Content for Optocoupler

Optocoupler

An opto-isolator (also called an optocoupler, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal. Commercially available opto-isolators withstand input-to-output voltages up to 10 kV and voltage transients with speeds up to 25 kV/μs. A common type of opto-isolator consists of an LED and a phototransistor in the same opaque package. Other types of source-sensor combinations include LED-photodiode, LED-LASCR, and lamp-photoresistor pairs. Usually opto-isolators transfer digital (on-off) signals, but some techniques allow them to be used with analog signals.

IoT-based Home Automation with Google Home & Alexa

“How to make a FREE IoT-based Home Automation with Google Assistant & Alexa using ESP32. (Circuit + Code) In this ESP32 project, I have shown how to make an IoT-based Home Automation with Google Assistant & Alexa using ESP32 to control 3 home …

Vegetative State Self Watering Houseplant

“A houseplant that waters itself when the soil is dry. It also collects environmental data and sends that to the cloud for interpretation. I was tasked with creating a self watering houseplant. When the soil moisture sensor detects that the …

MIDIXCV - MIDI to Multiple Control Voltages Converter

“In 2021 I published a project about a MIDI to CV converter capable of generating up to four control voltages and four digital signals from MIDI messages. It was built around an Arduino nano and a MCP4728 DAC and has …

NodeMCU Home Automation Project With Cadio

“Make IoT-based Smart Home Automation using NodeMCU Cadio to control 4 home appliances from the Google Home, Amazon Alexa App, and Cadio. In this IoT project, I have shown how to make IoT-based Smart Home Automation using NodeMCU Cadio to …

Arduino Based AC Voltage Control using Zero Voltage Crossing

“Usually, our home appliances run on single-phase AC voltage. And in India usually, a house is supplied with single-phase AC voltage with a voltage range of about 220-240 volts at 50Hz(your supply may be different). AC voltage in its …

Digital Fan Regulator

“Control fan using any microcontroller. in one of our projects, we need to speed control of ceiling fan so we made a circuit. this circuit is divided in to two-part 1. zero-cross detector 2. trice circuit for control in the …

3D Printed Timelapse/3D Scanning Turntable

“An affordable Arduino Turntable designed for Time lapse photography. Changing the gearing and code it can also be used for Photogrammetry/3D scanning or Video. The turntable operates on the move shoot move principle in the Timelapse and Photogrammetry modes …

minimum effort ESP32-MIDI-Synth

“The ESP32-MIDI-synth is a minimum effort synthesizer. It consists of only 11 resistors, a 6N318 optocoupler, an ESP32 and some sockets. All of this is enough to make an 8 channel MIDI synthesizer. The tones are produced by …

Smart Water Meter

“This Smart Water Meter has an inductive proximity sensor connected to an ESP32 is programmed in ARDUINO and uses the BLYNK IoT platform. Story While energy prices are increasing every day, the prices of water are (still) moderate compared to …

Arduino DCC Decoder

“Modern model railroads are digitally controlled using a Digital Command Control (DCC) protocol similar to network packets. These data packets contain device address and instruction set that is embedded in the form of AC voltage and fed to train track …