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.

Main Content

DIY ESP32 Camera Motor Shield - Wifi Camera Robot Car

“To design a PCB use Autodesk Eagle software, which is a CAD program specifically designed for making circuit boards. This software is free for 2-sided boards up to 80cm². This should be more than enough area for any hobby project …

ESP32 Smart Home System With Alexa App & Manual Switches

“In this IoT project, I have shown how to make IoT based Smart Home Automation Using Amazon Alexa & ESP32 to control 8 home appliances from the manual switch & Amazon Alexa App. If the internet is not available, then you can …

LED Chaser Circuit Without IC

“In this Instructable I show you how to make a simple LED chaser circuit. The special thing about this circuit is that it does not use an IC (Integrated Circuit). By using different resistors, capacitors and transistors, I succeeded in …

Simple Flip Flop Circuit

“In this Instructable I show you how to make a Flip Flop LED circuit. The special thing about this circuit is that it does not use an IC (Integrated Circuit). By using different resistors, capacitors and transistors, I succeeded in …

Wireless AC Current Detector

“While making my previous Instructable (easy infrared proximity sensor) I figured out a few things about using 2 transistors in a row to amplify a very weak signal. In this Instructable I will elaborate on this principle which is also …

How to Make a IR Proximity Sensor at Home

“In this Instructable I show you how to make a simple infrared sensor for hobby projects and to learn how an infrared sensor works. I used an infrared sensor with one of my previous Instructables (the automatic hand sanitizer dispenser …

Two Auto-OFF Timer Circuits || 555 IC or Transistor

“The Timer circuit turns ON when connection is given and turns OFF automatically after few seconds, depending on the value of Capacitor used in the circuit. Here, I will show you two different ways to make this circuit using : 1 …

Home Automation with NodeMCU LDR Temperature Control Relay

“In Manual Mode, control the relay module from Touch Switch & Blynk App. In Auto Mode, DHT11 & LDR will control the Relays Automatically. In this IoT based home automation project, I have made home automation using Blynk & NodeMCU with Touch Sensor …

Portable Disco V2 -Sound Controlled LED’s

“I’ve come a long way with my electronics journey since I made my first portable disco. In the original build I hacked together a circuit on prototype board and managed to build a neat, little pocket disco. This time …

UltraSonic Liquid Level Controller

“A Simple ultrasonic liquid level controller based on STM32 microcontroller Introduction As you probably know, Iran has dry weather, and there is a lack of water in my country. Sometimes, especially in the summer, it can be seen that the …