https://circuitscheme.com/led-indicator-for-220v-ac-mains.html Electroni Schematic and PCB Design Sat, 29 Jul 2023 12:05:32 +0000 hourly 1 https://circuitscheme.com/led-indicator-for-220v-ac-mains.html#comment-283246 Sat, 29 Jul 2023 12:05:32 +0000 http://circuitscheme.com/?p=3440#comment-283246 Pleasde note that:
1. R1 must be rated for over 320V to survive peak mains voltage – thus usually needs a half watt resisitor or above.
2. R2 limits the inrush current at switch-on so that the rectifier diode bridge is not over loaded. It must also be rated for full peak mains pulse but does not need to be of a high wattage
3. C1 must be of the “X2” type so that it fails gracefully i.e.open circuits when overstressed.
4. The bridge rectifier diode can be quite small e.g. 1N4148 as ther only pass the LED current except at switch-on.

]]> https://circuitscheme.com/led-indicator-for-220v-ac-mains.html#comment-207439 Wed, 25 Nov 2015 15:23:18 +0000 http://circuitscheme.com/?p=3440#comment-207439 I want to use this circuit on a 12v system

]]> https://circuitscheme.com/led-indicator-for-220v-ac-mains.html#comment-206271 Thu, 12 Nov 2015 15:35:53 +0000 http://circuitscheme.com/?p=3440#comment-206271 Am impressed with those cct diagrams.I”ll start building some of them.

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