12V Regulated Power Supply Using LM317
There are many ways to obtain a very stable voltage for 9 to 12v regulated power supply which has very minimal distortion. If you really love in the audio field, you must have a power supply at the level of the OP Amp should be free from hum. Use of Power Supply which has a higher stabilization and free of humming and buzzing frequently encountered in the use of communication tools such as Handy-talkie and radio transmitters.
To overcome the above problem, we have to provide the filters on the power supply using IC regulator. You can use the LM 7809 or you can also use the regulator IC LM 317. This regulator has advantages over the use of IC 78XX. LM317 has a nature that is at the Gate (no.1 feet) can be tuned to provide feedback which is inversely proportional to the value of R (resistor). The R value can affect the output voltage on pin 2(V-out), pin 3 as input (V-in). The function R can be replaced with a variable resistor, but you must have an indicator meter to test power supply or AVO meter to ensure that the output voltage is true 9 Volt. If you've found your desired voltage, for example 9VDC, then you can connect to the component that you want to turn on. So first set the output voltage using a volt meter before connecting to the equipment to be you turn on.
KA317 / LM317 is a Three Terminal Positive Adjustable Regulated integrated circuit, the monolithic characteristic adjustable positive voltage regulator designed to supply more than 1.5 A of load current with output voltage can be adjusted with a range capability 1.2 V of up to 37 V. This tool will work for internal current limiting, thermal shut-down and securing the compensation scope. You have to use aluminum as an additional cooling.
220V - 240V to 12V DC Power Supply
This circuit will deliver 12V Regulated DC Power Supply with voltage at maximum current of about 2A. The circuit uses a transformer with a secondary output voltage 12-24V AC/1A. To give input in Primary of transformer, it’s dependent electrical conduit installation in your home. If the mains voltage 240V and then you have to find a 110 V in transformer primary voltage. We need a transformer and diode to reduce voltage 240 to 12V DC Power supply to the scheme here.For the diode, you can use 4 pieces diodes 1N4002 (2A rectifier diode) or better by using a diode bridge 2A.
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| 9 to 12Volt DC Power Supply Using LM317 Regulator |