That is a; "wattles dropper" circuit which violates the terms of this forum - no isolating transformer and most of the circuit live. you shouldn't mess with it unless you really know what you're doing!!!i have this simple led circuit which i need to run only with mains supply, i removed the battery and plugged in suddenly the led was dead, i want to know whether batteries are working as voltage regulators and also if i remove the battery what will be the resistor i need to add series to main led.View attachment 143203
i have this simple led circuit which i need to run only with mains supply, i removed the battery and plugged in suddenly the led was dead, i want to know whether batteries are working as voltage regulators and also if i remove the battery what will be the resistor i need to add series to main led.View attachment 143203
A lot of people ridiculed the idea of a solar powered flashlight - apparently oblivious to the fact solar power can charge the battery for when there isn't any.Why on earth do you want to run your flashlight form the mains? You would be defeating the whole idea of a flashlight. Just use a lamp for Pete's sake!
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Or maybe not. There are plenty of people that come here that already have a solution that are looking for a problem.Why the TS wants to do away with the battery is anyone's guess, I cant think of any way it would be better - but the TS seems to know different.
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