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When the circuit is waiting to detect audio, the 2u2 is charged via the 47k on the base of the first transistor and 47k collector resistor of the second transistor (plus the base-emitter voltage drop of the first transistor.
70 interesting circuits - download as pdf file (pdf), text file (txt) or view presentation slides online 70 interesting circuits.
This circuit is under:, circuits, 70 interesting circuits l53288 this circuit will detect ac line currents of about 250ma or more without making any electrical connections to the line current is detected by passing on of the ac lines through an inductive pickup.
555 circuitspdf - talking electronics 108 pages 2014 216 mb 1,871 downloads shown on a circuit diagram (such as 100p on a circuit and 101 on the capacitor or 10 on a capacitor and 10p see his e.
كتاب 70 دائرة الكترونية مثيرة للإهتمام (70 interesting circuits) ، يحتوى الكتاب على 70 دائرة الكترونية مشروحة بالمخطاطات الخاصة بها وهذا الكتاب هو من سلسلة كتب ( talking electronics .