| Electronics > Beginners |
| measuring CFL voltage |
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| Gyro:
--- Quote from: edavid on September 19, 2018, 06:47:01 pm ---CCFL backlight tubes and inverters are very different from CFL light bulbs. This app note and warnings are not relevant to OP's question. --- End quote --- Doh, I misread and missed the absence of the extra 'C'. |
| wraper:
--- Quote from: edavid on September 19, 2018, 06:47:01 pm ---CCFL backlight tubes and inverters are very different from CFL light bulbs. This app note and warnings are not relevant to OP's question. --- End quote --- If you read it, that app note does mention hot cathode fluorescent lamps. Also as I previously said when there is no lamp or lamp is damaged, peak voltage can go up a lot. |
| Pirateguy:
speaking of beginner threads, i would really appreciate it if you guys could stop comparing penis size for 2 seconds and maybe answer 1 or 2 of my questions? --- Quote ---could i use one of these circuits to power a small tesla coil? --- End quote --- --- Quote ---i wonder, in this context, would a plasma arc be considered a load? --- End quote --- --- Quote ---and what about coils? could i wirelessly measure the frequency? --- End quote --- --- Quote ---would a diy high voltage probe work? (the ones where u multiply the internal resistance of the meter) --- End quote --- |
| TheNewLab:
interesting. 1.) regarding a tesla coil, I would look at info on DIYing a tesla coil first. I suspect Tesla coils use much higher frequency. 2.) I know nothing about plasma arc..duck duck DIY plasma arc? or DIY plasma arc? or what's the frequency of plasma arc? 3.) coils, like clamp meters and hall effect are designed for measuring high currents - I would look into TV repair methods that have KV levels of voltage. 4.) DIY HV probes are a mixed bag. I am sure plenty of people. likely much more experienced than I would say nothing except a quality built HV prove. However, I have seen instructions on how to make two types of DIY HV probes from Delton Horn repair book How to Repair Almost Anything It's old..Homer Davidson was big on HV probes for TV repair too. For me...it is all about keeping a distance...say 3 or 4 foot long pole on the probe, in case the DIY probe flashes over. Please, note that I am a hobbyist, not a pro.. I am sharing how I would approach it...listen to anyone more knowledgeable than me FIRST!. Thanks for posting this question |
| Pirateguy:
thanks for the reply :) 1: i did look around and played with this java calculator. turns out small coils like the one i had in mind 300-600 turns will run at hundreds of khz, but a larger size coil with more windings will resonated at a lower frequency. 2: with plasma arc i just mean the spark u can make with high voltage. like a jacob's ladder, would that act as a load and make the voltage drop? 3: i was thinking only of measuring frequency this way. if i just rig up 2 coils, one to transmit and one as an antenna, i'd imagine i can get some sort of signal, and the frequency at least should not be effected by reception quality. 4: well i suppose i can just test it out with a cheap meter. i wasn't planning on measuring high current anyway. based on some tutorial videos i watched, i measured the internal resistance of several meters and all are 1 meg and so a 99meg resistor array should give me a 100x factor. should be enough for the cfl circuit, but i suppose i could rig up a spark gap for extra safety. |
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