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.
1,777 Comments
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).
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.
Tomi says:
https://etn.fi/index.php/tekniset-artikkelit/15725-piikarbidi-vaatii-paljon-ohjaukselta
Tomi Engdahl says:
https://article.murata.com/en-us/article/basics-of-noise-countermeasures-lesson-12?fbclid=IwAR0JSG2skAFnM0Z5PzMbCvLFdqgJz8G7yLvMTvV1tm1eCpSVt0edd7En1OM
Tomi Engdahl says:
https://www.gadgetronicx.com/bfo-metal-detector/
Tomi Engdahl says:
https://philipmcgaw.com/capacitors/
Tomi Engdahl says:
https://www.macrofab.com/blog/improve-heat-dissipation-compact-pcba-designs/
Tomi Engdahl says:
https://www.edn.com/power-an-led-driver-using-off-the-shelf-components/
Tomi Engdahl says:
https://bluemoonshine.fun/Project-AudioSpectrumAnalyzer.php?fbclid=IwAR3nqAtVBj9Er2F-btJMFnI4IE7t9hHml6RypqKxljO0wnslV5UyYZMX4ww
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
Tomi Engdahl says:
https://www.cui.com/blog/insulation-isolation-and-working-voltage
Tomi Engdahl says:
https://hackaday.io/project/194774-opamp-building-blocks
Tomi Engdahl says:
https://hackaday.com/2024/02/23/op-amp-drag-race-turns-out-poorly-for-741/
Tomi Engdahl says:
https://hackaday.com/2024/03/12/design-review-dpi-lvds-sony-vaio-lcd-devboard/
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.
Tomi Engdahl says:
https://electronics.stackexchange.com/questions/48462/optocoupler-with-phototransistor-base-lead
Tomi Engdahl says:
https://spectrum.ieee.org/frequency-comb-for-ultraprecise-timing
Tomi Engdahl says:
https://powersupply.blogs.keysight.com/2015/03/big-resistors-needed-for-high-power.html
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
Tomi Engdahl says:
https://etn.fi/index.php/tekniset-artikkelit/16013-taemaen-takia-siirrymme-integroituihin-virta-antureihin
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
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
Tomi Engdahl says:
#1818 Current Source from HP34401 Explained
https://www.youtube.com/watch?v=PgF7NkjIkUQ
Tomi Engdahl says:
https://resources.altium.com/p/how-use-class-x-and-class-y-safety-capacitors?fbclid=IwAR1Z-JW05ZzBfJqiFNYsylBolYvoXU_Su2X0oRXCnp9aupFArOYqShawo3c
Tomi Engdahl says:
https://www.petervis.com/Education/741_Pin_Compatible_Equivalent_Op_Amps/741_Pin_Compatible_Equivalent_Op_Amps.html