Many electronic circuits require a power supply and operate on low DC voltages such as 5V, 9V, or 12V., a transformer normally steps down the high AC voltage; however, it increases the cost and size of the power supply. Therefore, many small circuits use transformerless power supply and this type of supply directly converts high […]
Voltage Regulator
5V Transistor Based Low Dropout (LDO) Voltage Regulator Circuit
Voltage regulator plays a very important role in electronics circuit, because many devices need stable DC voltage, but sometimes input voltage is only little higher than output voltage, so in this case normal regulator does not work properly. Therefore, we have used a LDO regulator, LDO means Low Dropout Regulator and it can regulate voltage […]
9V 2A to 3A Transistors Based Regulator Circuit
When our project needs real power then normal adapter is not enough, sometimes battery drains fast and cheap adapters fail; Therefore, this 9V 2A to 3A Transistors Based Regulator Circuit is best solution, with strong output, smooth DC and long life performance. However, battery is not good for high current load, so we used transformer […]
Zener Controlled 9V Regulator Circuit with TIP41 Transistor
Every electronic project requires clean and stable power because a circuit cannot operate properly without a reliable voltage supply. An unstable power supply can cause the circuit to restart unexpectedly or even damage its components. Since AC mains voltage is high and unstable, we cannot use it directly, instead, we must first convert it to […]
5V High Current Power Supply Circuit using IC 7805
The 7805 is a popular voltage regulator IC because it provides a fixed 5V output and offers easy operation; however, it can deliver only about 1A of output current, which limits its use in high current applications. Sometimes we need more current for our motors, relays or microcontroller project with many modules, so to solve […]
6V to 15V Op-Amp Based Power Supply Circuit
In this project, we build one 6V to 15V Op-Amp Based Power Supply Circuit, as this circuit, give output voltage from 6V up to 15V and its current can go near 2A, because we are using 741 op-amp and 2N3055 power transistor. So output become stable and also, strong for load. The circuit is simple, […]