Is it possible to design a very basic linear regulated power supply that can control an output of 13 volts? I ask because doing a thorough research online leads to very complicated designs.
You can easily make a 13V low current linear regulated power supply with the LM317. The LM317 is a programmable regulator that has the output voltage set via a pair of resistors that form a divider from the output to GND. A simple power supply would consist of these two resistors and two capacitors, one at the input and one at the output. The following picture shows the circuit for an LM317.
For a 13V output you will want an input voltage 16V or more. A typical current value to use for the IADJ is 50uA as can be determined from the part data sheet. For a 13V output you can use the formula in the picture to get the resistor values. If you use precision values of R1=274 ohms and R2=2550 it is possible to achieve an output of almost exactly 13V when the IADJ value is 50uA.
From the question, and comments by the OP to another answer, the requirement appears thus:
- 230 Volts AC main line power as input
- 13 Volts DC regulated 1 Ampere as output
A suggested practical solution with minimal complication is as follows:
- Use a wall wart or laptop brick power supply with 15 to 18 Volts DC output, rated for 1.5 Amperes or thereabouts. Regulation quality is not critical.
- Use an adjustable linear voltage regulator circuit such as the LM317 suggested by @MichaelKaras in another answer, to obtain the regulated 13 volts output. Using a suitable heat sink on the LM317 is recommended.
- The LM317 has a drop-out voltage at or under 2 volts for 1 Ampere load, under normal working temperatures, so this will work with a 15 volt input.