Content for BC557

BC557

BC557 is a PNP transistor hence the collector and emitter will be closed (Forward biased) when the base pin is held at ground and will be opened (Reverse biased) when a signal is provided to base pin.

Simple Smartphone Metal Detector Experiments

“I will try to describe the principle of operation of a simple Metal detectors in which data is processed by a smartphone. The main principle of this detectors consists of LC oscillator which serves as a reference, and on the …

The Famous NE555 Timer-IC, Original and a Bit Larger

“Integrated circuits (IC) are indispensable today. They’re made up of many thousands of electronic components (transistors, diodes, resistors, etc.) and still don’t take up much more space than a fingernail. One of the most well-known ICs is the …

Giant 555 Timer

“A Working Replica of the classic 555 timer made using discrete components A fully functional replica of the classic 555 timer made using discrete through hole components which include only basic jellybean components like (to - 92) BJTs , 1/4Watt resistors …

Project  WiFive55

WiFive55

“Enhanced ESP-01 WiFi relay/SSR/opto module & 555 emulator. Yet another ESP-01 relay board but better: Does not glitch on boot! Breadboard friendly. In-situ programming. On-board buttons. Choice of outputs (GPIO, mechanical relay, PCB SSR, Fotek SSR, MOSFET …

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 …

Shield for Arduino From Old Russian VFD Tubes: Clock, Thermometer, Volt Meter…

“This project took almost half a year to complete. I cannot describe how much work went into this project. Doing this project alone would take me forever so I had some help from my friends. Here you can see our …

AVR High Voltage Programmer 2

“AVR-HV2 is Arduino based high voltage parallel programmer for AVR microcontrollers. This programmer can read, write, and erase both flash memory and EEPROM. Also, this can use to set fuse bits of AVR MCUs. AVR-HV2 programmer is designed …

Vacuum Fluorescent Display Controller

“A simple interface circuit to drive VFD displays. No fancy parts required, and runs on serial communication. What’s the Use? VFD displays are not trending anymore for some obvious reasons, they are made of glass (“uh cool!”), have an …

PWM Controller Using Transistors

“When designing RC Cars, Robots or any project that makes use of a motor it is essential to have to control the speed of the motor. For this you need a PWM motor controller, there are a ton on motor …

Digital Circuits 2: Some Tools

“When we work on electronic circuits, there are some tools that get frequent use. Things like multi-meters, oscilloscopes, and waveform generators. Working with digital circuit has some use for those, but brings with it different requirements that require different tools …