This is an experimental product that simulates a real candle, lit up with fire and blown out with a mouth. When you light up, play the “Happy Birthday to you†song at the same time. When it blows out, the song stops playing. It can add a festive atmosphere to your birthday.
How it works: As shown above. Using the thermistor Rt and the miniature MIC (electret microphone) as the wick (to achieve the ignition of the mouth to blow out), several LEDs surround the wick, which is the candlelight when lit. Its working principle is briefly described as follows:
1. Use fire to illuminate Q3 Q4 to form a bistable trigger circuit. When the heater is used to heat the thermistor Rt, its resistance value decreases rapidly, and the Q4 collector voltage decreases. Q3 base voltage decreases. Q3 collector Voltage rise--Q4 base voltage also rises--Q4 collector voltage further reduces the circuit flipping, Q3 cuts off, Q4 saturates, Q4 collector output low level makes Q5 saturate conduction, LED gets electric light, and music The IC also has to start playing the "Happy Birthday to You" piece of music;
2. Blow out with the mouth When the mouth blows against the MIC, the electric signal induced by the MIC is amplified by Q1 Q2, rectified by the diode D1 into a positive pulse and applied to the base of Q3, and the voltage of the base of Q3 rises - Q3 set Electrode voltage is reduced - Q4 base voltage is also reduced - Q4 collector voltage is increased - Q4 base voltage is further increased, bistable circuit is flipped again, Q3 is saturated, Q4 is cut off, Q4 collector output is high When Q5 is turned off, the LED is turned off, and the music IC is also powered off to stop playing music.
Hands-on practice: Plug in the components as shown above. The components used in this circuit are slightly more than the previous circuit. Therefore, after the connection is completed, check carefully. After confirming the error, connect the power supply and use the lighter to grill Rt. The LED should be able to light up and the music IC starts working. The speaker has music broadcast, then the mouth is right. MIC blowing, LED and music IC can be powered off.
Precautions:
1. The thermistor Rt cannot be directly grilled, and the wire should be wound on it.
2. There is no "Happy Birthday to You" music IC in the electronic experiment kit.
3. Music IC connection, the power supply end and the trigger end are connected to the Q5 collector.
Lock Motor product introduction:
Safe Lock Motor, also known as The anti-theft lock motor, in the field of electronic Lock technology, Safe Lock Motor is a mechanical Lock components associated with the electronic control unit of the important parts.
Functions: it is widely used in various intelligent locks, such as Shared bicycle lock, fingerprint lock, glass lock, safe lock, hotel lock, family lock, inductive smart lock, etc
Features: Motor For Safe Lock is based on micro precision reducer development, small intelligent micro precision reducer can do 10 mm in diameter, is widely used in safe, locks, smart locks, sensor intelligent lock;
This kind of motor has the characteristics of low noise, low energy consumption, small volume, light quality, high precision, large torque and durability
Method of use: the best stable in horizontal plane, installed on the Safe Lock Motor output shaft parts, cannot use a hammer to knock, knock prone to press into the dc Safe Lock Motor drive, may cause damage to internal components, and cannot be used in the case of blocked.
Operating temperature range:
Gear Motor For Safe Lock should be used at a temperature of -10~60℃.
The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
If a Safe Lock Motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.
Storage temperature range:
Gear Motor For Safe Lock should be stored ta a temperature of -15~65℃.
In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.
Service life:
The longevity of Dc Motor For Safe Lock is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.
â—Use with a load that exceeds the rated torque
â—Frequent starting
â—Momentary reversals of turning direction
â—Impact loads
â—Long-term continuous operation
â—Forced turning using the output shaft
â—Use in which the permitted overhang load or the permitted thrust load is exceeded
â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
â—Use of a voltage that is nonstandard as regards the rated voltage
â—Use outside the prescribed temperature or relative-humidity range,or in a special environment.
â—Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.
when it come to volume production,we're a major player as well .each month,we rurn out 600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you
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Shenzhen Shunchang Motor Co., LTD. , https://www.scgearmotor.com