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.

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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 …

Brake Failure Indicator Using 555 Timer | Diy | Step By Step | How To

“Hi Today Instructable is very simple and easy to build Brake Failure Indicator CircuitA Complete Step By Step Video Tutorial is also given in the video below. Automobiles have been the primary mode of transportation for most of us and …

Dual-Band Guitar/Bass Compressor

“Background story: My bass playing friend was getting married and I wanted to build him something original. I knew he has a bunch of guitar/bass effect pedals, but I never saw him use a compressor, so I asked. He …

Electronic Decision Maker - 4046

“In this instructable I will show you how I made an electronic “decision maker” with the 4046 - phase-locked loop. What does that mean you ask? Well it’s basically a coin flipper. You press the button to start the oscillation …

Electronic dice with slowdown - NE555 & CD4017

“Have your dice ever fallen off the table after you rolled them when playing a board game? Yes? Say no more because in this instructable I will show you how I made electronic dice with the famous integrated circuits NE555 …

Building a PIN Diode Geiger Counter

“Exactly 30 years ago a great disaster struck the region of Chernobyl: a nuclear accident occurred that released a large quantity of radioactive particles into the atmosphere. And it is only five years ago that, with the Fukushima Daiichi nuclear …

TV Remote Tester - Making IR Sensor Module at Home

“Hi everyone.Today i will show you how to make the simple remote testing circuit with few resistors,transistor,IR sensor,led and diode.this project can also use as the ir module for other projects like line following robot …