Simple Regulated DC without Regulator IC, Yes here is the Simple Regulated DC supply circuit without any Regulator IC. Transistor 2N1613 gives Regulated DC supply from un Regulated DC input. Here Variable Resistor R2 Changes the output voltage and current levels.
Components List
| S.No | Name | Quantity |
| 1. | Diode 1N4007 | 4 |
| 2. | Capacitor 1000uF | 1 |
| 3. | Transistor(NPN) 2N1613 | 1 |
| 4. | Resistors 470R & 1K | each1 |
| 5. | Variable Resistor 10K | 1 |
| 6. | Stepdown Transformer 230V to 15V / 500mA | 1 |
In this circuit, R2 and R3 are resistors, and the values of these resistors determine the output voltage of the regulator circuit. Voltage across Variable Resistor R2 controls the base current of the transistor 2N1613, then it regulates the output voltage. The exact values of R3 and R2 depend on the desired output voltage and the load connected to the circuit. To calculate the specific resistor values, you need to know the desired output voltage (Vout) and the input voltage (Vin) and the current requirement of the load (I).