Super-Clean 9VDC Power Supply Circuit

super-clean 9VDC power supply
This circuit will give you a 9V regulated DC voltage at maximum current of about 1A. The circuit uses stepdown tansformer with secondary output voltage of 25V AC and 1A current. The primary voltage depended your home electrical power line installation. If your power line voltage is 110V then you must find transformer 110V primary voltage. The diode can be 4 pieces of 1N4002 (1A rectifier diode) or a 1A bridge diode.

Circuit notes:
274    2k
R1   = r1a || r1b = 241 ohms
R2   = r2a || r2b = 1456 ohms
Vref = 1.25V
ladj = 50uA
Vout = Vref(1+r2/r1)+ladj*r2 = 9.35VDC

Super-Clean 9VDC power supply circuit designed by Rick Barker, you can download the circuit in PDF document HERE

Power supply is an electronic device that supplies electric energy to an electrical load. The primary function of a power supply is to convert one form of electrical energy to another and, as a result, power supplies are sometimes referred to as electric power converters. Some power supplies are discrete, stand-alone devices, whereas others are built into larger devices along with their loads. Examples of the latter include power supplies found in desktop computers and consumer electronics devices.


Tags: 9vdc clean power supply LM317T regulated power supply LM317T regulator regulated power supply circuit

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