Sound control lighting electronic wall clock circuit schematic
The sound sensor uses an electret microphone. When the palm is hit (about 1.2 seconds each time), it is amplified by vT1 to trigger a single stable circuit composed of IC1 left half (1/2 556) and R5, C4. The width is td two 1.1R, C4, and the shaping pulse of 1.2 seconds. IC2 uses octal count/pulse splitter. When three consecutive shots are taken, the three pulses output by the 555's 3 feet will cause the IC1's 1, 3, and 7 feet to appear high level, VT3 saturate on, and its C pole. The low potential (connected to pin 4 of ICl) forces IC1 to reset and the audio signal is blocked. At the same time, VT5 saturates on, IC3 gets VDD ≈ 6V voltage, and the single stable circuit composed of IC3 (555) and R15, C8 starts to work, its timing time td=1.1R15C8, about 10 seconds. Then VT7 is saturated and the small bulb H is lit. After l0 seconds, H is off. At the same time, VT6 is turned off, and a positive transition pulse is set to zero by D9, and the initial state is restored.
The electrolyte material inside the electrolytic capacitor, which has charge storage, is divided into positive and negative polarity, similar to the battery, and cannot be connected backwards.A metal substrate having an oxide film attached to a positive electrode and a negative electrode connected to an electrolyte (solid and non-solid) through a metal plate.
Nonpolar (dual polarity) electrolytic capacitor adopts double oxide film structure, similar to the two polar electrolytic capacitor after two connected to the cathode, the two electrodes of two metal plates respectively (both with oxide film), two groups of oxide film as the electrolyte in the middle.Polar electrolytic capacitors usually play the role of power filter, decoupling (like u), signal coupling, time constant setting and dc isolation in power circuit, medium frequency and low frequency circuit.Non-polar electrolytic capacitors are usually used in audio frequency divider circuit, television S correction circuit and starting circuit of single-phase motor.
Electrolytic Capacitor,Aluminum Electrolytic Capacitor,High Voltage Electrolytic Capacitor,12V Electronic Components Capacitor
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