I got my hands a traffic light, in which there is a driver for the LEDs. Here's a pic: http://i46.tinypic.com/1z19vgw.jpg
I looks very much like a switch mode powersupply. At the lower part of the board, there's an IRF820 - a quick search: 2.5A, 500V, 3.000 Ohm, N-Channel Power MOSFET
I meassured the voltage at that component, and.. 460V AC.. wauw.
My question is: Why turn 230V into 460V - whats the big idea behind that?
Also.. when i disconnected the load, and turned it on again, something went up in smoke after just a few seconds :/
(For those interested, heres the board with the red LEDs: http://i50.tinypic.com/24o1478.jpg )
I looks very much like a switch mode powersupply. At the lower part of the board, there's an IRF820 - a quick search: 2.5A, 500V, 3.000 Ohm, N-Channel Power MOSFET
I meassured the voltage at that component, and.. 460V AC.. wauw.
My question is: Why turn 230V into 460V - whats the big idea behind that?
Also.. when i disconnected the load, and turned it on again, something went up in smoke after just a few seconds :/
(For those interested, heres the board with the red LEDs: http://i50.tinypic.com/24o1478.jpg )
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