POWER-PSD15.  Dual Output 15 & -15 Voltage DC power supply board/Regulator Interface board.


the POWER-PSD-15 is an Electronics board that allows you to connect 24V AC Center Trace (TC) or +/-17 to +/- 24VDC on one side of the board and get dual regulated voltages, 15VDC and -15VDC  on the other side. Every industrial application designer should have a few of these boards handy. The boards will allow you to easily power all your Industrial Op-Amp transducers. The Terminal Block TB connector is included and makes it easy to use. 


The POWER-PSD15 board is designed to convert low voltages Ac or DC to stabilize +/- 15V DC. If used properly, it will eliminate the need for expensive industrial power supplies, which would otherwise be needed to carry out the same task.


POWER-PSD15 is easy to install, setup and operate. If you want to  professionally power your HVAC products, POWER-PSD15 offers the features you need. Mounted easily via three 0.125" mounting holes.


The board is designed to attenuate, filter and regulate low voltage DC or AC to stable +/-15V DC. Commonly utilized as the heart of DC Power Supply for Amplified and In-Line Amplified Transducers.


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      Standard Board               With optional high-current configuration


Commonly utilized as the heart of DC Power Supply for Amplified and In-Line Amplified Transducers.


Basic operation of the voltage regulator board


The diodes bridge D1-D4, together with the capacitor C1-C4, will convert input dual AC voltages to dual DC voltages. Additionally, the diode bridge ensures that the polarity of the bridge output remains the same, regardless of the input voltage polarity.


The other side of the diodes bridge drives the voltage regulators U1 and U2. The voltage regulators are the main component of this kit (regulators). Usually having three legs, it converts varying input voltages and produces a constant regulated output voltage. They are available in a variety of outputs. The most common part numbers of the regulator starts with the numbers 78 or 79, and finish with two digits, indicating the output voltage. The number 78 represents positive voltage, and 79 a negative one. The 78XX series of voltage regulators are designed for positive input. And the 79XX series is designed for negative input. The LM78XX and the LM79XX series typically has the ability to drive currents up to 800mA. Application requirements up to 150mA, 78LXX and 79LXX can be used. As mentioned above, the component has three legs: Input leg which can hold up to 36VDC (we recommend not to exceed 24V), Common leg (GND) and an output leg with the regulator's voltage (positive voltage for the LM78XX and negative for the LM79XX). For maximum voltage regulation, adding capacitors C2,C5 and C3,C6 correspondingly in parallel between the common leg and the output is usually recommended. C3,C6 a 0.1MF capacitor is used. This eliminates any high frequency AC voltage that could otherwise combine with the output voltage. See below circuit diagram for the kit.


Final Note: As a general rule the input voltage should be limited to 2 to 3 volts above the output voltage (LM78XX series) and 2 to 3 volts below the output voltage (LM78XX series). The LM78XX series can handle up to 36 volts input and the LM79XX -36 volts, be advised that the power difference between the input and output appears as heat. If the input voltage is unnecessarily high, the regulator will overheat. Unless sufficient heat dissipation is provided, through heat slinking (optional), the regulator will shut down.


Due to the regulator construction difference, use dual heat-sink (optional if needed), one for the LM78XX, and one to the LM79XX.











Transformer with central tap (CT) configuration, see schematic below.




Simply connect our dual output transformers board together with our dual DC output power supply board (shown below) to get +/-15V DC 





Dual AC (VAC-1 and VAC-2) convert to -15VDC and +15VAC with common ground


POWER-PSD15 Features


  • Up to 800mA output.

  • +/-5% voltage stability.

  • Power switch option.

  • Generally powered from any power source, Dual AC or DC, that is larger then 2 volts of the desired +/-15VDC output voltage.

  • Also, designed to operate from three +/- 24VDC batteries


  • Input voltage                           15-30V AC or DC

  • Relative Output voltage stability  +/-5%

  • Output current                         Up to 150mA, higher output current models are available.

  • PCB material                             FR4

  • Output Voltage                         +/-15VDC

  • Max power consumption             5W

  • Storage temperature                 40 - 70   [F]

  • Operating temperature               32 - 140 [F] (0 to 60C) @ 95% RH

  • Low board DC voltage                29[V] max

  • Manufactured                           100% in USA



* Prices, P#, SKU# and colors are subject to change without notice. 

15VDC and  -15VDC PS, low current. Input up to +/-36V AC/DC, outputs  +15V /150mA & -15V /150mA

Description and SKU#



15VDC and  -15VDC PS, low current. Input up to +/-36V AC/DC, outputs  +15V /150mA & -15V /150mA






Flat configuration option addition.






Power switch addition.