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Hi, i am searching for some circuit, which - if current is lets say 5A - will blink a led. No matter on what voltage, 30 - 300V will be there.
And also, i am searching for "kick on" schematics for tesla coil. My basic principle was this - lets say resistors were 1k, caps 220n, and gate is 74HC132 (schmit nand). The diode is LED (i did not find proper one) Idea is - on both inputs will be different logist at the same time, so when on first log1, on second is log 0. Well, at frequency around 300-500khz, capacitors would be nearly always charged, that means on output would be lets say log 0. (1*1 = 1, Nand it and its 0) If a frequency stops, there will be still different signals in inputs, but one capacitor will get discharged so on output would be 1*0=0, nand it and its 1.
Well, in real world it worked only when powering it on, and never changed, am i missing something? I dont want to add bigger capacitance, because i want it as fast as possible - to "kick on" tesla coil antenna feedback. I dont like idea of 555 messing with it always, this will mess with signal only when it stops.
Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
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Posts: 1546
dingo 27 wrote Hi, i am searching for some circuit, which - if current is lets say 5A - will blink a led. No matter on what voltage, 30 - 300V will be there.
Find a 1/2 ohm 10 watt resistor and connect a blinker led Across it. Connect this in series with you 30-300 volt supply. It will blink if there is 5 amps flowing.
Are the signals AC or DC at the inputs of the kick-on circuit. Ac cant charge the capacitors. Try a diode in series with each capacitor and also connect a resistor to ground after each diode.
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Overcurrent signalisation + Kick-on circuits help
