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Projects from Roel Arits

  • Energy saving solid-state feet warmer
    Published in Elektor

    Energy saving solid-state feet warmer

    by Roel Arits
    Roel Arits
    In these times of extreme high energy prices (nov 2022), people are fo...
    11.4k 3
  • Where did i go wrong !?

    Where did i go wrong !?

    by Roel Arits
    Roel Arits
    The following is a collection of mistakes, misunderstandings, wrong as...
    22.2k 14
  • Adjustable high voltage low-power supply : 100V to 500V

    Adjustable high voltage low-power supply : 100V to 500V

    by Roel Arits
    Roel Arits
    Build a high voltage power supply with load regulation and current lim...
    13.8k 12
  • PUT-ting it all together.
    Published in Elektor

    PUT-ting it all together.

    by Roel Arits
    Roel Arits
    A circuit collection of what you can do with a transistor combination...
    15.1k 6
  • Remote sensing with connection loss detection using nRF24L01+ modules

    Remote sensing with connection loss detection using nRF24L01+ modules

    by Roel Arits
    Roel Arits
    When using 2-way communication between 2 RF modules, it is very useful...
    12.1k 4
  • Dangerous Jingle Bells at 30kV

    Dangerous Jingle Bells at 30kV

    by Roel Arits
    Roel Arits
    Christmas sparkling Jingle Bells using high voltage flyback transforme...
    6.2k 0
  • Long range IR beam break detector

    Long range IR beam break detector

    by Roel Arits
    Roel Arits
    Analogue long range infrared beam break detector using an 38 kHz IR re...
    30.1k 17
  • Arduino RGB color stroboscope

    Arduino RGB color stroboscope

    by Roel Arits
    Roel Arits
    Why don't we turn something useful like a stroboscope into something u...
    15.6k 2
  • LED gravity balance

    LED gravity balance

    by Roel Arits
    Roel Arits
    LED's and gravity ?? Sure ! In this project you will see how you can...
    15.4k 4
  • Cat repeller

    Cat repeller

    by Roel Arits
    Roel Arits
    How to chase away the cat of your neighbours that uses your garden as...
    19.7k 5
  • Arduino Jingle Bells tune player

    Arduino Jingle Bells tune player

    by Roel Arits
    Roel Arits
    Play the "Jingle Bells" or the "Mission Impossible" tune using one dig...
    6.9k 0
  • Versatile LED flasher

    Versatile LED flasher

    by Roel Arits
    Roel Arits
    There are dozens of LED flasher designs on the web. But this design...
    5.2k 0
  • Mechanical LED fader

    Mechanical LED fader

    by Roel Arits
    Roel Arits
    I wanted to end my diarrhea of LED fader designs with a humoristic des...
    15.6k 2
  • Linear analogue LED fader using synthetic inductor

    Linear analogue LED fader using synthetic inductor

    by Roel Arits
    Roel Arits
    YALALF Yet Another Linear Analogue LED Fader Inspired by the idea of...
    6.2k 4
  • Magic colour changing lamp w/ wireless power and capacitive sensor

    Magic colour changing lamp w/ wireless power and capacitive sensor

    by Roel Arits
    Roel Arits
    What do you get when you combine a capacitive sensor, wireless power t...
    5.1k 0
  • Sinusoidal LED fader using Twin-T oscillator

    Sinusoidal LED fader using Twin-T oscillator

    by Roel Arits
    Roel Arits
    Using a Twin-T sine oscillator to generate a non-linear, but still pre...
    8.0k 2
  • Analogue LED fader/dimmer with linear brightness curve.

    Analogue LED fader/dimmer with linear brightness curve.

    by Roel Arits
    Roel Arits
    Use the FET square law to linearize the brightness of a LED, so a line...
    5.8k 1
  • Analogue alternating linear LED fader using 2 different approaches
    Published in Elektor

    Analogue alternating linear LED fader using 2 different approaches

    by Roel Arits
    Roel Arits
    LEDs and closed loop brightness control ? Or using 'ancient' technique...
    18.0k 18

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