ECE Projects


Electronic Projects

       AudioRF Circuits
         Audio Mixer Circuit
Audio Amplifier Circuit
Butterworth High-Pass Filters
Butterworth Low-Pass Filters
High-Pass Filter Circuit
Inverting A.C. Amplifier Circuit
LM380-Based Audio Power Amplifier Circuits
Low-Impedance Microphone Input_Preamplifier
Low-Pass Filter Circuit
Non-Inverting A.C. Amplifier Circuit
Peaking Amplifier
Tunable Band Pass Filter Circuit
Twin-T Notch Filter
Wien Bridge Notch Filter

      Event Detection Circuits
         Digital Counter Circuits
Event Interruption Alarm Circuit
Missing Pulse Detector
Peak Detector Circuit
Window Comparator Circuit

      Math Function Circuits
         Absolute Value Circuit
Non-Inverting Amplifier Circuit
Op-Amp Differentiator Circuits
Op-Amp Integrator Circuits
Voltage Doubler Circuit
Voltage Squarer Circuit

      Measurement Circuits
         Bar Graph Voltage Monitor Circuit
Differential Instrumentation Amplifier with a Bridge Transducer
Low-Voltage AC Voltmeter
Simple Frequency Meter
Simple LED Voltmeter Circuit

      Motor Control Circuits
         4-Phase Stepper Motor Transistor Driver
Transistor-based DC Motor Controller (Single Supply)
Two-Transistor DC Motor Driver

      Power Supply Circuits
         Circuit for Getting -5V from +9V
DC Voltage Polarity Inverter Circuit
DC Voltage Ripple Remover Circuit
Low DC-to-High DC Voltage Converter
Low-Cost Buffered Voltage Reference Circuit
Multiple Voltage (+_-12V and +_-5V) Power Supply
Negative and Positive DC Voltage Power Supply Circuit
Op-Amp Voltage Regulator Circuit
Power Supply Circuit # 1
Power Supply Circuit # 2
Series Voltage Stabilizer Circuits
Shunt Voltage Stabilizer Circuits
Simple Regulated Power Supply Circuits

      Sensing Circuits
         Comparator-based Light Detector
Darkness-Activated Buzzer Circuit
Flame Detector Circuit
Light-Activated Buzzer Circuit
Light-Controlled Oscillator
LM335-based Temperature Sensor Circuit
Op Amp-based Sound Detector Circuit
Water Level Sensor Circuit

      Special Function Circuits
         9400-Based Frequency-to-Voltage Converter
9400-Based Voltage-to-Frequency Converter (Dual-Supply)
9400-Based Voltage-to-Frequency Converter (Single-Supply)
AC Lamp Flasher Circuit
Clipper Circuit
Electronic Combination Lock Circuit
Inverting Clipper Circuit
Op Amp Summer as a Digital-to-Analog Converter (DAC)
R-2R Network Digital-to-Analog Converter (DAC)
Simple Logic Probe Circuit
Sound-to-'Dancing Lights' Converter Circuit
Ultrasonic Receiver Circuit
Ultrasonic Transmitter Circuit

      Switching Circuits 
        555 Timer  Switch Debouncing Circuit
Basic Bistable Multivibrator Circuit (Flip-Flop)
Digital Reset Switch
Touch-Triggered Switch
Transistor Circuit Substitute for SCR

      Timing Circuits
         555 Timer Astable Multivibrator Circuit; Pulse Generator Circuit
555 Timer Monostable Multivibrator Circuit
Basic Astable Multivibrator Circuit
Basic Monostable Multivibrator Circuit
Frequency Divider Circuit
Op Amp Square Wave Generator
Op-Amp Monostable Multivibrator
Phase-Locked Loop (PLL) Oscillator

      ToneWave Generators
         555 Timer Voltage-Controlled Oscillator
555-based Siren Circuit
555-based Toy Organ
Metronome Circuit
Quadrature Oscillator Circuit
Simple Function Generator Circuit
Sine Wave Generator Circuit
Three-Mode Tone Generator Circuit
Tone Burst Generator Circuit
Variable Frequency Tone Generator