Category: pcb

Google Assistant Based Voice Controlled Home A…

Google Assistant Based Voice Controlled Home Automation using DIY Arduino Wi-Fi Shield

Check out the complete project to make a DIY Arduino WiFi Shield and then create .a Google Assistant based home automation project using the shield: https://circuitdigest.com/microcontroller-projects/google-assistant-based-home-automation-using-diy-arduino-wifi-shield

7.4V Two Step Lithium Battery Charger Circuit …

7.4V Two Step Lithium Battery Charger Circuit – CC and CV mode

The advancement in Electric Vehicles, Drone and other mobile electronics like IoT Devices seems to be promising for the future. One common thing among all these is that they are all powered by batteries. Following Moore’s law the electronic devices tend to become smaller and more potable, these portable devices should have their own source of power to operate. The most common battery choice for portable electronics today is Lithium Ion or Lithium Polymer Batteries. While these Batteries have a very good charge density they are chemically unstable under harsh conditions hence care should be taken while charging them and using them.

Read the complete article with all the needed files: https://circuitdigest.com/microcontroller-projects/two-step-lithium-battery-charger-circuit-with-cc-cv-mode

DIY Arduino Motor Driver Shield

DIY Arduino Motor Driver Shield

In this DIY session, we make an Arduino Motor Driver Shield to drive DC motors, stepper motor and Servo Motor. Compatible with Arduino UNO and Arduino Mega, this motor driver shield can operate 4 DC motors or 1 stepper motor and 2 servo motors at a time. Here two L293D Motor Driver ICs are used for driving motors and an 8-bit shift register for controlling them.

Arduino Alcohol Detector Circuit Board

Arduino Alcohol Detector Circuit Board

In this project, I am going to Interface an Alcohol Sensor with #Arduino. Here I have designed an Arduino Shield PCB using EASYEDA online PCB simulator and designer. Arduino Alcohol Detectorwill detect the alcohol level in breath and by using some calculations in code we can calculate the alcohol level in breath or blood and can trigger some alarm.

Simple Lie Detector Circuit The concept beh…

Simple Lie Detector Circuit

The concept behind this Lie Detector Circuit is that, we assume when a person lie he kind of pumps up his anxiety level which makes him sweat and develop moisture on his skin. We then use this piece of circuit to detect if there is moisture on his skin and based on the result we glow and LED, a green one for truth and red for lie. Of course yes this cannot be claimed as a lie detector, but you can use this to play with your friends and have fun. More than that you get to learn stuff.

DIY Power Bank Design on PCB

DIY Power Bank Design on PCB

DIY Stun GunHere you can find a detailed tutorial to build your…

DIY Stun Gun

Here you can find a detailed tutorial to build your own stun gun with circuit diagram and PCB design files.

High/Low Voltage Protector CircuitThis  High and Low Voltage…

High/Low Voltage Protector Circuit

This 

High and Low Voltage Protection Circuit will cut off the power supply to the appliances in case of High or Low voltage. It will also show a alert message on 16×2 LCD. In this project, we have used PIC Microcontroller to read and compare the input voltage to the reference voltage and take the action accordingly.

Earthquake Detector using Arduino Here we are using…

Earthquake Detector using Arduino

Here we are using Accelerometer ADXL335 to detect the pre-earthquake vibrations. Accelerometer ADXL335 is highly sensitive to shakes and vibrations along with all the three axes. Here we are building an Arduino based Earthquake Detector using Accelerometer.

Digital Voltmeter CircuitWe build a simple digital…

Digital Voltmeter Circuit

We build a simple digital voltmeter 

using a popular IC for voltage measurement namely ICL7107/CS7107. Using ICL7107, we can build accurate and very low cost voltmeter. ICL7107 is a 3.5 digit analog to digital converter (ADC) which consumes very low power. The IC has internal circuit for driving four seven segment display to display the measured voltage. It also has a clock circuit and a reference voltage source.