1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

Articles from Val Gretchev

  1. Val Gretchev

    Vacuum Tube Power Supply

    A stand-alone power supply for use with vacuum tube amplifiers, radios, and test equipment.
    0/5, 0 votes
    Updated:
    Aug 26, 2015
  2. Val Gretchev

    8-Digit Numeric LED Display

    A display driver module for 8 digits with only 9 lines.
    0/5, 0 votes
    Updated:
    Jul 9, 2015
  3. Val Gretchev

    Servo Motor Controller

    How to implement a servo motor controller using an inexpensive microcontroller board.
    0/5, 0 votes
    Updated:
    Apr 27, 2015
  4. Val Gretchev

    Designing a Microprocessor from Scratch

    This article shows how you can design and simulate a microprocessor using simple gates.
    0/5, 0 votes
    Updated:
    May 27, 2014
  5. Val Gretchev

    Unravelling the RS-232 standard.

    The new specification defines a symmetrical hardware handshaking method by just changing RTS.
    0/5, 0 votes
    Updated:
    Apr 8, 2014
  6. Val Gretchev

    Constant Current Diode

    A component that is often overlooked.
    0/5, 0 votes
    Updated:
    Apr 3, 2014
  7. Val Gretchev

    Obscure but Interesting Circuits

    Having fun with logic gate circuits that may be useful.
    0/5, 0 votes
    Updated:
    Apr 1, 2014
  8. Val Gretchev

    Another Vehicle Loop Detector Circuit

    Detection of large metal objects (cars) by inductive loop sensors.
    0/5, 0 votes
    Updated:
    Jan 12, 2014
  9. Val Gretchev

    Constant Current Supply for High Power LEDs

    A high efficiency constant current supply based on a switching regulator.
    0/5, 0 votes
    Updated:
    Jan 11, 2014
  10. Val Gretchev

    Transducers

    This article doesn't fit well in any of the categories since it's more philosophical than practical.
    0/5, 0 votes
    Updated:
    Jan 8, 2014
  11. Val Gretchev

    Examples for STM32

    Examples to get you started with MikroElektronika MINI-M4 for STM32 development board.
    0/5, 0 votes
    Updated:
    Jan 4, 2014