The Yamaha AN1x Synthesizer mailing list

Thanks for that Jeff. ;-)

I've just got a new regulated 12v 1200mah PSU that was on sale at the local Maplins which I think should be ok.

Regards
Rob. 

Jeff <jf.serviere@...> wrote:                                  Rob Hill a écrit :
 
 >  I didn't get an original PSU with mine but the one supplied was a generic 11.5v 600mah. Is this correct for the AN1X? Whats the rating of the proper Yamaha PSU, the manual doesn't give anything away?
 > 
 > Regards
 > 
 > Rob.
 >  
 >
 The original power supply is rated at *12 V DC - 700 mA* . It is 
 unregulated (mains transformer followed by a rectifier bridge and a 
 capacitor).
 It's not far from yours .... i think the lack of maximum current could 
 be a problem, the 0.5 V no because there are internal voltage regulators 
 to provide the "right" voltages (i.e. 5 V DC for the logic circuits, 3.3 
 V for the static RAM battery ...) which are always lower than the input. 
 When you need higher voltages or split polarity supplies you will find 
 more or less integrated DC/DC converters with a step - up chopper 
 somewhere , or an oscillator driving a transformer . For example to give 
 the classic +/- 15 V for op-amps or D/A converters .
 Cheers
 J.F.
 
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