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0:02:36

Great Idea / How to Use an Optocoupler INSTEAD OF LDR

0:02:52

Human Detector Circuit

0:04:26

This tool you will need for testing, zener diode,LED light, voltage regulator

0:02:46

An extraordinary automatic light control circuit

0:08:01

Electric Mouse Trap / Best Electric Mouse Trap / Electronic Rat Trap / Mouse Sounds

0:05:33

How to Make Adjustable Precision Temperature Control Circuit with LM358 Integrated Circuit

0:01:39

FREQUENTLY USED TOOLS!!! Making a 12V Power Supply Without a TRANSFORMER

0:03:46

How to Make Simple Voltage Regulator | 0 to 50v 3A current

0:02:49

How to Make a Simple Timed Flasher Using a Relay / No Integrated No Transistor

0:04:37

Don't Throw That Old LED Bulb Away! This Tool Should Be in Every Home

0:03:13

Protect Your Home: How to Easily Make an Ultrasonic Pest Repeller

0:04:26

You've Never Seen This Before, Great Idea PC817

0:03:01

How to Make Transistor at Home / NPN & PNP

0:03:09

How to Make 10 Step LEDs Chaser Using ic 4017 Only Without PCB Board

0:01:27

How to Make a Zener Diode at Home / Homemade Zener Diode

0:02:20

This Tools Should Be in Every Home/How to make a diode tester

0:03:25

Amazing!!! Put Salt on Your Electrical Soldering iron and Admire The Results

0:01:36

How To Make This Unique Voltage Regulator..You Never Seen This Type Of Voltage Regulator Circuit

0:02:11

3.7V Automatic Cut Off Battery Charger | 3.7 Volt Battery Charger

0:02:17

[NEW] Top Useful Electronics Project use NE555 Timer ic, Diy Projects

0:05:51

3 Simple Inventions With 7 Segment Display

0:01:42

BD 139 Transistor| LED Flasher Circuit | Transistor Projects | BD139

0:03:09

Charge Different Batteries with TP4056

0:03:00

Inspire Award Project | How to make Automatic Fire Extinguisher without Arduino