity and circuits then this is the place for you. Learning Circuits will guide you through 6 tutorials and then quiz you to test your knowledge.
Electricity and Circuits reinforces what your children learn from Physics at School, it takes the form of a virtual learning environment which reinforces Sources of Electricity, Circuits and Conductors, Changing Circuits andCircuit Diagrams.
Friday, January 11, 2008
4QD-TEC: Electronics Circuits Reference Archive.
- Electricity - an analogy with water
- LED VU meter
- Colour codes and multipliers
- Logic circuits using discretes
- Gyrator - used in graphic equaliser
- Thermometer and thermostat