I have a circuit running off a LM7815 voltage regulator. On the Input side I have a bridge rectifier because my supply is from a 24VAC toroidal transformer.
The input voltage to the regulator is therefore 24V-1.4V = 22.6VAC...so far so good.
However the output voltage is 12.6 volts but I don't understand why.
If I connect a DC bench power supply to the bridge rectifier AC side the regulator gives 15VDC output as expected....so what is the toroid doing to my regulator?
For reference the output of my regulator is driving a 115mA load.
The input voltage to the regulator is therefore 24V-1.4V = 22.6VAC...so far so good.
However the output voltage is 12.6 volts but I don't understand why.
If I connect a DC bench power supply to the bridge rectifier AC side the regulator gives 15VDC output as expected....so what is the toroid doing to my regulator?
For reference the output of my regulator is driving a 115mA load.