Circuit of an 11V power supply using LM7811 IC. LM7811 is a voltage regulator IC of LM78xx series available in TO220 package. The IC has many built in features like short circuit protection, over heat shutdown, internal current limiting etc. The circuit is using only few external components; the output
current of the circuit is upto 1A. The 230V to 12V transformer steps down the voltage from the main, the 2A diode bridge rectifies the voltage and 2200uF capacitor filters it and then LM7811 regulates this voltage to provide 11V DC output. The IC will become hot during the operation therefore it is advised to use a suitable heatsink with it.