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Developing A Cat Door with Tweeting Ability

Developing A Cat Door with Tweeting Ability

The project captures cat door events and sends a Twitter message along with a picture to the Twitter in order to determine from which owner the other cats belong to since they are always seen in the garage feasting on the food.

Soft Touch Designed ON/OFF Toggle Switch

Soft  Touch Designed ON/OFF Toggle Switch

A soft touch switch is illustrated in this project which can set the device ON by pushing once and set the device OFF by pushing again.

Spot Welder in Homebuilt Design

Spot Welder  in Homebuilt Design

The project illustrates how to build a homemade spot welder which can be used for welding two pieces of metal together by producing a highly defined point of contact weld and using a microwave oven transformer.

Flash Destroyer Used for Testing EEPROM Memory

Flash Destroyer Used for Testing EEPROM Memory

The quality of EEPROMs is tested in this project by allowing the Flash Destroyer device to write and verify an EEPROM memory until it reaches failure.

Back Horn Speaker Kit Known as Tang Band D4-1

Back Horn Speaker Kit Known as Tang Band D4-1

The project illustrates the setup and proper tools for back horn loudspeaker enclosure building which is pre-cut and pre-finished.

Building the Sun Mirror Device

Building the  Sun Mirror Device

A popular circuit known as Solar Engine is used by this solar powered artbot Sun Mirror which consists only of two transistors, one capacitor, and one flashing LED.


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