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Choosing the correct Mains Adaptor~Many pieces of portable battery powered equipment such as radios, tape recorders cassette players, personal stereos, calculators and electronics games offer the ability to be powered from MAINS power.~~~15102~15104~~

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Description~Many pieces of portable battery powered equipment such as radios, tape recorders cassette players, personal stereos, calculators and electronics games offer the ability to be powered from MAINS power.

There are four things you need to know to replace your AC/DC Adaptor:

1. Output Voltage and milli-Amps
   
2. Output Polarity
   
3. Regulated (Switching) or Un-Regulated (non-switching) Output
   
4. Output plug size
   
   

1) Output Voltage and milli-Amps

Usually the volts and milli-Amps (mA) are printed on the original adaptor, and often also on the device that uses the adaptor.

Choose a voltage equal or lower than required
Choose milli-Amps equal or higher than required

2) Output Polarity

This applies only to adaptors that convert AC to DC. The AC to DC adaptors will have a negative centre or a positive centre. To determine the polarity of your adaptor look for a symbol like this:



This symbol shows a positive centre. The - and + signs would be reversed for a negative centre. NEVER choose an adaptor with the wrong polarity as this can damage the equipment.

AC to AC adaptors do not have any polarity and so will not have a polarity symbol.

3) Regulated (Switching) or Un-Regulated (non-switching) Output

Most AC adaptors are un-regulated, meaning that they do not have any way to cause the output voltage to remain constant. Most electronic equipment have internal circuitry to deal with this.

Some electronic equipment such as digital cameras or security cameras are very sensitive to the input voltage and so require a Regulated (otherwise known as switching) AC adaptor. A regulated AC adaptor guarantees that the output voltage will always be constant.

A regulated adapter can be used in placed of an un-regulated adaptor. However NEVER replace a regulated adaptor with an un-regulated adaptor as this may damage the equipment.

4) Output plug size

There are hundreds of different applications that use mains adaptors and you will note that there are a number of different output plugs. We offer a range of universal adaptors each supplied with a range of Jack Plugs that should fit most of the applications. A plug size of 2.1 x 5.5mm means that the inner diameter is 2.1mm and the outer diameter is 5.5mm.

We offer the following products

Uniross UNI303R AC/DC regulated Universal mains adaptor with an input range of 3-12 volts. Rated at 300 milli-Amps.

Uniross UNI505R AC/DC regulated Universal mains adaptor with an input range of 3-12 volts. Rated at 500 milli-Amps.

Uniross AD101704 AC/DC regulated Universal mains adaptor with an input range of 3-12 volts. Rated at 800 milli-Amps.

Uniross AD100942 AC/DC regulated Universal mains adaptor with an input range of 3-12 volts. Rated at 1250 milli-Amps.

Uniross AD101708 AC/DC regulated Universal mains adaptor with an input range of 3-7 volts. Rated at 2500 milli-Amps. ~~~15102~15109~~