Every circuit needs stable DC voltage, because power supply plays a very important role in electronics. However, AC voltage comes from main supply, so we need to convert AC to DC. Therefore, this circuit uses LM317 to make adjustable DC power supply and output voltage can change from 1.2V to 30V, with maximum output current […]
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 […]
6V to 15V Op-Amp Based Power Supply Circuit
In this project, we build one 6V to 15V Op-Amp Based Power Supply Circuit. 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, good […]
38V Linear Power Supply Circuit using Transistors
Power supply plays a very important role in electronics. Every circuit needs stable DC voltage and sometimes we need high voltage like 38V DC, so this is the main purpose of this circuit. This 38V Linear Power Supply Circuit using Transistors uses 2N3055 and BD139 transistors. 2N3055 is very popular power transistor and it can […]
0-30V Transistor Based Variable Power Supply Circuit
This is 0-30V Transistor Based Variable Power Supply Circuit which gives adjustable output voltage and maximum current is around 2A. The main power transistor is 2N3055 and it works as series pass transistor in the circuit. Since, it is linear type regulator the output is smooth and stable. Therefore, it is good for lab testing […]