Symmetric Power Supply for Op-Amp Applications by 78xx and 79xx
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Description:
This is a symmetric supply that can be used to power operational
amplifier used circuits. You should be carefull during using this power
supply since it has no short circuit protection. On the other hand you
can connect appropriate diodes to protect the circuit.
78xx and 79xx series regulators
are used. xx denotes which voltage value is required at the output and
xx value must be same for both ICs. J1,J2 and J3 are the transformer
output connections. J2 must be connected to the middle output of the transformer.
Parts List:
| BR |
1A Bridge Rectifier |
C1,C2
|
100uF / 35V
|
R1,R2
|
100 KOhm
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U1
|
78xx ( 7805 – 7809 – 7812 – 7815 – 7824...) |
U2
|
79xx ( 7905 – 7909 – 7912 – 7915 – 7924...) |
C3,C4
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100n |
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