How to make 220v AC LED indicator
Generally we have seen that there are all indicators in our house on the wall switch board are of neon bulb which is small in size and connects with 68k resistor in series. You can make an indicator that glows very nice and looking so cool using LED and make LED indicator for mains. LED indicator has more lasting than other . Here I am describing the LED Indicator circuit that can be used with For 230v – 240v AC Mains.
LED indicator has advantage of this is available at various color range, no any extra covering glass is needed to change the color and protection. If you need to use bi color or tricolor LED (two or three color) , then no any external circuit needed because led has in built with these property. It has more lasting than other .
LED light glow more bright and more looking beautiful than neon bulb . But There is a problem with led is to this works only with DC power, not with AC. If i connects it with AC power with resistor . We see that LED has negilible glowing.
If we connect a rectifier after the resistor with the anode point of led and ground directly with cathode then proper and sufficient brightness produce as indicator.
A 68kΩ or 100kΩ resistor is directly connected to Ac line(+) terminal to reduce the signal suitable for LED, after Resistor a rectifier diode must be connected in series with resistor to make AC signal into dc and then it connects to LED positive terminal. Negative pin of LED directly connected with AC ground. If you want to make more light glowing of LED then a 50KΩ resistor is connected at the place of 100kΩ resistor . .
Please careful with when connecting the terminal of diode and led. If connecting with wrong way or opposite then indicator will not work. Use 1N4007 diode. Following is the connection diagram of LED indicator with 230v AC.
NOTE – Please don’t touch any part of circuit when testing. It is dangerous .
Connection diagram of LED indicator for 230 v ac .
Here is an another LED power indicator circuit diagram which can connect with any 220-230v AC line.
This circuit is more reliable than 1st .
Resistor of 1 W rating recommended
Buy 1N4007 diode – https://amzn.to/2UrkaGZ
Buy Resistors (Mixed value) – https://amzn.to/2OvAra4
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Very useful circuit. I replaced all indicator with LED with the help of your circuit diagram, and they are working fine. Thanks for the circuit diagram. At your website (www.circuitspedia.com) all circuit diagram is very useful.
WHAT IS THE WATTAGE OF THE RESISTOR USED ? In order to lessen the heat generated whether a higher range of resistance can opt ? 130 K 5W ?
No need to 5W Resistor. A little bit Heat produce when i was tested. 1/4 W to 1 W is enough for this.
Sir can you provide 33k, 1/2 watt registers and diode IN 4007 on payment basis?
You can buy this from online
Diode https://amzn.to/2UrkaGZ
Resistors https://amzn.to/2OvAra4
Hi, could u pls explain how the second circuit is more reliable?? infact it uses 2 diodes in series. What change it makes?
Very well explained. How about a 120v mains? Thank you.
Hi very nice one! I have a question, why 2 diodes are better for this half wave rectifier?
Greetings;
Re “How to make 220v AC LED indicator”
The second circuit using two 1N4007 diodes, can I ask as to how the resistor value of 33K has been calculated/obtained?
Volts drop for 2x 1N4007 = 2.2v
Volts drop for typical red LED = 2.0v – current rating 20ma (0.02A)
AC voltage 220v, minus both above (4.6v) = 215.4
215.4 /0.02 = 10770 ohms
The above resistor value is approx a third of the resistor you value stipulated (33K), – or have I missed something obvious?
Please advise
You are absolutely right, i agree with you. But in practically with resistor of 10K, resistor tempereature is high within some duration. There is two main reason to use 33K resistor (only with red and blue)- Very Less power consumption because i assume that indicator is always ON with mains supply, Indicator life and protection.
If you want more brightness of LED You can use minimum 18-22k resistor safely.
I asked a valid question yesterday regarding the second LED circuit working off 220V AC, containing two 1N4007 diodes, a red LED and a 33K resistor, I.e. how was the 33k value calculated?
Thank you for ignoring my request by not showing same on your website – nice to know that help is on hand! What is the point of asking for comments if you can’t be bothered to respond?
You can use 22k ohms resistor. When i tested with lower value than 22K, the resistor get hot within some duration, so i kept The value of resistor is 33K (approximate) with commonly used RED and BLUE LEDs with 220-230v AC supply. with 33k Resistor LED glowing and visible and power consumptions is very less. You can calculate the resistor value by using Ohms law.