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Sunday, September 15, 2019

555 based Reset Generator

You must have read all the circuits and explanation on the other pages at delabs to understand this, as i cannot repeat the same thing as i have done it more than once already.

The circuit is a 555 monostable, The push-switch is to trigger and generate a reset pulse for uC. The diode is for OR' ing later. The High will go thru the diode but the Low of 555 cannot drink any current as diode blocks.
555 based Reset Generator
The bottom part of the Circuit is the CD4093 Schmitt nand based flipflop. This is my favorite because of studying designs in Elektor Electronics.

What is the Schmitt then ?, It is better to visit the links below to learn. It can make a sine or triangle or any shape waveform to square. It can help square a very messy waveform.
    Two nand gates are connected to form a flip-flop toggle switch. When 555 gives out a pulse, the pulse is delayed by a R-C which results in a ramp, the third nand-Schmitt gives out delayed low trigger to toggle nand-flipflop-switch. The Nand-toggle-switch is rest at any time with the lower pushbutton. The fourth nand output gate is not really required. But the 4093 is quad nand, so unused nand inputs should not float , pull-up or pull-down. So it has just been added in circuit so that he can fit some role, or else he will be bored.

    Monday, August 05, 2019

    Learn About Electronics - Eric Coates

    Many pages, illustrations and Interactive demonstrations in Electronics. A new section on AC electronics, designed to teach the basics of AC Theory in 10 easy to learn modules. Individual topics too like capacitors, inductors, reactance, impedance, etc.

    Learn About Electronics - Eric Coates
     
    The Step-by-Step Lessons in Electricity and Magnetism is very simple and full of nice Explaining Pictures. This will work up your appetite to learn more about the Physics and Chemistry in Electronics.

    Learn About Electronics - Eric Coates
      Eric Coates has 26 year practical career in electronics, and 17 years as a lecturer in vocational colleges in the UK.

      Learning about electronics? Here you will find full and easy explanations of how components and circuits really work; animations to make transistor operation clear and stuff you need to know about digital electronics

      Hysteresis - Charles Proteus Steinmetz

      He was an American Mathematician and Electrical Engineer. He fostered the development of alternating current that made possible the expansion of the electric power industry in the United States, formulating mathematical theories for engineers.

      Charles Proteus Steinmetz
      (April 9, 1865 - October 26, 1923)

      Charles Proteus Steinmetz

      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."

      Thursday, August 01, 2019

      TinyCAD - Open-Source Schematic Capture

      TinyCAD is a program to help you draw circuit diagrams. It comes complete with symbol libraries to get you started straight away.

      TinyCAD - Open-Source Schematic Capture

      TinyCAD - Open-Source Schematic Capture

       Features to make it easier for you to put your circuit diagrams on your own web-site or adding them to your Word or other documents. TinyCAD supports outputing ciruits diagrams as PNG files.

      Can be used to make circuit diagrams that can be fed in to a PCB layout program. You can export from TinyCAD in Protel, PADS, Eagle SCR format. You can also use TinyCAD to create Spice simulation files.

      Saturday, July 06, 2019

      DIY Electronics Section of Beis.de

      Here you will find Audio Oriented projects, many in the German Language. There is one - Converting Analog into Digital (IIR) Filters which is useful for Mixed Design students. Then there is a FPGA-Based Digital Audio Peak Level and Correlation Meter with many features. The Hi-Fi Audiophile will like the Tools - Audio Preamplifier, Weighting Filter Set and Universal Filter.

      DIY Electronics Section of Beis.de

       DA2USB - Digital Audio to USB Interface

      DA2USB - Digital Audio to USB Interface

      The DA2USB is a USB interface for connecting digital audio sources (S/PDIF or Toslink, with adapters also AES3) to a PC. It comes without proprietary drivers, i. e., there is no software to install and there is no threat that the hardware sometime will become obsolete waste because the manufacturer does not support it any more with up-to-date drivers (like my fine and expensive sound card did).