dapj Gadgets - Interactive Electronic Tutorials

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

Jot-A-Note also supports HTML inside notes. That means you can have Simple HTML and CSS formatting. Images and br-gadgets. Jot a Note is now Jot Desktop .. Almost - I am at Google Plus Too - delabs Plus

There is a Golden SteamPunk Clock too built in. If you want it seperately in your iGoogle Get Golden Clock.

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 Equation and Result History.

I have also made a SteamPunk Clock which is integrated into Jot a Note Gadget. This calculator also will soon be a app in the Jot Notes. Jot Desktop in the clouds, not yet, but dreaming with gadgets.

Google Gears is mutated to HTML5, the Jot a Note i made was on Gears and SQL, Now i have to learn HTML5 apps, also all browsers should start supporting the database part of HTML5. So i converted the Jot a Note Gadget to plain JS and Cookies.

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 Zeners at output to protect Output from being zapped by over-voltages or high energy - voltage or frequency transients. Add plastic capacitors across Rf for damping AC operation or ripple. Also avoid floating inputs by providing a bias, till you connect it to a sensor; or you will see electrometer like effects.