Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Testing reverse input for DC power supply

Status
Not open for further replies.

x2pher

Newbie level 4
Joined
Jun 4, 2008
Messages
7
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
cebu, Philippines
Activity points
1,343
Hi All,

can you help me please to provide schematic for this. I Need to test reverse input for dc power supply.But I need to make sure the power supply doesnt have charge before I inject reverse voltage.please help to provide schematic,, need to discharge first the pre-voltage on the bulk caps.thanks
 

Attachments


betwixt

Super Moderator
Staff member
Joined
Jul 4, 2009
Messages
14,797
Helped
4,832
Reputation
9,682
Reaction score
4,617
Trophy points
1,393
Location
Aberdyfi, West Wales, UK
Activity points
125,978
Re: reverse voltage test

The simplest way would be to use a two pole relay and some load resistors. Arrange it so the load resistors are connected across the outputs when the relay is not energized so some leakage current flows and discharges the capacitors. When energized, use the relay to disconnect the resistors and connect the output wires instead.

Brian.
 
  • Like
Reactions: x2pher

    x2pher

    points: 2
    Helpful Answer Positive Rating

x2pher

Newbie level 4
Joined
Jun 4, 2008
Messages
7
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
cebu, Philippines
Activity points
1,343
Re: reverse voltage test

Hi brian,

Thanks for the help.
thats a great option, but it requires another supply for relay bias right.
Can a combinational transistor can do this. i just dont have any idea on the configuration.
thanks
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top