i want to build a Pass B1 pre, this DAC (http://www.amb.org/audio/gamma1/ DAC), and this headphone amp (http://www.amb.org/audio/mini3/) - all in a single chassis.
PS requirements are:
B1 = 18-24V
DAC = 5V
HP amp = 9V
hanging 3 wall-warts off the rear chassis is not kosher.
i've only built HP amp kits and not "designed" anything like this before.
can i use a single 24V transformer (assuming appropriate current capability) with separate bridge rectifiers for each of the circuits? would the LM338 cicuit be an appropriate from Nuuk's D.D.: http://myweb.tiscali.co.uk/nuukspot/decdun/gainclone6.html.
any other options?
PS requirements are:
B1 = 18-24V
DAC = 5V
HP amp = 9V
hanging 3 wall-warts off the rear chassis is not kosher.
i've only built HP amp kits and not "designed" anything like this before.
can i use a single 24V transformer (assuming appropriate current capability) with separate bridge rectifiers for each of the circuits? would the LM338 cicuit be an appropriate from Nuuk's D.D.: http://myweb.tiscali.co.uk/nuukspot/decdun/gainclone6.html.
any other options?
not sure why the D.D. link didn't work. let's try this one:
http://myweb.tiscali.co.uk/nuukspot/decdun/gainclone_psu.html
i'm looking at building a regulated rectifier bridges.
http://myweb.tiscali.co.uk/nuukspot/decdun/gainclone_psu.html
i'm looking at building a regulated rectifier bridges.
From the schematic, the amplifier can operate on 12v. The DAC uses 5v. The preamp (is it even necessary? modern DACs have internal buffers) only uses a small amount of current.
A power supply originally intended for powering a CD-ROM or external hard drive or something should work fine for the amplifier and DAC. Add an auxiliary winding to boost the 12v for the preamp.
A power supply originally intended for powering a CD-ROM or external hard drive or something should work fine for the amplifier and DAC. Add an auxiliary winding to boost the 12v for the preamp.
thanks!
so basically, i need to rectify the AC from the transformer, then add a LM317 voltage regulator for each powered circuit based on this schematic from the datasheets: http://www.national.com/mpf/LM/LM317.html#General Description
i have the NEETS modules and need to study PS design. i'll see what i can get through tonight.
so basically, i need to rectify the AC from the transformer, then add a LM317 voltage regulator for each powered circuit based on this schematic from the datasheets: http://www.national.com/mpf/LM/LM317.html#General Description
i have the NEETS modules and need to study PS design. i'll see what i can get through tonight.
It would be very inefficient to just linear regulate 24+v to 5v. Use a separate winding or use the center tap. Or use a switching regulator if you don't know how to design a high voltage switcher and do not want an off-the-shelf solution. (Check the off-the-shelf switching power supply solution, however, as it can often be cheaper than building your own power supply.)fishski13 said:thanks!
so basically, i need to rectify the AC from the transformer, then add a LM317 voltage regulator for each powered circuit based on this schematic from the datasheets: http://www.national.com/mpf/LM/LM317.html#General Description
i have the NEETS modules and need to study PS design. i'll see what i can get through tonight.
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