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Pat remote activation principle explanation

2017-08-16 11:53  
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This article is pat remote activation principle explanation. By convention, in order to better grasp the principles you are, we recommend you to combine text read schematics. The first shot needs it from standby to start scanning 8 mounted on the front panel LEDs. Each of the four switches are accompanied by two leading business? 'One for the other for display-off state. The second shot, and appropriate leadership is ignited, the activation function. For example, if you shoot while LED10 combination lamp 1 is lit then the light. (If it is already in, nothing happens, it is still there.) A condenser microphone for voice recorder, is used here to pick up the sound of clapping. Signal is amplified by the three form a pulse inverter (N1 through N3) included in the CMOS IC  CD4069  hex inverter. A clock generator consists of two inverter gates (they N6) supplies clock pulses to a decimal counter CD4017 (IC2). Eight output circuit driving the light emitting diodes (1 to 8). These outputs can also go to the J and K inputs of four flops in two types CD4027 ICs (IC3 and IC4). Clock input of these flip flops are connected to the pulse-shaped audio signals (available output gate N3). Additional circuit CD4017 counter can be sure that it is in the reset state, the number 9 is reached, the reset is to remove the sound signal reception. Four output buffer transistor flip-flops are fed through the iron gate led four triacs. These triacs switching power supply four loads, usually lamps. If the small lamps are to be controlled, which may be directly from the transistor. If this circuit is active, the scan all of the time, some of the components can be ignored and some surrounding CD4017 IC connection change. But it will no longer be immune occasional false sound. Capacitive microphone normally available on the market has two terminals. It must provide power for its functionality. Any interference with the water supply line will be passed to the output. Therefore, the microphone is smooth supply of resistors and capacitors combine R2, C1, and feed it through resistor R1. CD4069, hex unbuffered inverter, inverter contains six similar. When the output and input of an inverter bridge such a resistor, it functions as an inverting amplifier. Capacitor C2 couples the drive signal developed by the microphone N1 in this integrated circuit, which is configured as an amplifier. The output of gate N1 is connected directly to the input of the next gate N2. The output capacitor C3 couple inverter inverter to N3, which is connected as an adjustable level comparator. Inverter is connected as a leading silicon ceramics (9) to help the driver to set the sensitivity. Preset VR1 supply a variable tendency U3. If the wiper is set to negative VR1 supply side, the circuit becomes relatively insensitive (ie need a thunderous clap operation). As the wiper is turned resistor R4, the circuit becomes more sensitive. Sound signals to provide door-N2 is added to the voltage setting preset VR1 and applied to the input of gate N3. When the voltage across half the supply voltage, the output of the gate is low, N3 this output is usually high from the input held low by adjusting preset VR1. This output is used in two ways: first, it releases the reset state of IC2 through diode D1. Second, it is the clock input contains four flip-flops in the IC3 and IC4. In the quiescent state, IC2 is reset and its output is a high Q0 '. Capacitor C4 is positively charged, including the costs due to the connection from R5 this output (Q0). IC2 is a decade counter with fully decoded outputs. It has ten output to your school's label, has Q0 higher, one at a time, when the bell to be fed and beans. IC3 and IC4 are dual JK slippers. In this circuit, they store (lock) status, four switches and control output through the transistors and triacs. In the first film, the gate output is low N3. Diode D1 is forward biased and its conduct, discharging the capacitor C4. Reset input of IC2 is low, the release of its reset state. All of the J and K inputs of four flops is very low, so these do not change state, even if they receive the pulse of the clock input. When the reset input of IC2 is low, each clock pulse causes the output of IC2 and move one number higher, the corresponding light emitting diode and has high input J and K of the four flip-flops, one by one. Limit the current through resistor R8 led 1 到 8-2 horses. Large currents can cause failure due to IC2's output was removed less than a logic 1 state input voltage. If the second test and J applause specific trigger input is high, the output will rise, Q regardless of what kind of state is in the past. Similarly, if its K input is high, the output will be low. (If both J and K is high, the output will change state every clock pulse). Resistors and capacitors R9 C6 ensure slippers started off state when the power circuit is switched on, by providing a positive power-on reset pulse reset input pin power applications. Default input pins are not used, so directly connected to the ground. When, after eight clock pulses, the output of IC2 becomes high disposal, the diode D2, charging the capacitor C4, thereby re-set, so that Q0 IC2 output high. There it stayed, waiting for the next one applauded. Four questions IC3 and IC4 output is buffered by npn transistor, fed through current limiting resistor and a light emitting diode (indicate on / off status of the load) gates four triacs. Four lamp operating power may thus be controlled. Demonstrations, it may be better to open a small lamp (Figure less than 100 mA at 12 v) directly from the emitter of the transistor. In this case, triacs, light emitting diodes and their associated current limiting resistor can be omitted. Must be noted that the side of the power supply must be connected to the negative supply line circuit when the power load control. This requires the construction safety circuit, so that no part is easy to be moved. LED9 should be turned off, and should flash when the terminal capacitor C2 is touched with a wet finger (typical wet finger test). Preset VR1 may need to be adjusted until LED9 just closed. Output of gate N2 will be half the supply voltage. The output of gate N3 will normally be higher. Changes in the input voltage should be varied when the preset gate N3 VR1. Efficient light-emitting diodes should preferably be used in this circuit. Microphone has two terminals, one of which is connected to its body. This pin must be connected to circuit ground, and the connected resistors R2 and capacitor C2. If you are a first reading on this principle, we recommend that you carefully read several times in order to better fully grasp this simple but effective circuit.

Clap Activated Remote

Clap Activated Remote

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