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Low Power Audio Amplifier Using LM386
The circuit and PCB Design of Low Power Audio Amplifier using LM386 is posted here which used to drive at most audio power of 1 Watt.
http://bestengineeringprojects.com/low-power-audio-amplifier-using-lm386/
The circuit and PCB Design of Low Power Audio Amplifier using LM386 is posted here which used to drive at most audio power of 1 Watt. LM386 is an low voltage
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JFET Op-Amp Based Stereo Control Preamp:-
JFET op-amp have very low noise and a very high input impedance due to which they can be used in a large number of circuits. The circuits shown here fulfils the need of a handy, high performance simple control preamp.
http://bestengineeringprojects.com/jfet-op-amp-based-stereo-control-preamp/
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Single Phasing Preventer Circuit
The single phasing preventer cum high low and unbalanced-supply voltage cutoff relay described here ensure complete safety for 3-phase machinery.
http://bestengineeringprojects.com/single-phasing-preventer-circuit/
The single phasing preventer cum high low and unbalanced-supply voltage cutoff relay described here ensure complete safety for 3-phase machinery.
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5 state digital IC tester
Quite often electronics engineers and technicians come across the problem of fault finding or testing electronic circuit boards full of digital integrated circuits. A handy and quick look-tool ‘5-State Digital IC and Circuit Tester’ for such an analysis is a logic probe which does the job faster and easier by just touching this probe to different pins of various ICs and observing the logic levels.
http://bestengineeringprojects.com/5-state-digital-ic-and-circuit-tester/
A handy and quick look-tool '5-State Digital IC and Circuit Tester' check by just touching this probe to different pins of various ICs and observing the logic levels.
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Electric guitar preamp circuit
The entire circuit of ‘Electric guitar preamp circuit’ is divided into small sections to ensure simplicity and easy understanding of the project. The first section comprises a single transistor that serves as a common-emitter amplifier.
http://bestengineeringprojects.com/electric-guitar-preamp-circuit/
The entire circuit of ‘Electric guitar preamp circuit’ is divided into small sections to ensure simplicity and easy understanding of the project.
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12v, 7Ah Smart Battery Charger with PCB Diagram
here is a 12V, 7Ah smart battery charging circuit which is also referred as smart charger uses three stage of charging i.e. bulk stage, absorption stage and float stage.
http://bestengineeringprojects.com/12v-7ah-smart-battery-charger-with-pcb-diagram/
here is a 12V, 7Ah smart battery charging circuit which is also referred as smart charger uses three stage of charging i.e. bulk stage, absorption stage and float stage. Normal battery charger tech…
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Relay Tester Circuit
http://bestengineeringprojects.com/relay-tester-circuit/
Here is the relay tester circuit using timer IC 555 which is used measure pull in and release voltage of relays ranging from 6V to 28V DC.
Here is the relay tester circuit using timer IC 555 which is used measure pull in and release voltage of relays ranging from 6V to 28V DC. Various 555 circuit
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Electronics projects Based on operational amplifier 741 IC posted in best engineering projects
http://bestengineeringprojects.com/operation-amplifier-741-based-projects/
In the section operational amplifier 741 based projects we published various electronics projects based on operational amplifier 741 with circuit diagram, description and parts list
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Electronic Fuse Using Op-amp 741
Here is an electronic fuse using op-amp 741 which features slow-blow properties, a variable current limit, and ‘live’ indication of its operation. Moreover, it is simple to restore.
http://bestengineeringprojects.com/electronic-fuse-using-op-amp-741/
Here is an electronic fuse using op-amp 741 which features slow-blow properties, a variable current limit, and ‘live’ indication of its operation. More 741 based projects
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RFID Based Security System Using Microcontroller AT89C52
Different concepts of security system have flourished along with different techniques and different equipments. RFID; Radio-Frequency identification (RFID) is another achievement we are relying on for optimum security facility in multiple projects.
http://bestengineeringprojects.com/rfid-based-security-system-using-microcontroller-at89c52/
The core component of the project RFID based security system is microcontroller AT89C52. The RFID module works as sensor and displays the information
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Frequency Counter Schematic using Microcontroller AT89C51:-

Frequency Counter Schematic using Microcontroller AT89C51 is a simple yet mostly used frequency counter schematic used. The reason behind its simplicity also lies somewhere in the fact that this project uses only two components-AT89C2051 microcontroller and a 16*2 LCD.
http://bestengineeringprojects.com/frequency-counter-schematic-using-microcontroller-at89c51/
Frequency Counter Schematic using Microcontroller AT89C51 is a simple yet mostly used frequency counter schematic used. The reason behind its simplicity also lies somewhere in the fact that this pr…
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9V DC to plus/minus 5V DC converter

Presented here a simple circuit “9V DC to plus/minus 5V DC converter” that can convert 9V battery to plus/minus 5V DC supply using LM7805 and ICL 7660.
http://bestengineeringprojects.com/9v-dc-to-plusminus-5v-dc-converter/
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