Hello everyone, in this video above we are showing how to make an automatic on and off timer, being a very efficient project and at the same time being very resistant... List of materials for the construction of this project: Two 5-pin 12V relays. Two 1M resistors in brown, black, green and gold colors. One 1K resistor in brown, black, red and gold colors. One LED in green color. Four 1N4007 diodes. Four BD139 transistors. One 22uF / 25V capacitor. One 47uF / 25V capacitor. One seesaw switch. Tin solder. Pieces of wire. Soldering iron. NOTE: In addition to the BD139 transistor, you can use others such as: BD135, BD137, BD226, BD375, BC637, BC639 among others... NOTE: The working voltage of the capacitors can be 16V, 25V or more, never less than 16V ok. The time that the timer will remain on and the time it will remain off will be determined by the capacitance value of the capacitors and the resistance value of the resistors... Subscribe to this channel and help us keep this channel alive if you want to make a donation the account number is: 14-656-0 Agency 1430-3 Banco do Brasil. Follow the link to the videos below: • 5-pin relay. How it works. How to connect ... 5-pin relay. How it works. How to connect 5-pin relay. • Homemade tool for electronics workbench. • HOW TO ASSEMBLE AN ELECTRICAL CIRCUIT? WITH... HOW TO ASSEMBLE AN ELECTRIC CIRCUIT? HOW TO USE PHYSICS IN ELECTRICITY? • GENIUS: CHARGING THE BATTERY. GREAT BATTERY... GENIUS: CHARGING THE BATTERY. GREAT BATTERY. • SENSATIONAL CIRCUIT PART 2...HOW TO M... SENSATIONAL CIRCUIT PART 2...HOW TO ASSEMBLE AN ELECTRIC CIRCUIT? • THE BEST OF THE LAMP IN SERIES. I didn't g... THE BEST OF THE LAMP IN SERIES. Don't forget to build yours. • THE BEST OF ELECTROMAGNETIC PHYSICS AND ... THE BEST OF ELECTROMAGNETIC PHYSICS AND MAGNETIC FIELD. • THE BEST OF THE LAMP IN SERIES ON THE PANEL. THE BEST OF THE LAMP IN SERIES ON THE PANEL. • PHYSICS AND THE PRINCIPLE OF ELECTRIC MOTORS... PHYSICS AND THE PRINCIPLE OF ELECTRIC MOTORS • BATTERY CHARGER. HOW TO MAKE... BATTERY CHARGER. HOW TO MAKE... • SUPER FLASHLIGHT. HOW TO MAKE? SUPER FLASHLIGHT. HOW TO MAKE? • HOW TO CONNECT LED IN 220V. DO IT YOURSELF. HOW TO CONNECT LED IN 220V. DO IT YOURSELF. • EDUCATING AND RECYCLING HOW TO DO IT? EDUCATING AND RECYCLING HOW TO DO IT? • How to assemble an electronic panel? How to assemble an electronic panel? • HOW TO EASY REPAIR LED LAMP. HOW TO EASY REPAIR LED LAMP • SPECIAL FLASHLIGHT, from scrap HOW TO RECYCLE WITH ELECTRONICS. HOW TO TAKE ADVANTAGE OF DEFECTIVE OBJECTS. • HOW TO INSTALL A HOTEL SWITCH OR PARALLEL SWITCH. • ACTIVATING A THREE-POINT LAMP ... ACTIVATING A DIFFERENT THREE-POINT LAMP. WITH INTERMEDIATE SWITCH. • CONNECTING LED IN 220V WITH ONLY THREE C... CONNECTING LED IN 220V WITH ONLY THREE COMPONENTS. • INSTALLING LED IN THE SWITCH. HOW TO D... INSTALLING LED IN THE SWITCH. HOW TO DO IT? • LED IN 127V OR 110V. DO IT YOURSELF. HOW TO INSTALL LED IN 127V OR 110V. DO IT YOURSELF • HOW TO ASSEMBLE AN ALARM CONTROL UNIT. DO ... HOW TO ASSEMBLE AN ALARM CONTROL UNIT. DO IT YOURSELF. • AMAZING ALARM CONTROL UNIT PART 2. HOW TO INSTALL AMAZING ALARM CONTROL UNIT PART 2. • ASSEMBLE YOUR ALARM CONTROL UNIT. Alarm ... ASSEMBLE YOUR ALARM CONTROL UNIT. • AMAZING OUTLET AND PROTECTION. Outlet and ... AMAZING OUTLET AND PROTECTION. Do-it-yourself outlet and filter Subscribe to this channel and help us keep this channel alive if you want to make a donation the account number is: 14-656-0 Agency 1430-3 Banco do Brasil.