230 Volts LED and schema -- project 2

A LED circuit I have used over the last 25 years, with basically no faillures in the LED or other components.

I use this for ON - OFF indicating puroposes on mains circuits, indicator lights etc.

Firstly Safety ! This is a mains operated circuit, so during building , and experimenting, ensure that the power is switched off, unplugged from the socket and tested to the LED under test, when touching any wires.

Category:

Science & Technology

Tags:

• LED
• 230
• Volts
• mains
• indicator
• pilot
• light
• project

[McGuywer]

R1 and D1 are unnecessary.

But more importantly, the efficiency of this circuit is very low, probably less than 1%, due to the resistive ballast.

I'm using capacitive ballast in quite a few led indicators mounted in wall switches in my house. The circuit is a bit more complicated, as to avoid surge current through the LED at power-on. But power consumption is also much lower.

[RODALCO2007]

@McGuywer Yes, can be done but is a lot bigger and spikes can still kill the led.

This is very compact and can be fitted easily.

Most newer led's are very bright with 1 or 2 mA so less power is wasted in series R's.

[RODALCO2007]

@ledbeginer 2 resistors of 18 or 22 kilo ohms 1 Watt in series.

diode 1 N4007

reverse diode 1 N914 or 1N4148 ( not critical) protect the led.

led, colour of your choice.