The transistor provides a drive for the 8-ohm speaker. The capacitors C1 and C2 are determined tones frequency rate. And the resistors R3 is controlled sound volume, so it must have less than ohms at 9 volt supply. I like to use a inverter logic gate since it is easy and cheap. But we do not use it directly.
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The transistor provides a drive for the 8-ohm speaker. The capacitors C1 and C2 are determined tones frequency rate. And the resistors R3 is controlled sound volume, so it must have less than ohms at 9 volt supply. I like to use a inverter logic gate since it is easy and cheap. But we do not use it directly. Mostly I use IC nand gates since includes for separate four positive logic nand gate on a single silicon chip.
Figure 1 Simple gate oscilator working In any circuit both analog and digital, an oscillation is generated with feedback. It also is this case we use R1, C2 to feedback current output to input cause oscillation.
As Figure 2 is simple tone generator using CD To understand the function of this circuit has to be patient read below by following these steps: 1.
Then, the voltage at pin 3 will begins charging C1 through R1. But C1 is also connected to the input of gate 1. Now C1 is discharged by the output of IC1b. Then will back and go as cycle to continue. If we reduce the supply voltage cause lowers the volume output. Which we can use between 3V to 15V. We should connect to ground unused IC input Pins 8, 9, 12 and How to assemble circuit.
This circuit I assemble it on a breadboard as Figure 3 , then Check for errors and be sure the leads of C1 and R1 do not touch. Then apply 9-volts battery to circuit. The piezo speaker should emit a tone. As video below. Contains within 4 NAND gate. To each oscillator circuit has a 2 circuit. This circuit provides a higher frequency, IC1c and includes IC1d. Another one, the frequency range below and include IC1a IC1b.
The low-frequency pulse is sent to control the work of another. The diode D2 will cause the oscillating sound. S1 open voting is oscillating slowly lowered slowly. The discharge of capacitor C1 value of the equipment does not need to be very accurate. SP1 except that it must be a transducer crystal. Then to transistor driver to output audio transformer to speaker. The sound of insects such as crickets, cicadas, resulting from flutter briefly.
We can use a multivibrator to connects as sound generator circuit to imitate these insects sound. Some electronic clock alarm tone also sounds similar to these insects. As Figure 1 is simple clock alarm sound generator that can assemble on a breadboard right away. Working of circuits As Figure 1 The circuit consists of two astable multivibrator, firstly include both gate IC1c and IC1d are used generate low frequency as the sounds of insect wings.
A second also include with both gate IC1a and IC1b same simple tone generator using CD which is higher frequency than first. And they are used to set rhythm interval of sound. The output of multivibrator 2 pin 4 of gate I2 will be controlled by the first astable multivibrator which generates the low frequency as the tone burst signal characteristics.
Figure 1 We control them switch continuously with oscillation and stop oscillation with low frequency about 5 Hz.
The Devices R and C astable multivibrator as circuit will get tone frequency about Hz and Strokes will interval is about 0. Please try modifying these to change the R and C melodic sound to listen up.
CD4011 DIP-14 Invertör ve Kapı Entegresi
Each NAND gate has two inputs and one output. Each output can deliver output current of about 10mA at 12V but this range can reduce as the power supply voltage reduces. The positive terminal of the battery was connected to the pin 14 and negative terminal of the battery was connected to the pin7. The output pins of the IC are 3,4,10,11 and input pins are 1,2,5,6,9,8,12, Now let us see how this Integrated circuit works and how can we use it for our operations. N4 was wired independently and there is no dependency on other gates.
CD4011 2 input NAND Gate IC pinout, features and example
Astable à transistors, CD4011, CD4069 et NE555.