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Dhananjay V. Gadre

Dhananjay V. Gadre is an assistant professor at Netaji Subhas Institute of Technology, New Delhi, India. He completed his MSc (electronic science) from the the University of Delhi, India, and his MEngr (computer engineering) from the University of Idaho, Pocatello.


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Author Articles

  • Contact-Less Tachometer Boasts Graphics LCD Readout

    By Gaurav Minocha, September 09, 2010

    A pulse-counting circuit that drives an LCD display is described in detail.

  • Improved Electronic Birthday Candles Provide Better "Blow Out" Simulation

    By Dhananjay V. Gadre, October 08, 2009

    An earlier Idea for Design described LED “candles” that you could blow out just like normal birthday candles. This update provides a better "blow-out" simulation and increases the maximum number of candles to 20. Happy birthday to you...

  • Inexpensive MCU Replaces Dedicated Backup-Power Controller

    By Ashish Aggarwal, February 14, 2008

    Portable battery-powered applications sometimes also permit operation from the power grid. If so, the application must choose the appropriate available power source—the grid or the battery. If the battery is rechargeable, the system also requi

  • Eight-Pin Microcontroller Handles Two-Digit Display With Multiple LEDs

    By Anurag Chugh, May 24, 2007

    Eight-pin microcontrollers offer numerous peripheral features. However, the maximum number of I/O pins available is often limited to six, since two pins would be required for the chip's power supply. So, it can be challenging to design systems based

  • RISC Controller Backs Frequency Counter

    By Dhananjay V. Gadre, December 09, 2002

    Frequency measurement, often vital to design engineers, is the driving force behind this idea. Here, an AVR RISC controller-based circuit can measure the frequency of digital signals. It employs the PC as a user interface and sends the measurement...

  • Optical-Fiber Link Switches Multiple RS-232 Ports

    By Dhananjay V. Gadre, September 18, 2000

    A recent application required a switch that would allow multiple RS-232 serial data links to share a single physical link. This switch was necessary to reduce the cabling between the instruments on the focal plane of our upcoming 2-m optical...

  • Roll Your Own Electronic Lock

    By Dhananjay V. Gadre, February 07, 2000

    Electronic security locks, popularly known as “dongles,” are commonly used to deter software piracy. This idea describes a simple yet-powerful design of such a security lock using the linear feedback shift register (LFSR) principle. The lock, which is...