Content for 4N35

4N35

The 4N35 is an optocoupler for general purpose application. It consists of gallium arsenide infrared LED and a silicon NPN phototransistor. What an optocoupler does is to break the connection between signal source and signal receiver, so as to stop electrical interference.

Enhanced ESP8266 Based WiFi Fan Speed Regulator

“This instructable will guide how to make an Ceiling Fan Speed Regulator using Triac Phase angle control method. Triac is conventionally controlled by Atmega8 standalone arduino configured chip. Wemos D1 mini adds WiFi functionality for this regulator. Featuring - 1. Both …

$3 Smart Bulb Holder

“Most of the time I realized the necessity of controlling my room light from my bed. I can replace the bulb with a smart bulb but they are expensive. Some cheap solution is available using remote control but for this …

Automatic Turntable With Shutter Release

“Hello. In this article Ill explain how to build simple and ultra cheap automated turntable with shutter release. The price for all parts are little less than $30 (all prices are taken from Aliexpress). Most of the 3d artists, who …

Simple (hardware) Watch Dog Timer for Arduino Projects

“We all use and love the Arduino boards for our projects. But sometimes it can happen, that a software or hardware error causes a lot of frustration, by stopping out little board from running 24/7. For this reason Arduino …

Self Balancing Robot Using PID Algorithm (STM MC)

“Recently a lot of work has been done in the self balancing of objects. The concept of self balancing started with the balancing of inverted pendulum. This concept extended to design of aircrafts as well. In this project, we have …

Robot Car Bluetooth Controlled- Obstacle Avoidance Robot Car Using Pic32 Microcontroller

“”Robot-Car: Design Fused with Obstacle Avoidance Technology” Recently, there is an intensive research undertaken in the field of intelligence robotics and autonomous mobile robot applications. Through the this project we wanted to explore this field by building a robot car …

DIY Relay Board

“Relays are always used for AC switching circuits…we frequently need AC loads like Fan Bulbs to operate automatically with conditions like decreased light, increased temperature, etc.Also we come across situations like when we need to control appliances remotely …

High Speed Photography Flash Trigger by Sound or Laser Barrier (Arduino)

“Introduction High-speed photography can be a game of trial and (much) error. When I started experimenting, I would repeat the same action (breaking bottles / popping balloons / dropping objects in water / …) while my camera was on burst mode. Shooting at 7 …

Project  Hydroponics

Hydroponics

“Automatic plant growth model. Hydroponics is a type of soil less agriculture. Soil looses its nutrients and fertility with time, so to avoid that we can use Hydroponics. Plant growth and nourishment can be improved and control too. Plant which …

A PWM Dimmer Revisited

“This project revisits one of the (inspirational) earlier projects of dyi_bloke: the “AC PWM Dimmer for Arduino”. There were a number of things in the original design that I wanted to understand in detail and a couple of things I …