The motto of an efficient and high quality variable dc power supply should read as follows, ‘Get power whenever you need it’. From the above mentioned motto itself, it becomes quite clear, that a variable dc power supply is here to stay.
A variable dc power supply is suitable for many applications, some of the more common ones being, telecommunication equipment use, bench testing, field service, etc. There are a whole lot of features which can be incorporated into a variable dc power supply, and some of the standard features, which form a part of many a variable dc power supply include, adjustable voltage and current output, overload and short circuit protection, binding post terminals for variable supply, analog and or digital display, etc.
Many of the variable dc power supplies available in the market sport an all metal case, and are fully regulated and short protected. A very potent example of a user friendly variable dc power supply, is the ‘3 Amp Variable DC Power Supply’. The above mentioned power supply provides 3 amps current at 3-30 Volts DC, and reduces ripple voltage to a bare minimum. This particular power supply is a good choice for automotive projects. Some of the products, which fall within the ambit of a variable dc power supply, boast of 4 DC voltages, which are incorporated within the given variable dc power supply, and of which, one is variable in nature. These relatively low cost products are high on value, and are ideal for someone pursuing a hobby. Besides hobbyists, service shops and laboratories too, have much to gain, from this type of a variable dc power supply.
The ‘Get power whenever you need it’ factor, works in favor of a variable dc power supply, and it will not be wrong to say, that a variable dc power supply, is useful in more than ways.