Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
dear frends,
im doing this project at present..i've taken the load as an l.e.d and gave 2 volts as supply..is it right or wrong?if wrong what is the correct procedure..coz v r not finding any relation b/w the complete circuit and the load..plz help me out
A LED has a recommended current that you must use. If the current is too low then the LED will be dim. If the current is too high then the LED will burn out. A resistor is series with the LED will limit the current but it must be calculated correctly. The calculation is simple.
An LED with its series current-limiting resistor needs a supply voltage higher than the LED needs. The voltage required by an LED depends on its color. An infrared LED needs about 1.2V, a red LED needs about 1.8V and a white or blue LED requires about 3.3V. Add at least 1V for the resistor voltage.
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