dapj Gadgets - Interactive Electronic Tutorials

Jot-a-Note changed added Widgets

2011-10-12T12:22:00.000+05:30

The Gadget Jot-a-Note which was on Google Gears has been modified for Cookies Data Storage. Now it has Sticky Notes, Clock and Calculator. Online Desktop. Just break Frames and do a Full Screen on chrome. Jot-a-Note for your iGoogle or Blog From dapj Gadgets - Interactive Electronic Tutorials Jot-A-Note also supports HTML inside notes. That means you can have Simple HTML and CSS formatting. Images and iframe-gadgets. Jot a Note is now Jot Desktop .. Almost - I am at Google Plus Too -...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Ostermiller Basic and Scientific Calculator

2011-07-23T20:55:00.001+05:30

Scientific Expression or Formula Calculations. Twenty Transaction Memory and Tape, Different bases like Decimal and Octal, Logic Math, Functions, Constants. Get Ostermiller Calculator Deriving knowledge and inspiration from ostermiller.org. The GUI and Skin Modifications were done by me. The Code is here digital-calculator It has Brackets to build your own math equation. Scientific Functions like Trigonometric, Hyperbolic, Logarithmic.Memory (cookies), A Paper Trail or Tape for...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Instrumentation Amp - Op-Amp Designs

2010-11-06T08:39:00.001+05:30

This is the best Instrumentation OpAmp, Great CMRR, ensure supply has no ripple and keep analog and digital grounds separate. Ri can be replaced with a trimpot and resistor to alter gain. Connect a preset ends to pins 1 and 8 and preset wiper to VCC for Offset Null when high gains are configured. Instrumentation Amp - Op-Amp Designs The Input zeners and diodes form a protective clamp for all voltages above VCC-VDD. If supply is changed to +12 -12 change zeners to 12V zeners. Use similar...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Dual Differential Amp - Op-Amp Designs

2010-11-05T13:16:00.000+05:30

The Input Impedance of this module is very high and is symmetric. This circuit can be used for strain gauges and for four wire measurements. If inputs are in mV use OP07. The merit is that it uses only 2 OpAmps yet has high differential Input Impedance. Dual Differential Amp - Op-Amp Designs The Outputs of Opamps are low impedance but still have limits they cannot drive more than a few mA of Current into the Load. If low ohmic value loads are to be applied use external transistors as...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Differential Amplifier - Op-Amp Designs

2010-11-01T14:26:00.000+05:30

A very simple one op-amp diff amp. This amplifies the difference between two inputs Vp and Vn the low impedance of this configuration is a drawback, but can be used in analog computing. Optimum VCC VDD can be +12/-12. AC signals common to Vp and Vn are canceled by this configuration. Differential Amplifier - Op-Amp Designs Use a capacitor like 10nF plastic from pin 2 to 3 or across R2 to make circuit stable. For AC applications use LF351 TLO71 as they have good slew rate and also are FET...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Non Inverting Amplifier - Op-Amp Designs

2010-10-18T12:40:00.001+05:30

The input impedance of this module is very high, if U1 is OP07 it is in mega/giga ohms, use CA3140 or LF356 fet input opamps to get 1 tera ohm input impedance, but for high gains OP07 is better as it is ultra low offset. This is a good amplifier for sensor outputs, as it is a DC Circuit. Non Inverting Amplifier - Op-Amp Designs The zener diodes protect the opamp inputs, R1 limits current during high voltage inputs and R1 and C1 form a filter to remove some ac components, C1 should be a...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Inverting Amplifier - Op-Amp Designs

2010-10-18T08:15:00.000+05:30

This is an Op-Amp Tutorial. Here you see an Operational Amplifier in the Inverting Amp configuration. I have used OP07 as it is almost like an ideal Opamp. The ultra low offset is the best part. Then not really, CA3140 has a Tera Ohm Input resistance but offset not the best. ICL7650 approaches an Ideal Op-Amp and chopper stabilized. These parameters are good for DC Amps. Sensors, Strain Gauge Bridges Signal Conditioning need them. Then when you want a better AC performance, you can use a LF353...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Buffer Unity Gain Amp - Op-Amp Designs

2010-10-17T17:15:00.000+05:30

If output impedance of a point is a high value then connecting another circuit at that point will load it, resulting in malfunction or error. Buffers are used as interface between circuits. Low impedance of an output means it can source/sink lot of current, when you need 2 opamps use LF353 or TL072 which are dual opamps. Buffer Unity Gain Amp - Op-Amp Designs A non-inv FET input is the best buffer, for inverting buffer use high R values. Using very high R values like 2.2M or higher requires a...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

TI - Widgets Toolbox - Texas Instruments

2010-09-21T08:28:00.000+05:30

Use this widget to calculate Vrms to dBV, Vrms to dBref, dBV to RMS, dBref to RMS, SNR, Gain, R, C to 3 dB point, Maximum Power Output. Useful engineering calculator. TI - Widgets Toolbox - Texas Instruments This post was created by dapj Web

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Maths-Whizz Scientific Calculator

2010-09-20T23:47:00.000+05:30

Convert fractions, calculate areas of circles, perform trigonometry and type out fancy equations. Maths-Whizz Scientific Calculator This post was created by dapj Web

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

eCalc - Online Scientific Calculator

2010-09-20T20:44:00.001+05:30

eCalc is an easy to use scientific calculator that supports many advanced features including unit conversion, equation solving, and even complex-number math. eCalc - Online Scientific Calculator Scientific functions, memory, percent, engineering exponent, and keyboard support. eCalc's online scientific calculator has even more features (unit conversion, equation solving, RPN, fractions, etc). This post was created by dapj Web

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Scientific Calculator Tab - Marek Kyncl

2010-09-20T19:40:00.000+05:30

A scientific calculator with extended memory function. It follows the standard order of operations. Scientific Calculator Tab - Marek Kyncl For entering numbers and basic operators, you can also use your keyboard. In a addition to the basic arithmetical functions, the following funcions are included: toggle positive/negative, brackets, percentages, root, square root, square, exponent, sine, arcsine, cosine, arcsosine, tangent, arctangent, logarithm, natural logarithm, reciprocal, e, pi,...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Virtual Oscilloscope - Visualize Equations

2010-05-11T13:15:00.000+05:30

Oscilloscope Functions and Fourier Series. Periodic Waveforms. Watch Sine, Square, Triangle and Sawtooth Waves and Study Controls. This Scope is a Real Time Graph of Volts Y and Time X at any node of a circuit. It can show both AC and DC. Load an equation of your own and see it as a waveform on this web scope. Paste a Formula in the Equation text box, load it, it will be rendered as waveform on scope. Learn from this page .... Virtual Oscilloscope - Visualize Equations Get The JS...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

EE Tutors with iGoogle Gadgets

2010-04-23T15:33:00.000+05:30

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. Op-Amp Simulation using Javascript Inverting Amplifier Gadget - Get Inverting Op-Amp Tutorial Non-Inverting Opamp Gadget - Get Non-Inverting Op-Amp Tutorial Buffer Unity Gain Amp - Get Buffer Unity Gain Op-Amp Tutorial Dual Differential Amp - Get Dual Differential Amp...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Eco Green Digital Alarm Clock

2010-03-15T08:35:00.000+05:30

This is an upgrade of the digital-alarm-clock gadget which used embed for sound. In this version it uses SoundManager 2. The older version remains intact. You can set Five Alarms with Ten Selectable Musical Sounds and a small Text memo. Digital Alarm Clock Web Gadget with Musical Alarms. This is an Alarm Clock Simulation, Eco Green is to inspire saving energy and keeping earth Green, Clean and last longer. This is an experimental gadget, usable but not easy. This gadget can demonstrate how...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Jot-a-Note using Google Gears and Canvas

2010-03-02T08:15:00.000+05:30

This is a port of my Pin Note Gadget for iGoogle or Blog. This gadget uses the Google Gears local database to store the notes. It works in New Versions of FF, IE and Chrome with Gears installed as Plugin. This also has the Canvas or Large Size View from Opensocial. Try it on iGoogle. Jot a Note, Tiny Memo Pad, Write Memos, Reminders or Notes. Get the Jot-a-Note for your iGoogle or Blog From Buzz Images See a demo in Google sites Canvas View Jot-a-Note Gadget For closer examination...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Preset Digital BCD Counter

2008-11-13T06:34:00.000+05:30

See a Tutor Digital up down BCD counter that will help you take the first step in digital electronics. xml- o - Add to Webpage - o - Realted Resources The 4029 CMOS Counter IC hyperphysics - binary counter 7 Segment LED Counter This post was created by dapj Web

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

LED Running lights CD4017

2008-11-12T05:45:00.000+05:30

This is a Gadget Tutorial for this Article LED Running lights CD4017. This Demo shows LM555 running a CD4017 Counter to drive Ten Leds sequentially. xml - o - Add to Webpage - o - Related Resources - LED (Light Emitting Diodes) Circuits White LED Drive Circuit Back and Forth Flasher Sequential 10-LED Flasher Fun with LEDs Optoelectronic circuits, LED circuits FC's Solar Circuits This post was created by dapj Web

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Astable Multivibrator with 555

2008-11-11T09:14:00.000+05:30

Astable Multivibrator with 555 or Astable 555 Timer Flasher This is a tutorial with calculator to help learn the application of 555 which is a very rare chip innovation. It is simple, versatile, flexible and programmable (by tweaking of pots). xml - o - Add to Webpage - o - If you are starting with electronics, this is the first step. So do it now ! Do-It-Yourself. 555 Timer Tutorials 555 Timer/Oscillator Tutorial 555 Timer Calculator 555 and 556 Timer Circuits LM555 Timer...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Electronic Random Decision Maker

2008-06-14T09:30:00.000+05:30

Running LED, Random Results, Decade Counter and Clock. Weigh the Pros-n-Cons, Take a Balanced Decision. See Code gadgets-widgets. This can be built with one 555 timer and a CD4017. See Fun with LEDs but use the pin 5 to connect to a cap you charge with a pushbutton or gate like CD4093 to turn off 555 using pin 4 after a cap discharges. This may simulate a random. Add to Webpage This post was created by dapj Web

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Electronic organ and Metronome

2008-04-15T16:54:00.001+05:30

An electronic organ is an electronic keyboard instrument originally designed to imitate the sound of a pipe organ. It has developed today into two forms of the instrument, the imitation pipe organ as used in churches, and the Hammond organ-style instrument used in more popular music genres. Electronic organ - Wikipedia A metronome is any device that produces a regulated audible and/or visual pulse, usually used to establish a steady beat, or tempo, measured in beats-per-minute (BPM) for the...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Basic Digital Electronics Tutors

2008-03-07T12:44:00.001+05:30

Astable 555 Timer Flasher xml - o - Add to Webpage - o - If you are starting with electronics, this is the first step. So do it now ! Do-It-Yourself. 555 Timer Tutorials 555 Timer/Oscillator Tutorial 555 Timer Calculator 555 and 556 Timer Circuits LM555 Timer Circuits LED Running lights CD4017. xml - o - Add to Webpage - o - Related Resources - LED (Light Emitting Diodes) Circuits White LED Drive Circuit Back and Forth Flasher Sequential 10-LED Flasher Fun with LEDs Optoelectronic...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Digital Dice Cubes

2008-02-04T12:25:00.001+05:30

Digital Die Cube Toy, Click the Dice Cube, Wait, It will Display a Random Result, A random generation for rolling and one for showing value. Electronics Dice gadgets we can build listed below. . Project Page - digital-dice xml -o- -o- Add to Webpage Dice Project PIC Die - PIC Projects Electronic Dice Project Dice Project with PCB Dual Electronic Dice. Build an Electronic Dice Programmable Dice. This post was created by dapj Web

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

RGB Color Mixer Gadget

2008-02-04T06:14:00.001+05:30

This is a HTML RGB color mixer, I was inspired by CPick and RGB Mixer. It helps you get the shade of color you want for a Webpage in HTML Hex Code or for a Program GUI that you are designing in RGB weights. xml - o - Add to Webpage - o - For Children it is fun to play with and understand what Black, Grey, Brown, White are made of and How Cyan-Magenta-Yellow and other Fine Shades can be synthesized by just playing with the three Sliders. color-mixer - Project Page Related...

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.

Analog Bargraph Clock Gadget

2008-02-03T22:47:00.000+05:30

Analog Clock, Linear Display of Time Elapsed using Bargraph, Shows Week Days and Month Days Passed. The WD indicates Complete Week Days passed and MD is Month Days Completed. This is not the date, date is MD+1. This is an example of CSS Animation, that was the Motivation for this clock. xml - o - Add to Webpage - o - Related Resources Analog & Digital propeller Clock Timers and Counters Circuits Microchip PIC Analog Clock This post was created by dapj Web

This post is a snippet, to see the full content visit this blog or http://www.dapj.net/. The blogs are listed at dapj Web.