A Superpower Supply
Many of you have built your own power supplies. Here is a buy and assemble kit, given as a PCB file, a parts list and a schematic, to serve as a starting point or final hardware for either a dual positive supply or a positive and negative supply. It's configured with the regulators at the card edge to allow them to be easily attached to heat sink(s).
The PCB, supplied as an ExpressPCB file, can fit either a Triad or Amveco toroid. The regulator connections are for LM78xx and LM79xx for positive and negative output, so you can use this with Superpower two SPJ78s or one SPJ78 and one SPJ79. Or you can go cheap and use standard monolithic devices. Either transformer can be wired with secondaries in series to increase (double) Vrms, note that this limits the circuit to a single output.
The two circuits have isolated ground reference connections that can be tied together at the load to prevent ground current cross–talk between the two power supplies.
Positive+Negative Superpower Supply Schematic
Dual Positive Superpower Supply Schematic
Positive + Negative PCB
Dual Positive or Positive/Negative Supply
We offer two different PCBs, one with dual positive supplies and one with positive and negative supplies. Both use dual primary/dual secondary toroidal transformers. The dual primary allows 120V input (inputs in parallel) or 240V input (inputs in series). The PCBs are 2.5x3.8 inches each.
Dual secondaries can be connected in series for higher voltage or in parallel for higher current. If the secondaries are placed in series, only a single supply can be built. Two transformers are in the parts list, the Triad can be used for dual outputs at 2A each, with regulated Vout between 3.3V and 7V (positive or negative depending on your selection). At 3.3V out, the regulator(s) will dissipate 10W at 2A and thus the need for the heat sink you see in the photo.
Parts List
All parts except PCB, heat sink and Amveco transformer are available at http://www.mouser.com/, Amveco transformer available at http://www.digikey.com/, PCB and heat sink available from the links given.
Qty  Ref. Des.  Value 
Description  Part Number 
1  Positive+ Negative PCB from OSH Park  see text  Download Gerber/Excellon files (zipped) to order positive+negative PCB  After you download the zipped file, go to http://www.oshpark.com/ and submit it, you get 3 boards for about $48(US). 
1  Dual Positive PCB from OSH Park  see text  Download Gerber/Excellon files (zipped) to order dual positive PCB  After you download the zipped file, go to http://www.oshpark.com/ and submit it, you get 3 boards for about $48(US). 
1  Positive+ Negative PCB  see text  Download ExpressPCB file to order positive+negative PCB  Download PCB software from ExpressPCB and order, you get 3 boards for about $90(US). 
1  Dual Positive PCB  see text  Download ExpressPCB file to order dual positive PCB  The 3 boards must be the same, so you can't order dual positive and positive/negative together. 
1  SPJ78  *  Superpower voltage  SPJ78, specify voltage [note that standard LM78xx can be used] 
1  SPJ79  *  Superpower voltage regulator  SPJ79, specify voltage [note that standard LM79xx can be used] 
2  DB1,DB2  600VA 4A 
Genesic SiC bridge rectifier  KBL406G 
2  C1, C2  0.01?F 
Kemet Film Capacitor 63volts 0.01uF 10% LS=5mm  SMR5103K63J01L4BULK 
2  C3, C4  10000?F 
Nichicon Audio Grade  UKA1C103MHD 
1**  Transformer  Regulator Vout = dual 6V to 15V or bipolar up to +/15V 
max 1A per supply  Triad VPT241040 
1**  Transformer  Regulator Vout = dual 3.3V to 5V or bipolar +/5V 
max 2A per supply  Triad VPT122080 
1**  Transformer  Regulator Vout = dual 6V to 15V or bipolar up to +/15V 
max 400mA per supply  Amveco 70042K 
1 
Connector Plug 
Omron I/O Connectors 4P CABLE PLUG CONN 2820 AWG  XN2A1470  
1 
Connector Socket 
Omron I/O Connectors 4P CABLE PLUG CONN 2820 AWG  XN2D1471 

2 
R1‡, R2‡ 
Static Load Resistor 
Static load to improve transient performance 
Select a value Vout/0.015 to draw 15mA from the regulator 
2 
C5‡, C6‡  100µF  Nichicon 50V capacitor, add this capacitor to the load circuit PCB  UVR1H101MPD 
1  Heat sink  2.5"/ 63mm, height 0.8"/ 20mm, depth 1.5"/ 37mm 
Sunetec SS314 Aluminum Black Heatsink Heat Sink 
SS314 (from Hong Kong via eBay) 
1  Positive+Negative Schematic  Download positive+negative supply schematic)  DipTrace Schematic for Positive+Negative Superpower supply  
1  Dual Positive Schematic  Download Dual positive supply schematic)  DipTrace Schematic for Dual Positive Superpower supply 
*For dual positive supply, get two SPJ78 positive Superpower
regulators with Vout as needed.
For positive/negative supply, get one SPJ78 and one SPJ79.
** Order the transformer that meets your Vout and power (VA) needs.
Select transformer voltage rating (either in series or parallel) above
and close to [(Vout + 1) /√2
]. Use our Transformer
Calculator page to determine your transformer VA and voltage
needs.
Choose a transformer that fits on the PCB! For a given size, the Triad
has more VA capability.
‡ These components are not on the Superpower Supply, they are mounted on the load circuit (your DAC or preamp or mixer or whatever).