dapj gadgets

These are Gadgets i HandCrafted for iGoogle. Add them to your Webpage or Blog. There are Web widgets related to learning electronics and also demonstrating the subtle aspects of Product Design Technologies.

This blog also has the widgets made by delabs from the iGoogle days, around 2005. These demonstrate solutions for improving usability in devices.


These are various web widgets i developed a decade ago. These were tutorials in Electronics and Technology. It also demonstrates usability issues in small devices and using JS-CSS-Ajax in a Innovative way to make GUI dynamic, interactive and contextual. Some of the Ideas were the first of its kind in the GUI design.

dapj Gadgets

Digital and Analog Clocks

• Flight Clock - An Aircraft Cockpit Dashboard clock simulation.
  
• Digital Clock - Digital Seven Segment Clock with Week Number.
  
• Hourglass Clock - Dynamic Indication of Time elapsed or used.
  
• Analog Bargraph Clock - Colorful Bar Graph of Time in Progress.

The above clocks use your PC clock for time data. Keep your PC clock updated.

Toys and Games

• Dual Digital Dice - Random Dice with Digital Readout, Quick Results.
  
• Electronic Toss - Random but Reliable Tri State results, Yes, No and Po.
  
• Audio Visual Metronome - Select Instrument, Tempo and Replay Sequence.
  

Electronic Gadget Simulation

• Programmable Digital Timer -  Digital Count-up Timer, with Preset Alarm.
  
• Digital Alarm Clock -  Alarms setting with Electronic Gadget like controls.
• Eco Green Alarm Clock - Alarm Clock with SM2 Flash for Sound.
  

Digital Electronics Tutors

• Astable 555 Timer Flasher - 555 Blinks Two LED Lamps, Vary Part Values.
  
• LED Running lights CD4017 - Speed up a 555 Clock driving a LED Chain.
  
• Digital up down BCD counter - Flip-Flop, Binary Numbers, Logic Demo.
  
• Digital Logic Gates - Logic Gates with LED Lamps and Pushbutton Switches.

Analog Electronics Tutorials

• Inverting Amplifier - Op-Amp Circuits
• Non-Inverting Amplifier - Op-Amp Circuits
• Buffer or Unity Gain Op-Amp
• Differential Amplifier - Op-Amp Circuits
• Two Op-Amp Differential Amplifier
• 3 Op-Amp Differential Instrumentation Amp
• Virtual Oscilloscope

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Beta Bugs

Some gadgets were made to demonstrate some electronic concepts, There may be known and unknown bugs in my code.

Known Bugs