Electronics design ideas 2019

Innovation is critical in today’s engineering world and it demands technical knowledge and the highest level of creativity. Seeing compact articles that solve design problems or display innovative ways to accomplish design tasks can help to fuel your electronics creativity.

You can find many very circuit ideas at ePanorama.net circuits page.

In addition to this links to interesting electronics design related articles worth to check out can be posted to the comments section.

 

 

 

 

1,815 Comments

  1. Tomi Engdahl says:

    Don’t Rule Out the Neon Bulb as an AC Power-On Indicator
    https://www.digikey.com/en/blog/dont-rule-out-the-neon-bulb-as-an-ac-power-on-indicator

    The reality is that adding an “AC live” subcircuit using LEDs is not as easy in practice as it may appear “on paper.”

    Go back to the future with neon lamps
    Fortunately, there is a time-tested and highly reliable solution: use a small neon bulb and a current-limiting resistor (Figure 3) which can be connected directly to the AC line (120 or 240 volts AC (VAC)). While this circuit must also be properly insulated, it’s so simple and small that it can be covered in heat shrink tubing or similarly insulated.

    Neon bulbs – more properly called lamps since that is their function – have been around since the early 1900s and come in a variety of sizes and styles. The most common size in general use for indicators by far is generically known as the NE-2 lamp. A good example is the Interlight 4PAK:WX-EGA2-0. It measures 12 millimeters (mm) long and 5 mm in diameter (Figure 4).

    Reply
  2. Tomi Engdahl says:

    There are many cases where an old technology can still be a legitimate or even the best solution to modern design challenges. While LED indicators have largely obsoleted neon for low-voltage solutions, neon lamps are still a very simple and viable option for AC-line indication.

    Reply
  3. Tomi says:

    https://etn.fi/index.php/tekniset-artikkelit/15725-piikarbidi-vaatii-paljon-ohjaukselta

    Reply
  4. Tomi Engdahl says:

    https://article.murata.com/en-us/article/basics-of-noise-countermeasures-lesson-12?fbclid=IwAR0JSG2skAFnM0Z5PzMbCvLFdqgJz8G7yLvMTvV1tm1eCpSVt0edd7En1OM

    Reply
  5. Tomi Engdahl says:

    https://www.gadgetronicx.com/bfo-metal-detector/

    Reply
  6. Tomi Engdahl says:

    https://philipmcgaw.com/capacitors/

    Reply
  7. Tomi Engdahl says:

    https://www.macrofab.com/blog/improve-heat-dissipation-compact-pcba-designs/

    Reply
  8. Tomi Engdahl says:

    https://www.edn.com/power-an-led-driver-using-off-the-shelf-components/

    Reply
  9. Tomi Engdahl says:

    https://bluemoonshine.fun/Project-AudioSpectrumAnalyzer.php?fbclid=IwAR3nqAtVBj9Er2F-btJMFnI4IE7t9hHml6RypqKxljO0wnslV5UyYZMX4ww

    Reply
  10. Tomi Engdahl says:

    RF Current Measurements Made Easy: An Oscilloscope Current Probe for RF
    https://www.elektormagazine.com/articles/oscilloscope-current-probe-for-rf-1?fbclid=IwAR0rjLS9n7hGXM5ee3RSHHyotX50P4NlSzQpRmybueYwXJ1dRJwopmKLU2c

    Reply
  11. Tomi Engdahl says:

    https://www.cui.com/blog/insulation-isolation-and-working-voltage

    Reply
  12. Tomi Engdahl says:

    https://hackaday.io/project/194774-opamp-building-blocks

    Reply
  13. Tomi Engdahl says:

    https://hackaday.com/2024/02/23/op-amp-drag-race-turns-out-poorly-for-741/

    Reply
  14. Tomi Engdahl says:

    https://hackaday.com/2024/03/12/design-review-dpi-lvds-sony-vaio-lcd-devboard/

    Reply
  15. Tomi Engdahl says:

    What are the applications of bipolar transistors (bipolar junction transistors: BJTs) ?
    https://toshiba.semicon-storage.com/eu/semiconductor/knowledge/faq/mosfet_bipoler-transistors/what-is-the-function-of-bjts.html

    In recent years, MOSFETs have been used more often than bipolar-junction transistors (BJTs). This is because MOSFETs generally require no drive current and are easy to handle. However, BJTs are used in amplifiers, oscillators, switching at low voltages, etc.
    This is because the BJT has higher gain (hFE)*, better linearity, better 1/f noise, and can be turned on by applying a voltage of about 0.7 V between the base and emitter. In addition, BJTs are sometimes used in environments with large disturbances due to their high resistance to static electricity (ESD).

    An example circuit using BJTs is shown below.

    Reply
  16. Tomi Engdahl says:

    https://electronics.stackexchange.com/questions/48462/optocoupler-with-phototransistor-base-lead

    Reply
  17. Tomi Engdahl says:

    https://spectrum.ieee.org/frequency-comb-for-ultraprecise-timing

    Reply
  18. Tomi Engdahl says:

    https://powersupply.blogs.keysight.com/2015/03/big-resistors-needed-for-high-power.html

    Reply
  19. Tomi Engdahl says:

    Comparative Study of Permanent Magnet, Conventional, and Advanced Induction Machines for Traction Applications
    https://www.mdpi.com/2032-6653/13/8/137?utm_campaign=journnews_ccbj_wevj&utm_medium=social_journ&utm_source=facebook&fbclid=IwAR2FP28Zrlig0SfsFgdRJ1lgj2YoW1Yy-Zl6SufEJeMBkp9ViKaglLoJFiU

    Reply
  20. Tomi Engdahl says:

    https://etn.fi/index.php/tekniset-artikkelit/16013-taemaen-takia-siirrymme-integroituihin-virta-antureihin

    Reply
  21. Tomi Engdahl says:

    https://electronics.stackexchange.com/questions/475489/bi-directional-level-shifter-1-8-5-v-3-3-v

    https://electronics.stackexchange.com/questions/617004/unidirectional-level-shifter-1-8-5v-3-3v

    Reply
  22. Tomi Engdahl says:

    Server power to Universal power supply
    https://m.youtube.com/watch?si=pF4uOOdAs3RDCLWO&fbclid=IwAR238wDAfa92lPIxt36XP2nSzF79eRTXFwq4qW3LpXi72_HoSTdHVg5BFHw&v=V4-azirqbco&feature=youtu.be

    Reply
  23. Tomi Engdahl says:

    #1818 Current Source from HP34401 Explained
    https://www.youtube.com/watch?v=PgF7NkjIkUQ

    Reply
  24. Tomi Engdahl says:

    https://resources.altium.com/p/how-use-class-x-and-class-y-safety-capacitors?fbclid=IwAR1Z-JW05ZzBfJqiFNYsylBolYvoXU_Su2X0oRXCnp9aupFArOYqShawo3c

    Reply
  25. Tomi Engdahl says:

    https://www.petervis.com/Education/741_Pin_Compatible_Equivalent_Op_Amps/741_Pin_Compatible_Equivalent_Op_Amps.html

    Reply
  26. Tomi Engdahl says:

    https://avdweb.nl/tech-tips/electronics/four-quadrants-mosfet-graph

    Reply
  27. Tomi Engdahl says:

    https://kritiikkiblogi.wordpress.com/business/alkaliparistolaturi/

    Reply
  28. Tomi Engdahl says:

    https://www.arrow.com/en/research-and-events/articles/using-a-level-shifter-to-integrate-different-voltage-signals

    https://www.sparkfun.com/products/12009

    https://www.digikey.fi/en/blog/logic-level-shifting-basics

    https://www.instructables.com/A-Quick-Guide-on-Logic-Level-Shifting/#amp_tf=L%C3%A4hde%3A%20%251%24s&aoh=17144273892382&referrer=https%3A%2F%2Fwww.google.com&ampshare=https%3A%2F%2Fwww.instructables.com%2FA-Quick-Guide-on-Logic-Level-Shifting%2F

    Reply
  29. Tomi Engdahl says:

    https://philipmcgaw.com/reducing-ripple-on-dc-lines/

    Reply
  30. Tomi Engdahl says:

    https://www.4pcb.com/blog/navigating-the-ever-changing-world-of-pcb-manufacturing-what-designers-and-engineers-need-to-know/

    Reply
  31. Tomi Engdahl says:

    Ilmainen oppikirja EMC-suunnittelusta https://link.springer.com/book/10.1007/978-3-031-14186-7?fbclid=IwZXh0bgNhZW0CMTAAAR1v0kgAgwONkCEuP31pjM3GNwcA0MiunR8H7iauxndYKlaRmlvbccynfDw_aem_Af6Jw2u-ZA8gLJR-ghAYRFWTnBdSVeVwEILLEGKC1HbrNFzfZmnUOtMfPQ2T_pk2gPpXtaQ1P87-B5tmCHMejf5j

    Reply
  32. Tomi Engdahl says:

    #1855 BSS138 Logic Level Translation
    https://www.youtube.com/watch?v=hvf990VPiRg

    Reply
  33. Tomi Engdahl says:

    6 Simple Class A Amplifier Circuits Explained
    https://www.homemade-circuits.com/single-mosfet-class-power-amplifier/

    Reply
  34. Tomi Engdahl says:

    HOW TO BUILD A SAWTOOTH AND TRIANGLE WAVE GENERATOR
    https://www.circuitbasics.com/what-are-sawtooth-and-triangle-wave-generators/

    Reply
  35. Tomi Engdahl says:

    https://www.talkingelectronics.com/projects/Transistor%20Tester/TransistorTester.html
    https://www.circuits-diy.com/simple-transistor-tester-circuit/#google_vignette

    Reply
  36. Tomi Engdahl says:

    All good and well, but alot of these are actually designed to be press fitted and not soldered after

    “According to the IEC1709 norm, press-fit connections are at least 10 times more reliable than soldered connections,” claims Glenn Nausley, president of Promess Inc. “By using press-fit instead of solder, manufacturers eliminate thermal stress on the board, heat development on sensitive components, cold solder joints and shorts caused by solder bridging.”

    Reply
  37. Tomi Engdahl says:

    https://hackaday.com/2024/05/15/introduction-to-mosfet-switching-losses/

    Reply
  38. Tomi Engdahl says:

    https://etn.fi/index.php/tekniset-artikkelit/16240-optisesta-analyysistae-kattavaan-aistimiseen

    Reply
  39. Tomi Engdahl says:

    For those interested in learning more about electronics, there’s a book available in PDF form online, titled “The Art of Electronics” by Horowitz and Hill. Older versions may be available at little or no cost, but the material is still good.
    It’s a great source of ideas and discussions about the theory behind each circuit.

    Reply
  40. Tomi Engdahl says:

    https://hackaday.com/2024/06/10/switching-regulator-layout-for-dummies/

    Reply
  41. Tomi Engdahl says:

    https://blog.adafruit.com/2024/06/07/a-nanoammeter/

    Reply
  42. Tomi Engdahl says:

    https://www.elektormagazine.com/news/circuit-diy-wideband-rf-signal-tracer

    Reply
  43. Tomi Engdahl says:

    Zener diodes as protection clippers
    https://www.diyaudio.com/community/threads/zener-diodes-as-protection-clippers.257504/

    Someone recently asked how much distortion might be introduced by using a couple of zeners as voltage limiting elements at the output of a preamp. Since this isn’t something that can be guessed at from an armchair, everyone went very quiet. I was interested to know the answer, so I did a few measurements using some ordinary 10V and 16V zeners. There’s nothing special about the zeners (BZX79Cxx). I just chose them because I had them to hand, and they seemed like suitable values that might be used to protect downstream solid-state equipment.

    Here you can see distortion versus level at 1kHz (measurement bandwidth <10Hz-80kHz, 100k load resistance). The rise below 1Vrms is purely noise added by the series resistor. Above this distortion rises, but is lower than most valve distortion up until the clipping point. I was actually surprised at how well the clipping point is defined.

    Reply
  44. Tomi Engdahl says:

    https://www.macrofab.com/blog/why-pcba-design-reuse-is-becoming-more-common/

    Reply
  45. Tomi Engdahl says:

    https://hackaday.com/2024/07/03/usb-and-the-myth-of-500-milliamps/

    Reply
  46. Tomi Engdahl says:

    https://hackaday.com/2024/07/02/usb-pd-on-ch32v003-teaches-you-everything/

    Reply
  47. Tomi Engdahl says:

    https://www.edn.com/sneak-diodes-and-their-impact-on-your-designs/#google_vignette

    Reply
  48. Tomi Engdahl says:

    https://www.edn.com/use-a-heated-diode-as-a-flow-sensor/

    This Design Idea describes a method by which you can detect and assess air or liquid fluid flow using an externally heated semiconductor diode. Airflow across the heated diode reduces its temperature, causing a variation in the diode’s voltage drop. This principle is similar to that used in hot-wire anemometers.

    Reply
  49. Tomi Engdahl says:

    Overcoming Common Pitfalls in High-Frequency PCB Design
    https://www.advancedpcb.com/en-us/blog/overcoming-common-pitfalls-in-high-frequency-pcb-design/

    Reply
  50. Tomi Engdahl says:

    https://hackaday.com/2024/08/23/a-simple-guide-to-rf-pcb-design/

    Reply

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