Electronics Projects


electronics projects

Projects

Batteries
How to Recharge Batteries with a DC Power Supply
How to Recharge Batteries with Solar Cells
How to Build a Battery Eliminator

Switches
How to Build a Reed Switch Circuit

Resistors
How to Connect a Pull Up Resistor
How to Connect a Pull Down Resistor
How to Divide Voltage in Half with Resistors

LEDs
How to Vary the Brightness of an LED
How to Build an LED Driver Circuit
How to Build an LED Flasher Circuit
Infrared LED Circuits
How to Build an IR LED Circuit
How to Build an Infrared Detector Circuit
How to Build a Proximity Detector Circuit
UV LED
How to Build a UV LED Circuit

Capacitors
How to Charge a Capacitor
How to Use a Charged Capacitor to Light an LED
How to Discharge a Capacitor

Buzzers
How to Build a Buzzer Circuit
How to Vary the Volume of a Buzzer
How to Make a Buzzer Produce a Chirping Sound
How to Make a Buzzer Produce a Warbling Sound

Photoresistors
How to Build a Simple Photoresistor Circuit
How to Build a Dark-activated Switch
How to Build a Dark-activated Light Circuit
How to Build a Dark-activated Buzzer Circuit
How to Build a Dark-activated Motor Circuit
How to Build a Night Light Circuit with an LM741 Op Amp
How to Build a Night Light Circuit with a NAND Gate Chip
How to Build a Light-activated Motor Circuit
How to Build a Light-activated Buzzer Circuit
How to Build a Light Detector Circuit with a NAND Gate Chip


Transistors
How to Connect a Transistor as a Switch in a Circuit
How to Connect a Transistor in a Circuit for Amplification
MOSFETS
How to Build an N-Channel MOSFET Switch Circuit
How to Build a P-Channel MOSFET Switch Circuit
JFETs
How to Build an N-Channel JFET Switch Circuit
How to Build a P-Channel JFET Switch Circuit

Phototransistors
How to Build a Simple Phototransistor Circuit

Flex Sensor
How to Build a Flex Sensor Circuit with a Voltage Comparator

Thermistors
How to Build a Simple Thermistor Circuit

Varistors
How to Build a Simple Varistor Circuit

Diodes
Protection Diodes
How to Connect a Protection Diode in a Circuit
Laser Diodes
How to Build a Laser Diode Circuit

Transistors
How to Connect a Transistor as a Switch in a Circuit
How to Connect a Transistor in a Circuit for Amplification

Relays
How to Build a Relay Driver Circuit

Overvoltage Protection Circuit
How to Build an Overvoltage Protection Circuit

Transient Voltage Suppressors
How to Build a Transient Voltage Suppressor (TVS) Circuit

Comparator Circuits
How to Use the LM741 Op Amp as a Comparator
How to Build a Comparator Circuit with an LM311
How to Build a Comparator Circuit with an LM393
How to Build an LM339 Quad Voltage Comparator Circuit

Oscillator Circuit
How to Build a Voltage-Controlled Oscillator Circuit

Touch Sensor
How to Build a Touch Sensor Circuit (with a transistor)
How to Build a Touch Sensor Circuit with a NAND Gate Chip
How to Build a Touch Sensor Circuit with a Voltage Comparator Chip

Tilt Sensor
How to Build a Simple Tilt Sensor Circuit

Accelerometer
How to Build an Accelerometer Circuit

Op Amp Circuits
How to Build a Voltage Gain Op Amp Circuit
How to Build a Non-inverting Op Amp Circuit
How to Build an Inverting Op Amp Circuit

Microphones
How to Build a Simple Microphone circuit
How to Build an Electret Microphone Circuit
How to Build a Microphone Amplifier Circuit
How to Build a Sound Detector Circuit
How to Build a Sound Imitator Circuit

Speakers
How to Build a Simple Speaker Circuit
How to Build a Speaker Circuit with Adjustable Volume

Motors
How to Build a DC Motor Circuit
How to Build a DC Motor Driver Circuit
How to Build a Servo Motor Circuit
How to Build an Electric Fan

Fans
How to Build a DC Fan Circuit
How to Build an AC Fan Circuit

Hall Effect Sensor Circuit
How to Build a Hall Effect Sensor Circuit

Motion Detector Circuit
How to Build a Motion Detector Circuit
How to Build a Motion Sensor Light Circuit
How to Build a Motion Detector Circuit Using an Infrared Proximity Switch Sensor

Vibration Detector Circuit
How to Build a Vibration Detector Circuit
How to Build a Piezo Knock Sensor Circuit

Vibration Motor
How to Build a Vibration Motor Circuit

Alarm Circuits
How to Build a Motion Detector Alarm Circuit
How to Build a Vibration Alarm Circuit
How to Build a Light Alarm Circuit
How to Build a Sound Alarm Circuit
How to Build a Heat Alarm Circuit
How to Build a Tilt Alarm Circuit
How to Build a Door Alarm Circuit

Logic Chips
How to Build a Simple NAND Gate Circuit Using a 4011 Chip
How to Build an AND Gate from NAND Gates

Decade Counter Circuit
How to Build a Decade Counter Circuit with a 4017 Chip

Attenuator
How to Build a Simple Attenuator Circuit

USB
How to Build a USB-powered Device

Talking Toy Circuit
How You Can Build Your Own Talking Toy

Metal Detector Circuit
How to Build a Metal Detector Circuit

DC Power Supply
How to Build a DC Power Supply

Projects with Arduino
Arduino Circuits