LDR

A photoresistor is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity; in other words, it exhibits photoconductivity. A photoresistor can be applied in light-sensitive detector circuits, and light-activated and dark-activated switching circuits.

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Photoresistor Arduino Midi Theremin

“I call it the C041D-2020 I made this during the second COVID lockdown in UK, from ideas borrowed from about 5 other projects I found here on Instructables and also on Youtube. As you can see from the video …

Plant translator

“Using Wio terminal and sensors. New inspiration I’ve been using some of my spare time to design boards, testing garden and weareable electronics and testing things I had in my lab, in order to slowly have fun again with …

Payment Terminal for the Visually Challenged

“Aim of this project is to improve the experience of the visually challenged, while making cashless transactions in public. What is a payment terminal?A point of sale terminal (POS terminal) is an electronic device used to process card payments …

Night Light Motion & Darkness Sensing - No Micro

“This instructable is about preventing you from stubbing your toe when walking through a dark room. You could say it is for your own safety if you get up at night and try to reach the door safely. Of course …

DIY solar tracker

“This system can track the sun all day long, can be used for harvesting 15% more energy than typical static Solar Plates. When we use typical static solar plates, a great amount of solar energy is wasted because of the …

IoT Based Smart Irrigation System Using NodeMCU ESP8266 & Adafruit IO

“Farmers across the world face a lot of difficulties in growing crops because of unpredictable weather conditions and shortage of water. The traditional irrigation system uses a large amount of water and supplies uneven water to corps. This affects the …

Home Automation with NodeMCU LDR Temperature Control Relay

“In Manual Mode, control the relay module from Touch Switch & Blynk App. In Auto Mode, DHT11 & LDR will control the Relays Automatically. In this IoT based home automation project, I have made home automation using Blynk & NodeMCU with Touch Sensor …

WiFi NodeMCU ESP8266 Google Clock

“A simple easy WiFi clock using “Google” timestamp, with temperature and humidity. Oct2020 update: bug fixing and automatic brightness I made several clock with arduino but was looking simple, easy, light, synchronized in real time with internet clock different than …

Data Transfer Using LED Light (Li-Fi)

“DIY light based transmission between two Arduinos using LED and LDR with custom communication protocol. I wanted to transfer data between two arduinos wirelessly using an unconventional method. I decided to use a LED as a transmitter and receive the …

7 Segment Clock Version 2

“Hello! After a request from Instructables user regarding availability of 12h format, i took advantage to make substancial changes to the original project. During using of the version 1 i felt the need to make a stand-alone version, so I …