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Month: May 2017

Low cost basic Polargraph

Low cost basic Polargraph

The polargraph is a fascinating vertical plotter, that uses two small motors and gravity to move a pen over a paper, controlled by software on a computer. Actually ‘polargraph’ is the name given to it by a guy who wrote an

Tom 25/05/2017 projects No Comments Read more

Portable dust sensor (SHARP)

Portable dust sensor (SHARP)

This is an Arduino-based battery powered air quality monitor using the optical SHARP GP2Y1010AU0F dust sensor (or its more recent version the GP2Y1014). It reports values in micrograms per cubic meter, which is also the unit of PM2.5 and PM10. Having

Tom 02/05/2017 projects 5 Comments Read more

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www.cassiopeia.hk

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Recent projects

  • Cube timer with touch pads
  • Beehive monitor, with load cells and temperature sensors
  • ESP32 with transparent LCD screen over VGA
  • Upgrading dust sensor to laser (PMSA003)
  • 8×8 LED mono matrix with ESP8266 web server
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