Since 2003 the Qucs Development Team, and other authors, have. The second Qucs document, called Qucs-S-Help, introduces more advanced simulation and modelling topics. Here, the input voltage can be anywhere between 9V-25V, and the output voltage can be adjusted using the value of resistance R1 and R2. The first of these, simply called Qucs-Help, provides introductory information for beginners and indeed any other users, who require help in starting to use Qucs. This IC can also act as an adjustable output voltage regulator, meaning you can also control the output voltage for your desired value using the below circuit. Also they should be of ceramic type, since ceramic capacitors are faster than electrolytic. These capacitors should be placed close to the terminals for them to work effectively. The input capacitor 0.33uF is a ceramic capacitor that deals with input inductance problem and the output capacitor 0.1uF is also a ceramic capacitor that adds to the stability of the circuit. We just need two capacitors of vale 33uf and 0.1uf to get this IC working. Data given: V S 36 volts, R 1 6k, R 2 12k and R 3 18k Voltage Dividers Circuit The voltage drops across all three resistors should add up to the supply voltage as defined by Kirchhoff’s Voltage Law (KVL). This is a typical application circuit of the 7805 IC. Calculate, the total resistance, the value of the current flowing around the circuit, and the voltage drops across each resistor. For example if the input voltage is 12V and you are consuming 1A, then (12-5) * 1 = 7W. But, the IC suffers from heavy heat loss hence a Heat sink is recommended for projects that consume more current. The output current of this IC can go up to 1.5A. So our 7805 will provide a +5V output voltage. The name 7805 signifies two meaning, “78” means that it is a positive voltage regulator and “05” means that it provides 5V as output. In our case the 7805 IC is an iconic regulator IC that finds its application in most of the projects. They provide a constant output voltage for a varied input voltage. Voltage regulators are very common in electronic circuits. Note: Complete Technical Details can be found at the 7805 datasheet given at the end of this page. Junction Temperature maximum 125 degree Celsius.Internal Thermal Overload and Short circuit current limiting protection is available.It provides a constant +5V output voltage for a variable input voltage supply. The 7805 Voltage Regulator IC is a commonly used voltage regulator that finds its application in most of the electronics projects.
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