An optocoupler is a simple electronic component that is used to connect separate circuits together by the means of a light-sensitive optical interface. An optocoupler or optoisolator consists of a light emitter, the IR LED, … Read more
pc817
In this tutorial, we are making a circuit of a Simple magnetic pulse counter using a hall effect sensor. This circuit is simple and easy to make as it uses only a few numbers of … Read more
Magnetic Pulse Counter Using US1881 Hall Effect Sensor
In this tutorial, we are making a very simple and useful project of a Telephone ring detector circuit. The purpose of this circuit is to activate a loud buzzer when the phone rings or it … Read more
Telephone Ring Detector using PC817 Optocoupler
In this tutorial, we are making a very useful and interesting project of an Object counter. This circuit is simple and uses an LDR, a laser light, a PC817 photocoupler, an 8-digit inexpensive calculator, and … Read more
Object Counter with PC817 Opto-coupler
What is an Optocoupler Tester? An optocoupler is a simple electronic component that is used to connect separate circuits together by the means of a light sensitive optical interface. An optocoupler or optoisolator consists of … Read more
How To Make an Optocoupler Tester Circuit At Home
In this tutorial, we are going to make a circuit of the Optocoupler Relay Driver. Optocouplers are electronic components that are used to transfer electrical signals between two isolated circuits by using light.They prevent high … Read more
Optocoupler Relay Driver with PC817 & 2N3904
In this circuit, we are making a 555 Universal Automatic Battery Charger. Any type of rechargeable battery having voltages ranging from 6 to 24V can be charged with this circuit. The output current of this … Read more
555 Universal Automatic Battery Charger
A solid-state relay is designed for the purpose of switching a DC or AC load, some of them are capable of switching both AC and DC loads. Their output (AC, DC, or AC/DC) depends on … Read more
12 Volt DC Solid State Relay using BUZ71A
In this tutorial, we are going to demonstrate an easy and interesting DIY project that is a sound-activated switch. This circuit can activate a relay switch for a couple of minutes when any sound is … Read more
Sound Activated Switch Using LM386 & PC817
In this circuit, we are going to develop a “Power Outage Time Estimator”. Power outages are due to freezing rain, hail storms, and additionally high breezes that harm electrical cables and equipment. Most power outages … Read more
Power Outage Time Estimator using 555 Timer & PC817
This basic automatic emergency light will automatically get actuates when the mains power goes off. The circuit is economical and uses a few parts and it is likewise a better and longer life. An Automatic … Read more