Matthew Yang

Instructables

• 

  Arduino Burglar Alarm V1

  17
• 

  Homemade Signal Switching Transistors

  31
• 

  Arduino Mega 2560 Metal Detector

  35
• 

  PH Testing Strips

  78
• 

  Electronic Heavy Metal Test for Dry Soil

  91
• 

  Rat Trap

  570
• 

  Morse Telegraph (Incomplete)

  2 375
• 

  Wall Clock With Cardboard Hands

  2 328
• 

  Plastic Bottle Finch Feeder

  438