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  1. Using a bipolar transistor to turn a load on and off
    For situations when your microcontroller (or whatever) can't do it on its own. - by (*steve*)
    Updated: Jul 6, 2014
  2. Do I need a heatsink? How big?
    A simple inroduction to heatsinking components - by (*steve*)
    Updated: Jul 6, 2014
  3. PCB prototype manufacturing calculator
    Find the least expensive PCP manufacturer for your hobby project - by Harald Kapp
    Updated: Jun 4, 2014
  4. How to take photos of circuit boards
    Hints and tips on how to take optimal photos of your circuit boards - by KrisBlueNZ
    Updated: May 5, 2014
  5. Adding new components to LTSPICE
    add models and subcircuits from other sources - by Harald Kapp
    Updated: May 13, 2014

View All Featured Resources

  1. Got a question about driving LEDs?

    A list of common anwers and links to useful documentation on driving LEDs.
  2. How to take photos of circuit boards

    Hints and tips on how to take optimal photos of your circuit boards
  3. Long duration timers - Notes for beginners

    Tips for beginners on long duration timers.
  4. LTSPICE Shortcuts

    Time-saving Keyboard Shortcuts for LTSpice
  1. Updated:
    Aug 3, 2021
  2. Updated:
    Feb 21, 2021
  3. Updated:
    Feb 21, 2021
  4. Updated:
    Feb 18, 2021
  5. (Old) software at the Internet Archive

    (Old) software at the Internet Archive
    Updated:
    Jan 2, 2021
  6. Updated:
    Nov 10, 2020
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    Oct 10, 2020
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    Aug 7, 2020
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    Aug 7, 2020
  10. Updated:
    Jun 5, 2020
  11. Updated:
    May 20, 2020
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    May 20, 2020
  13. Updated:
    Mar 2, 2020
  14. Micro-Cap 12

    Micro-Cap simulator is now free
    Updated:
    Jan 10, 2020
  15. Selecting a suitable component

    Finding a component that suits your needs at the right price
    Updated:
    Jan 5, 2019
  16. Resistors, Capacitors, Zener diodes... Why the funny values?

    An explanation of the E-series and why those funny values are used.
    Updated:
    Mar 18, 2017
  17. ako: A Kind Of (aliasing components)

    Stepping device parameters or stepping complete device models
    Updated:
    Feb 21, 2017
  18. Simulating time variable resistors

    Simulate time variable resistors in LTSPICE using a voltage source as controller
    Updated:
    Feb 8, 2017
  19. Simulating sawtooth and triangular waveforms

    simulate sawtooth and triangular waveforms in LTSPICE using a PULSE source
    Updated:
    Jun 10, 2016
  20. Power Supplies - Common Terms and Limitations

    What is a power supply (source) and how can I control the voltage and current?
    Updated:
    Feb 23, 2016
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