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Music doorbell IC chip toy voice chip IC music IC toy duck called IC voice chip (20121218 14:56:03) Reprinted ▼ Tags:
Christmas music recording ic chip ceremony Music chip doorbell ic ic toys
Category: Recording IC, Christmas music chip, gifts
it Musical toys IC chip doorbell IC chip music IC toy duck voice IC voice chip called horse called world music six Christmas 12 Christmas 18 Christmas 20 phone ringtone application circuit chip BUZZ doorbell ring core company "ding, dong "sound of the doorbell electrical schematics. It is the use of a timebase circuit and peripheral components of the manifold. It's a beautiful sound realistic alignment simple and easy, low cost, a 6V battery can be laminated over three months, low power consumption. Figure IC is the time base circuit manifold 555, which constitutes astable multivibrator. Press the button AN (mounted on the door), oscillator, the oscillation frequency of about 700Hz, the speaker issued a "ding" sound . At the same time, the power to charge C1 through the diode D1. When you release the button, C1 will discharge through the resistor R1, sustain oscillation. However, due to the AN is disconnected, the resistor R2 is in series circuit, the oscillation frequency changes, is about 500Hz, the speaker "dong" sound. Until the voltage on C1 into oscillation can not be maintained until 555. Wrap the length of the "boom" sound can be changed by changing the value of C1. Without battery twotone doorbell Http://www.atchip.com With the increasing penetration of telephones, have home phone home more and more, but most residential phone usage is very low, the use of telephone households feeder supplied 48V (60V) DC feed for electronic doorbell The work energy is economical and practical. Now introduce a twotone doorbell without the battery circuit. Schematic circuit as shown, is not difficult to see that the circuit diagram is a variant of conventional telephone ringing circuit. a, b are the home telephone line positive and negative at both ends. AN doorbell button is normally open, waiting at the phone, press the AN, PBX provides 48V (or 60V) voltage DC feed through VD1, R1 to charge the capacitor C1, when C1 terminal voltage Vc reaches of IC1 When the voltage from the control, IC1 startup sent twotone electronic ringing the buzzer B sound, inform the owner when guests are coming. And when the phone is in use, the figure a, b
between the voltage from the control voltage is less than the lower reaches of IC1, this time, even if you press the doorbell button is not working AN This is because the value compared with R1 large, much larger than the impedance of the telephone. It has no effect on normal telephone calls when the AN pressed. No adverse effects on the PBX, only when the doorbell for incoming calls during busy. Analysis and improvement of a doorbell ring core public an intercom doorbell circuit shown, it works as follows: When the hook hook switch HS usually 1,2 contacts connected with AC220V power supply, V1 with DC output, this voltage is only for charging the battery, also added to the music of the IC ③ feet. Such as click S, the music IC's foot triggered ②, ④ feet musical output, amplified by V2 push speaker sound while driving through R5 Y2, Y3. After the hook, hook switch HS 1,3 contacts connected, call the circuit is powered, then can be intercom. The doorbell due to the high audio amplifier IC2 (LM386) gain, easy to Y2, Y3 produce howling. Actual verification by the author, as long as Y2, Y3 parallel across a few pF of small capacitors, howling can be removed . Without music doorbell button This paper describes a button without music doorbell, doorbell come before long standing, you can automatically send the doorbell. Music doorbell circuit schematic as shown in the drawings. IC1 and other components infrared transmitter circuit by IC1, RP, R1, C1 constitute a multiharmonic oscillation frequency component data shown in the figure, the oscillation frequency of about 40kHz, output current is 100200mA, can drive emits infrared lightemitting diode D1 40kHz modulated infrared pulses. IC2 is the infrared receiver chip, high sensitivity, high gain, good output waveform, and has a frequency discriminator function. D2 receives the infrared receiver frequency to 40kHz infrared pulse is converted to an electrical signal fed to the first IC2 pin ⑦, amplified, and C5, L tuning detector and the internal circuit IC2, after shaping, the output pulse from the first signal pin ①. When the ring core equity, IC2 first ① pin output low battery, D3 deadline, music IC IC3 no trigger pulse, no music signal output, speaker B does not sound. When someone standing in front of the block D1 transmit infrared signals, IC2 first potential instant ① feet from low to high, triggered by D3 IC3 output music signal, driven by V amplified speaker sound. IC1 use NE555, IC2 is μPC1373, IC3 selection of music IC 9300 series. D1 available SE303A or AC80E type 5mm round infrared lightemitting diode, D2 available PH302 square infrared receiver diode. V for 9013NPN tube, β≥100. B selection YD581 type, 8Ω / 0.25W smallcaliber speakers. L with 0.08mm high strength wire, on a small transistor radio IF transformer skeleton can be tightly wound 30 turns. Two kinds of free music doorbell button ring core company Doorbell required to install the installation, and thus there is trouble to install and easy to lose damage and other problems. Composite switches instead of mechanical trigger switch make music doorbell, you can overcome these drawbacks. Figure 1 is a vibration. When someone knocks hand, the piezoelectric ceramic sheet YD is mounted inside of the door is subjected to vibrations generated by a voltage corresponding to the audio, and the composite tube BG2 BG1 switch is turned on, the circuit CIC music playing a piece of music that is being triggered. Piezoelectric ceramics is appropriate to use a larger diameter, with 502 bonding glue to the center of the door biased position. Figure 2 is a touch. When your fingers touch the circuit with point A, human induced voltage of the composite tube BG1 and BG2 conduction, music circuit CIC triggered by some music that is played. Touch a metal plate available electrode A moderate size can be fixed on the door.
Touch Touch doorbell doorbell ring core chip companies described in this article, instead of mechanical switches with touch mode, it is simple and reliable, practical and interesting. How it works: electrical schematic diagram as shown. 555 IC operates from a single steady state, usually ③ ⑦ feet and legs are low. When touching something metal sensor chip M, the body's sensing signal through 0.1μF capacitor added to the 555 IC ② feet, flipped into the temporary state of the circuit, then ③ feet high output directly added doorbell trigger end chip, the chip is triggered and driven by transistor speaker sound. ⑦ feet while also goes high, the power supply through 100KΩ resistor 4.7μF capacitor charging, when the voltage on the capacitor charge to twothirds of the supply voltage, the circuit and flip, temporary steady end, ③ pin goes low again level. M once again be touched when the work process again and again. So every touch once M, the doorbell is triggered once. ③ feet 0.01μF capacitor capacitance of interference to prevent false triggering of the doorbell. Component selection and production: doorbell chip used in this circuit, "dingdong" (AC80F) chip, which is triggered every time, although after ③ pin goes low, it can still send three consecutive "dingdong" sound. Such as the selection is needed in order to trigger high end has been vocal chip (such as music chip), should be adjusted RC time constant ⑦ feet to adjust the temporary state of the time, so ③ feet high enough the chip after issuing a complete music becomes low. It should also promote the power transistor chip measure the doorbell base potential, such as static (no sound) is low, then use an NPN transistor as a push tube, the purpose is to prevent static dynamic consumption and extend battery life. Touch the best piece of lead time is too long to use shielded cable and ground the shield. The circuit is made as simple as installing correctly to work properly. The circuit can also be extended to touch switches, touch alarm and other practical circuits. Simple twotone electronic doorbell Http://www.atchip.com This paper describes a dualtone doorbell IC constituted the circuit shown below, the core part of the AC80F circuit. This paper describes a dual voice circuits simple voice circuits. Components less quiescent current of only 1mA. This circuit can be used for voice and voiceactivated toys doorbell. Works :( ring core companies) principle voice circuit. It consists of a voice sensor, a receiving amplifier, the emitter output, a music integrated circuit, light emitting diodes, speakers, and other components. The external control signal generated by the sound from the electret condenser microphone BM into electrical signals, and is coupled via a capacitor C1 to the voltage amplifying transistor VT1. VT1 output signal via a diode VD2 driver transistor VT2 conduction, so that the power supply voltage is applied to the music integrated circuit IC ② feet (trigger side), music IC③ foot music signals emitted by the VT3 amplified to drive the speaker BL loud music sound. And some Meanwhile, light emitting diodes VD3, VD4 the size of the music frequently flashing, like a doll two shining eyes. Regulating circuit resistance potentiometer RP, you can change the BM operating voltage, and thus play a role in changing the voice sensitivity. Capacitor C2 is to prevent false triggering, avoid inrush current impact face settings. Components Selection: VT1 ~ VT3 selected 9014 highgain transistor, its penetrating current is small, β> 80. BM can choose CN15E or other electret microphone impedance 1KΩ's. Music IC IC selection KD152 and other operating voltage of 3V
sheet music integrated high level trigger. VD3, VD4 selection of low voltage, low on current and a light emitting diode with high emission efficiency. The remaining components according to figure marked value selection, no special requirements. Installation and use: (A) If the family has music doorbell , you do not have to make circuit housing, according to the diagram add control circuit can be. (2) electret microphone BM, mounted outside the frame, highly visible human height may be. For the BM kept clean, available a small cloth cover and marked "Voice" word, you can decoration, but also compelling. Ring core company (3) In order to prevent outside interference caused by misuse of sound work, to adjust the RP, so that BM has the appropriate sensitivity, people mouth off about 30mm electret microphone BM can trigger doorbell appropriate. (4) lightemitting diodes for voice doorbell, only a light tube, which was installed in a conspicuous place outside. When people sound like LED display, then tell outsiders, please rest assured the circuit is working properly. (5) If as children's toys, the choice of a hollow plastic or fluffy toys, will VD3, VD4 into the two eyes, as long as the children's voice, eyes flashing doll will sing, quite fun. (6) when the child does not play, remove the battery. The best selection of 4.7K potentiometer with switch, the switch can be adjusted so that the static power consumption can be saved. Touch music doorbell KD482 used in quartz whole point, as in its external plus installed a few electronic components, may form a touch of music doorbell. Circuit operating current of 60mA, the quiescent current is almost zero. The circuit is shown below. VT1, VT2 composed touch sensitive switch. When light hand touching the metal sheet A, the injection of the body to the gate of a sensing signal VT1, so that the drain current decreases VT1, the resistance between drain and source is increased, C becomes the high potential point, VT2 conduction, lightemitting diode VD1. At this point D goes low, KD482 is a low level of the SW end of the oscillation triggered by the VT3 amplified signal to drive the speaker BL sound. Leave the hand A, VT1 of the drain current becomes large, the drain, the gatesource resistance is reduced, C goes low point, VT2 off, VD1 extinguished, D goes high potential point. BL after the broadcast finished a song will automatically stop. Component selection: fieldeffect transistor VT1 can also be used in addition to other outside 3DJ6E junction field effect transistor , but requires saturation drain current of less than 1mA. Lightemitting diodes VD1 models can be arbitrarily chosen, for the better, VD1 voltage should choose to work at 2 ~ 2.5V. High luminous efficiency of the arc tube. The area of the metal sheet is about 300mm. Debugging: circuit connected in the figure, the first negative and the SW end of the power of using a metal wire short answer (KD482 is low trigger), BL released music can be. The control circuit is only a minor adjustment, not before touching A, will play in the DC 1V stalls multimeter to measure b VT2 base and emitter voltage across e should be less than 0.7V, then hand touch A, this time pointer greater than or equal to 0.7V. If not reach this value, may be appropriate to change the resistance R2 or R3, the two resistors best fit adjustment. Installation and commissioning: ring core company Since the circuit quiescent current consumption is minimal, it can save power switch. A
distance between the gate and the VT1 may vary depending on the actual situation, preferably not more than 1m. Lightemitting diodes VD1 best fitted with a touch sheet A conspicuous place at the door, when the door person to touch the A, VD1 instantly luminous display, it means that the circuit is working properly. When touching A, sometimes occasionally occur circuit does not work, then VT1 and VT2 should choose magnification larger pipe. The circuit can also be used for security, the contact line VT1 gate installed in the door handle or door locks and other metal parts, when the hand of a thief can contact the police. This circuit can be used to touch upon change children's toys. KD482 of the E, E 'buzzer connected at both ends of the original ceramic pieces, such as to improve connect two lightemitting diodes VD2, VD3 (as shown below), and lightemitting diodes VD1 mounted in the middle of the forehead just like three eye, not only sets the sound. Light and color in one of the new and interesting, but also would bring children's favorite. Wherein VD1 is used to control the light and dark, VD2. VD3 is with the size of the music rather frequently flashing. Share it:
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gold door knocker earrings
