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Showing posts with label -12V 1A. Show all posts
Showing posts with label -12V 1A. Show all posts

Sunday, 22 January 2012

Power Supply +12V. -12V and +5V

02:21 Unknown 7 comments

Schematic
The application of this circuit is in the use of operational amplifiers which require multiple power supply +12 V and -12V. It also still provides a +5 V power supply for other circuits such as digital circuits.
A symmetric power supply mostly used in amplifiers. If you want to create a symmetric power supply with a current of more than 1 amp, you would just remove IC79** and IC78** (output current of this IC is 1 amp), replace D1, D2, D3, D4 with a diode bridge with a range 35A, and replace the capacitor by increasing the charge and voltage.


PCB layout
List of Components
Names
Value
  Quantity
Transformer CT
15V, 9V
1
Voltage Source
Diode
1N4002
6
Rectifier
Elco
2200 uF/ 16V
3
Filter
IC1
LM7805
1
Positive Voltage Regulator (+5V)
IC2
LM7812
1
Positive Voltage Regulator (+12V)
IC3
LM7912
1
Negative Voltage Regulator (-12V)

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