Projects
Circuit Analysis This circuit is a 12V, 5A regulated power supply, based on the 7812 voltage regulator and BD434/436/438 transistors to increase the available output current. Let’s analyze how it works: Rectification and Filtering The transformer...
The invisible theft alarm system consists of a phototransistor and an infrared LED. When the infrared beam is unobstructed, the alarm remains silent. However, if the infrared beam is interrupted, the alarm is triggered, emitting a sound. The system...