Hi,
Just built this simple board from China. For testing it's connected to a 12 VAC transformer on one of the AC connections and ground. I set the regulators for +12V (LM317) and -12V (LM337). This works fine.
I guess this board is supposed to be used with a transformer having two 12 volt windings (or a 24 Volt transformer with a center tap). Is (2x) 12VAC enough to get a stable +/-12VDC or should I use a transformer with a higher secundary voltage?
Can anyone confirm this please?
Regards, Gerrit
Just built this simple board from China. For testing it's connected to a 12 VAC transformer on one of the AC connections and ground. I set the regulators for +12V (LM317) and -12V (LM337). This works fine.
I guess this board is supposed to be used with a transformer having two 12 volt windings (or a 24 Volt transformer with a center tap). Is (2x) 12VAC enough to get a stable +/-12VDC or should I use a transformer with a higher secundary voltage?
Can anyone confirm this please?
Regards, Gerrit
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