January 11, 2012

DIY Digital Salinometer
Complex Hacks

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   Thanks to Daniel Kramnik who is a high school junior from Massachusetts for sending in his award winning DIY Digital Salinometer project. If you have never heard of a Salinometer before you can learn more about it here. The system is easy to troubleshoot since it is completely modular, since it is mounted to a piece of acrylic you can trace out circuits from the front and back of

DIY IR Trip Sensor based Stairway LED Lighting
DIY Stair Lighting

Instructables member ElJefeUno brought an awesome electronics project of building an Infra-red (IR) light trip sensor to light up your stairway. The sensor uses a directional IR LED beamed at a sensor that shoots past where you’ll walk. When you interrupt the light from the LED, the LEDs turn on for a period of time that you can adjust. Advantages of using IR LEDs includes: safe operation, low power consumption,