This LM7812 power supply can deliver up to 30A to the load by the help of the TIP2955 pass transistors. Each transistor can handle up to 5A and six of them result an total output current of 30A. You ...

This circuit provides ±12V regulated DC output based on LM7812 and LM7912 that are National Semiconductors’ two of the most popular positive and negative three terminal voltage regulators. The circuit ...

Fig. 2: Circuit diagram of the audio amplifier This audio amplifier with dual power source operates at 12V DC, which can be derived in two ways. The first uses a 230V AC primary to 15V, 1A step-down ...

Arduino based Fire Alarm – Circuit and Working Fig. 2 presents the circuit diagram for the fire alarm using a flame sensor and Arduino Nano. The system is powered by a step-down transformer (X1), a ...

And infrared alarm is a kind of stable and efficient alarm. The design of infrared alarm is composed of three main circuits: the three-terminal voltage regulator LM7812 and LM7912 ± 12V DC voltage ...