A power supply provides the necessary electrical energy to make circuits come to life. Think of it as the heart that steadily pumps the lifeblood of electrons into your circuits, enabling them to perform various tasks and functions.
The term "power supply" encompasses a diverse array of devices that can consistently provide electrical energy to an electrical load within a defined time frame, irrespective of whether it's AC or DC, high-powered or low-powered. In the context of this tutorial, we focus exclusively on DC-type power supplies, which, through adjustable settings, can provide a consistent and regulated voltage of up to 30V, ensuring safety for human users.
Laboratory power supply
This is a common DCpower supply frequently found in electronics labs. These power supplies are typically tailored to fulfill the precise power needs of the connected load. Unlike more economical dry batteries, power supplies are engineered with additional beneficial attributes like voltage stabilization, current control, and safeguards against short circuits. Consequently, they prove to be more advantageous for circuit experiments and laboratory tasks.
In situations where space is constrained, setting up rapid circuit experiments at home or in a classroom might not be very practical with bulkier bench-top power supplies. These larger units can occupy significant space and prove challenging to maneuver or store. Therefore for applications that do not require precise voltage or high output power, we can use some alternatives such as dry batteries.
Dry batteries and battery cases
If you are circuiting on breadboards (check out another package called: Basic Electric Circuits), you may find this rechargeable breadboard power supply, as shown in Figure xx being particularly useful and handy. This power supply was invented by EIM Technology which is able to generate adjustable DC voltage from 4V to 24V, with a precise readout display and short circuit protection mechanism.