wheconcepts.blogg.se - Persamaan dan pengganti ic lm324

DC voltage gain is large that is 100 dB.

Frequency compensated within IC for unity gain.

The circuit sensitivity can be changed by a variable resistor with the value 100K. If the circuit is operated below 9V (lower voltage) then we need to replace the value of a current limiting resistor from 470 ohms to 220 ohms for all the LEDs in the circuit. The circuit can be operated at 4.5Volts to 12Volts DC. The connection of LEDs count can also be improved up to 25. But this circuit uses only single op-amps from the four op-ampsĪ transistor 2N4401 is connected at the output of the LM324 to make the LED as well as piezo buzzer ON. This IC contains four high gain operational amplifiers. The LM324 operational amplifier is the heart of the circuit. The circuit is very simple to built using basic electrical and electronic components. LM324 IC based Cell phone Detector Circuit Diagram This circuit can be used for multipurpose like searching for a lost phone, finding a cell phone in prohibited areas. The encoded signals can be received when the cell phone receives a call or do calls while sending and receiving the SMS.

This circuit only detects the encoded signal, not the voice contents. The range of detection can mainly depend on the mobile phone because each mobile has their own signal generation capacity. The designing of this circuit is very simple and can be used to detect the cell phone from a distance of 10 to 20 meters away. The circuit diagram of LM324 IC based cell phone detector is shown below. Pin14 (OUTPUT4): O/p of the 4th comparator.Pin13 (INPUT4-): Inverting i/p of the 4th comparator.Pin12 (INPUT4+): Non-inverting i/p of the 4th comparator.Pin11 (GND, VEE): Ground or negative supply voltage.Pin10 (INPUT3+): Non-inverting i/p of the 3rd comparator.

Pin9 (INPUT3-): Inverting i/p of the 3rd comparator.Pin8 (OUTPUT3): O/p of the 3rd comparator.Pin7 (OUTPUT2-): O/p of the 2nd comparator.Pin6 (INPUT2-): Inverting i/p of the 2nd comparator.Pin5 (INPUT2+): Non-inverting i/p of the 2nd comparator.Pin3 (INPUT1+): Non-inverting i/p of the 1st comparator.Pin2 (INPUT1-): Inverting i/p of the 1st comparator.Pin1 (OUTPUT1): O/p of the 1st comparator.