# +12 Volt DC to -12 Volt DC

#### kavin6995

Joined Jul 9, 2018
11
Hi,
I am testing a project in that i have to convert or seperate +12v battery voltage into +12v and -12v... If there is any device or IC for it please suggest.
Thanks.

#### ericgibbs

Joined Jan 29, 2010
9,346
hi kavin,
Welcome to AAC.
What sort of current levels are required for the +/-12 Vout.?
E

#### kavin6995

Joined Jul 9, 2018
11
1 - 2 Amps

#### kavin6995

Joined Jul 9, 2018
11
Another one important thing here i am hoing to give the -12 and +12 as a pulse for 2 devices in a single time throught the battery

#### kavin6995

Joined Jul 9, 2018
11
I am going to install two devices in a car.. one device needs +ve pulse and second need -ve pulse.. for the pulses i am going to take supply from the battery... For giving pulses i will fix a single push button in the car... if i press the push button both the device should get the pulses.

#### ericgibbs

Joined Jan 29, 2010
9,346
Why don't you use the 12V car battery as the +12V pulse source and purchase an isolated +12Vby to -12V converter for the -12V pulse.?

#### kavin6995

Joined Jul 9, 2018
11
Ok...its fine... but if there is any simple solution for it... like using any diode or ic

#### ericgibbs

Joined Jan 29, 2010
9,346
hi,
The problem is to convert from an isolated +12V to a -12V at say 2Amps will require additional circuitry, not just the switcher IC.
You can buy ready built modules from eBay etc... I will check it out and post.
E

#### kavin6995

Joined Jul 9, 2018
11

this is the circuit what is the solution

#### kavin6995

Joined Jul 9, 2018
11
Ok but dont need for amps rating first tell me a solution for the conversion for voltage

#### ericgibbs

Joined Jan 29, 2010
9,346
What is the -12V pulse driving.? and is one connection of the device being pulsed, connected to the vehicle chassis.?

#### kavin6995

Joined Jul 9, 2018
11
Sorry... i cannot understand

#### ericgibbs

Joined Jan 29, 2010
9,346
What is the -12V pulse output connected too.?

#### kavin6995

Joined Jul 9, 2018
11
to a device for giving tigger to it

#### ericgibbs

Joined Jan 29, 2010
9,346

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#### kavin6995

Joined Jul 9, 2018
11
The device may like DVR or GPS units or like some sensors

#### MrChips

Joined Oct 2, 2009
19,923
The simple solution is to get a second 12V battery.

#### kavin6995

Joined Jul 9, 2018
11
By using zener diode if there is any option

#### ericgibbs

Joined Jan 29, 2010
9,346
A zener is not an option for the -12V.
To get a circuit design, you need to have a clear specification of the requirements of your project.