====== Power Supplies ======

Find Here some schematics for DIY Power Supplies. It could help to power your midibox !

<wrap>** :!: Be Aware of high voltages! - Stay Safe ! :!: **</wrap>

===== +5V DC / +9V DC / +12V DC =====

{{ :neonking:dcunipolar-5v-9v-12v.jpg?direct |}}

==== 5V Parts List ====

^ Description  ^ Type    ^ Qty ^ Designation ^
|LM7805        |VR       | 1   | U1          |
|1N4007        |Diode    | 4   | D1,D2,D3,D4 |
|220           |Resistor | 1   | R1          |
|22µF/25V      |Capa Elec| 1   | C2          |
|2200µF/40V    |Capa Elec| 1   | C1          |
|9VDC 15VA     |Transfo  | 1   | TR          |

==== 9V Option ====

Replace: 
  * U1 > **LM7809**
  * TR out> 12VDC
  * R1 > **390ohms**

==== 12V Option ====

Replace: 
  * U1 > **LM7812**
  * TR out> 12VDC
  * R1 > **510ohms**

===== -12V/+12V DC =====

A designed has been purposed [[http://www.midibox.org/dokuwiki/doku.php?id=bipolar_12v_psu|There]]

===== -15V/+15V DC =====

{{ ::neonking:dcbipolar.jpg?direct |}}

==== Parts List ====

^ Description  ^ Type    ^ Qty ^ Designation ^
|LM317T        |VR       | 1   | U1          |
|LM337T        |VR       | 1   | U2          |
|BDX54         |PNP      | 1   | Q1          |
|BDX53         |NPN      | 1   | Q2          |
|10A04         |Diode    | 4   | D1,D2,D3,D4 |
|10            |Resistor | 2   | R1,R5       |
|120           |Resistor | 2   | R2,R6       |
|820           |Resistor | 2   | R4,R8       |
|1320(1,1k+220)|Resistor | 2   | R3,R7       |
|1µF/25V       |Capa Elec| 2   | C2,C5       |
|22µF/25V      |Capa Elec| 2   | C3,C6       |
|10000µF/40V   |Capa Elec| 2   | C1,C4       |
|S05K400       |Varistor | 1   | VR          |
|15VDCx2 90VA  |Transfo  | 1   | TR          |

For Fine Voltage Tuning replace R3/R7 by a 2K Multi turns Trimpot.

===== Forum Threads =====

  * [[http://midibox.org/forums/topic/19108-simple-and-compact-512-12-psu-for-seqv4/|Compact PSU by Altitude]]