Here is a great collection of touch switch circuits. A touch switch is an electronic device that enables us to control a circuit by simply touching a sensor. Simple touch switch circuit with 4011 – ...

Electronic gizmos and living cells alike can process signals, turning inputs into outputs—even recognizing when gray-area signaling is dark enough, or light enough, to justify decisions that are, well ...

Designers can make useful products that include electrical components close electrical componentA device in an electric circuit, such as a battery, switch or lamp.. They allow a product to have lights ...