Content for PCB

Multiple Feedback Bandpass Filter for Woofer

“Band Pass filter is one which can pass only a specified band of frequencies. For example a band pass filter for woofers have the lower cutoff frequency as 200Hz and upper cutoff frequency as 2KHz, that is the mid range …

New Automated Driveway Gates

“This tutorial is for making DIY automated driveway gates for relatively cheap using Arduino, ESP8266, Raspberry Pi, and Blynk! Problem: My driveway is a public turn-around. Solution: gates. So we bought some gates, but getting out of the car to …

Project  Pico KeyPad

Pico KeyPad

“A shortcut keypad for your PC work. Pico KeyPad is a must-have shortcut keyboard for your PC work. This keypad consists of 9 keys (you can add more no. of keys), the size of this 9x9 keypad is small and …

Tiny Space Impact Game

“A rebuild of the Space Impact Rocket Game by Mohd Sohail. New hardware, 3D printed case, improved software, battery or externally powered. This project is a rebuild of Space Impact LCD game by mohammadsohail0008. I really liked the concept. This …

DIY Raspberry Pi Pico Starter Shield

“In this instructable, I will show you how to build Pi Pico Starter Shield a shield that will help you learn and make projects Pi Pico easier and faster. Let’s get started! Here are the components that you will …

HEXLight, a DIY Studio Light Alternative

“Hey everyone What’s up! So this is HEX Light which is a DIY Studio Lighting Setup that consists of a total of 72 High Power Cree LEDs and they are powered by a 12V 5A SMPS. LEDs are driven …

How to Make Stereo VU Meter

“In this project, i will show you how to make a simple & easy Vu Meter or Audio Meter using LM3915. What is a VU meter circuit? A VU meter is also an audio Visualizer that has a group of LEDs …

IoT based Door Security Alarm Project with Blynk

“Today security is one of the prime aspect in our society. Securing our home and family is important. In this article we will see how to make a IoT based Door Security Alarm using Blynk. Today security is one of …

Microphone Preamplifier – Sound Sensor

“This is an easy to construct dual-stage microphone pre-amplifier. The project can be used as a sound sensor or microphone pre-amplifier. The 1st op-amp pre-amplify the very low-level signal coming from the condenser microphone and 2nd op-amp provides more boost …

MQTT ESP8266 Home Automation Project 2021

“How to make MQTT ESP8266 NodeMCU Home Automation project to control relays from the switch and smartphone (Circuit + Code) through internet. In this IoT project, I have shown how to make an MQTT ESP8266 Home Automation project to control a …