Joule Thief circuit as a battery charger

This channel selector selects video and stereo audio from any one of three different sources. The circuit should be constructed on a PC board with plenty of ground plane to minimize noise. The channel selector circuit is designed to facilitate...

This innovative buzzer circuit incorporates a relay connected in series with a small audio transformer and a speaker. When the switch is activated, the relay is energized through the primary winding of the transformer and the closed relay contact....

This circuit is designed for use in a hi-fi showroom, allowing for the selection of different speakers to connect to a stereo amplifier for comparative listening. It can also serve similar applications where only one device from a set...

The basic two-transistor flasher has become widely utilized in various applications due to its simplicity and versatility. It has been employed in circuits such as a micropower low battery indicator, a lightning detector, an off-line switching power supply, a...

The circuit element appears to be problematic, particularly with the Shu component. After a prolonged period following the activation of the start button, there are indications of unexpected behavior, such as the turtles producing sperm-like substances. The Pi Wen...

A steam engine powered carousel project that utilizes the Joule Thief circuit. The project involves the design and construction of a carousel that is powered by a steam engine, showcasing the principles of mechanical motion and energy conversion. The Joule...