Electronic circuits cannot function without a proper power supply and a good power supply ensures stable and reliable circuit performance. Power supply is one of the most important sections in any electronic system and many electronic circuits need both positive and negative voltage, for example, operational amplifier circuits, audio circuits and analog circuits need dual […]
Transistor Circuits
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 needs clean and stable power and without good voltage our circuit will not work properly, sometimes it restarts and sometimes it gets damaged. But AC mains voltage is high and unstable, therefore, we cannot use it directly, but for that first, we must convert it and then, we must control it. Many […]
5V High Current Power Supply Circuit using IC 7805
The 7805 is very popular voltage regulator IC, as it gives fixed 5V output and is easy to use. But it has one problem the output current is limited, because it normally gives around 1A maximum current. Sometimes we need more current for our motors, relays or microcontroller project with many modules. To solve this […]
0-20V Regulated Power Supply Circuit using Transistors
Power supply is very important in electronics, because every circuit needs proper DC voltage. Sometimes fixed voltage is not enough and therefore, adjustable voltage supply is required. This 0-20V Regulated Power Supply Circuit using Transistors is simple and is with low cost. Also it uses easily available components, so beginners can build it easily and […]