Hi,
Trying to simplfy a psu (shown in the image). The supply is 240VAC @ 50Hz (UK Mains) and the output is 5vdc @ aprox. 100mA.
I thought of using some sort of line attenuator / zenner arrangement that will replace the expencive and bulky transformer, to directly derive about 24Vdc from the bridge diodes for the input of the VReg.
Is this possible? the 5V output must be provided by a vreg becuase it needs to be stable for a uProcessor is attached to it.
Can anyone come up with some design ideas / circuits?
Joe
Trying to simplfy a psu (shown in the image). The supply is 240VAC @ 50Hz (UK Mains) and the output is 5vdc @ aprox. 100mA.
I thought of using some sort of line attenuator / zenner arrangement that will replace the expencive and bulky transformer, to directly derive about 24Vdc from the bridge diodes for the input of the VReg.
Is this possible? the 5V output must be provided by a vreg becuase it needs to be stable for a uProcessor is attached to it.
Can anyone come up with some design ideas / circuits?
Joe