Joule Thief intresting Circuits

The frequency of a crystal-controlled oscillator is maintained with high precision through the use of a quartz crystal. The frequency is primarily determined by the dimensions of the crystal, particularly its thickness, while other circuit parameters have minimal impact....

The concept of a capacitor bank involves charging a significant amount of energy to create a short circuit through various conductive materials such as small coils, aluminum foil, steel wool, and wire. The short circuit current generated is extremely...

The LA4440 is a two-channel audio power amplifier integrated circuit (IC) designed for stereo and bridge amplifier applications. In dual mode, it provides an output of 6 watts per channel, while in bridge mode, it can deliver up to...

A simple blocking oscillator circuit can be utilized to increase voltage by leveraging the properties of coil inductance (V = L di/dt). Such a circuit is illustrated in Figure 1. The blocking oscillator circuit is a type of oscillator that...

The LED flasher circuits below operate on a single 1.5 volt battery. The circuit on the upper right uses the popular LM3909 LED flasher IC and requires only a timing capacitor and LED. The top left circuit, designed by...

Transistor amplifier circuits that are simple and easy to construct. This includes a headphone amplifier, a four-transistor amplifier, and a low-power amplifier. Transistor amplifier circuits are fundamental components in electronic design, offering various applications ranging from audio amplification to signal...