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Other

https://forum.arduino.cc/t/averaging-a-fluctuating-number-of-sensor-values-over-time/1043838
https://www.arduino.cc/reference/en/libraries/movingavg/
https://www.arduino.cc/reference/en/libraries/simplekalmanfilter/

Projects

• GPS

  https://github.com/jumejume1/Open-smart-GT-7U-GPS
  https://github.com/mikalhart/TinyGPSPlus
  https://manuals.plus/fr/goouuu/goouuu-tech-gt-u7-gps-modules
  https://forum.arduino.cc/t/module-gps-goouuu-tech-gt-u7/9617

• Electronic Component Tester

  https://create.arduino.cc/projecthub/mircemk/diy-super-simpl

• Transistor Curve Tracer

  https://www.instructables.com/Transistor-Curve-Tracer/

• Digital Clock 2

  https://danyk.cz/hodiny2_en.html

• Sine wave to ttl converter

  https://www.learningelectronics.net/circuits/sine-wave-to-ttl-converter.html

• Precision Audio Millivoltmeter

  http://www.redcircuits.com/Page6.htm

• JFet Préampli guitare

  https://www.sonelec-musique.com/electronique_realisations_pr

• Temp control DC fan

  https://www.circuitstoday.com/temperature-controlled-dc-fan
  https://www.schematics.com/project/temperature-controlled-dc-fan-35368/

• Main snifer

  https://envirementalb.com/non-contact-voltage-detector/

• 1KHz Sine wave Generator

  http://www.redcircuits.com/Page13.htm

• GipDip

  https://www.qsl.net/yo4rlp/wshp/gdo.html

• Measuring coil and IF transformer (w2aew 199)

  https://www.youtube.com/watch?v=Ff5xOENID7w

Frequency Counter

• FreqCount Library

  https://www.pjrc.com/teensy/td_libs_FreqCount.html
  https://github.com/PaulStoffregen/FreqCount
  https://www.hackster.io/mircemk/frequency-meter
  https://simple-circuit.com/arduino-frequency-counter-project
  https://create.arduino.cc/projecthub/ambhatt/frequency

• Frequency Meter with ESP32

  https://www.esp32.com/viewtopic.php?t=17018
  https://www.eevblog.com/forum/projects/using-esp32-and-neo-7

• 100MHz Frequency Meter

  http://www.technoblogy.com/show?20B4

• SAMD21 with 96MHz counter

  https://forum.arduino.cc/t/samd21-with-96mhz-counter/898900

• 74HC590 16 bit counter

  https://forum.arduino.cc/t/16-bit-counter-chip/332033/2

Signal Generators

• AD9833 Signal Generator

  https://www.teachmemicro.com/arduino-ad9833-signal-generator

Radio receivers

• 10kHz to 225MHz VFO/RF Generator with Si5351

  https://create.arduino.cc/10khz-to-225

• AD831

  https://www.amazon.fr/s?k=ad831

• Direct Conversion Receiver NE602 / Si5351

  https://www.youtube.com/watch?v=RBNEjY3JsvQ

Prescalers

• PLJ-8LED / MB506

  https://www.youtube.com/watch?v=WWy0821JLUQ

• MB501L datasheet

  https://datasheetspdf.com/pdf-file/530523/Fujitsu/MB501L/1

• SDA2101

  https://www.distronic.fr/composants-actifs/1212-circuit-inte

Other

• Prototyping

  https://hackaday.com/2016/05/04/...
  https://forums.parallax.com/discussion/163128/
  https://www.instructables.com/How-to-Prototype-Without-Using
  https://www.youtube.com/watch?v=kH110yjYZ2g (w2aew 122)
  https://www.youtube.com/watch?v=vq968AFgPhg (Leo's Bag of Tricks)

• AWG to mm

  https://www.sab-cable.eu/

• Enclosure Manufacturers

  https://pallavaggarwal.in/2022/07/13/plastic-enclosure-manufacturers/

• Graph Plotter

  https://www.desmos.com/calculator/

• Make a schematic

  https://forum.arduino.cc/t/how-to-make-a-schematic-you-can-post/675103