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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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 …

How to Control DC Motors Rotation ?

“Working on a autonomous robot, I needed to be able to control simultaneously two DC motors moves. I already designed a system in july 2016 that runs rather well but I needed to improve speed measurement precision. To do so …

How to Make WiFi Robot Car ESP8266 Nodemcu Wemos

“In this instructable, I will show you how to build WiFi Robot Car ESP8266 NodeMCU/Wemos. Let’s get started! Supplies: 1x PCB Nodemcu Motor Shield 1x IC L293D + Socket 16P 1x IC REG. 5V AMS1117 2x Transistor BC527 NPN …

How to Make Clap ON/OFF Switch || Without Any IC

“This Is A Clap ON Of Switch Without Any IC. You Can Clap First Time Then The Light Bulb ON And Clap Second Time The Light Bulb OFF. This Circuit Based On SR Flip-flop. Components 1. BC547 NPN Transistors (4pcs …

Alexa Home Automation System Using NodeMCU & Relay Module

“You can easily control light, fan, and other home appliances with the voice commands using the NodeMCU and Relay module. In this IoT project, I have made the Alexa Smart Home Automation system using the NodeMCU ESP8266 & Relay Module. You …

FPGA to FPGA IR Communication

“Communicating between FPGA up to 40 metres apart using IR modulation. Processing at the edge is a rapidly increasing application for embedded systems, often these edge nodes are connected using a RF link e.g. Zigbee, WiFi etc. However, there …

How to Make IoT Based Home Automation With NodeMCU Sensors Control Relay

“In this IoT based project, I have made Home Automation with Blynk and NodeMCU control relay module with real-time feedback. In the Manual Mode, this relay module can be controlled from Mobile or smartphone and, Manual switch. In Auto Mode …

Electricity/EM Field Detector (simplest One)

“This is a simplest EM field detector you can find on the internet. I designed it myself and it’s explained how it works in the next step. Basically what you will need, are two transistors some resistors, antenna for …

Project  Mini PLC

Mini PLC

“The Mini PLC card consists of a card developed by the Jefferson Bueno Channel on YouTube and allows you to use learning in low cost programming in relation to PLC commercials. The aim is to create an open software and …

Digital Controlled Linear Power Supply

“In myteenage years, about 40 years ago, I created a dual linear power supply. I got the schematic diagram from a magazine called ‘Elektuur’, nowadays called ‘Elektor’ in The Netherlands. This power supply used one potentiometer for the voltage adjustment …