BC547

BC547 is a NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pin. BC547 has a gain value of 110 to 800, this value determines the amplification capacity of the transistor.

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Automatic Water Level Controller for Pump using 555 Timer IC

“Automatic water level controller for the submersible pump and overhead tank with 555 timer IC. Also check the underground tank water level. In this mini electronics project, I have shown how to make an automatic water level controller for the …

A Simple Clock

“In this coronavirus lockdown, I came back to my hometown. Everything is perfectly fine here but there was one small problem. There is no clock on my table. I know a table clock sounds a little redundant especially in this …

How to Build a Bluetooth Controlled Home Automation

“Do you want to automate your home? Ever wished to control your appliances with a swipe on your phone? Or do you want to learn how to build automation device for yourself? In this project, lets see how to build …

TL494 Working With a Crystal || Generate Perfect 50Hz Modified Square Waves

“Hello everyone! Thank you for stopping by this instructable. This is a very exciting project where I have made this TL494 based modified square wave module that is controlled by a crystal oscillator for having super accurate output frequency of …

Timer With TM1637 and Arduino

“This timer is useful in both domestic and industrial applications. It is a countdown timer programmable in the range of 1s …. 9999s. During this time, the load is powered by a relay on the board. For repeated timings, it is …

Adjustable High DC Voltage Generator

“This project is about building an adjustable high voltage generator (DC) from a low DC voltage supply. The voltage supply can range from 5V to over 25V (I use a 9V supply). Higher voltages can require heat dissipators attached to …

Smart Home With Multiple NodeMCU ESP8266 Network With Blynk

“In this IoT project, I have shown how to make IoT-based Smart Home Automation using Multiple NodeMCU ESP8266 network to control all the home appliances from the pushbuttons & Blynk App. If the internet is not available, then you can control …

An(Other) Intelligent 4-Wire Fan Speed Controller

“The internet isn’t exactly short of fan speed controller projects – nor am I. I’ve probably got about four or five variants of these I’ve built over the years. Recently I’ve taken the time to round up …

How to Make an Emergency Light

“Emergency lights are very useful gadgets and are quite popular, too. During the power failure, these portable lights are able to instantly illuminate through battery back up and never allow us to stumble in the darkness. Although you will find …

LED Fader - With or Without Arduino

“Have an awesome project in mind using some LEDs. In that project I will be using some LED Fading Effect and few LED Chaser Circuits. But before jumping onto that, I thought I should create a short tutorial and show …