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Voltage regulators are very common in electronic circuits. They provide a constant output voltage for a varied input voltage. In our case, the 7809 IC is an iconic regulator IC that finds its application in most of the projects. The name 7809 signifies two meaning, “78” means that it is a positive voltage regulator and “09” means that it provides 9V as output. So our 7809 will provide a +9V output voltage.
The output current of this IC can go up to 1.5A. But, the IC suffers from heavy heat loss hence a Heatsink is recommended for projects that consume more current. For example, if the input voltage is 15V and you are consuming 1A, then (15-9) * 1 = 6W. This 6 Watts will be dissipated as heat.
|Pin Number||Pin Name||Description|
|1||Input (V+)||Unregulated Input Voltage|
|2||Ground (Gnd)||Connected it to Ground|
|3||Output (Vo)||Outputs Regulated +9V|
1 x 7809 9V Voltage regulator
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