Recent content by m718

Which of these have higher output per square unit*, phototransistors, photodiodes or APD photodiodes.?

I'm using it to generate electrostatic like when you touch a car and get a small shock. Power needs to be very small like the natural electrostatic so that shouldn't be a problem.

I will look into those they look exactly like what I need but since they are used for camera flash I wonder if they can operate continuously.

A sine wave generator circuit before the transformer For the dc and the power output about 10 microwatt. What is the difference between a flyback and a forward converter?. What ever type of transformer doesn't matter the only thing is it must be in .5 cm2 and 1:30 ratio or higher.

How small can I make a transformer and still get 1:30 or preferably higher step-up ratio ? I have been reading a lot about transformers and I know using higher frequency will reduce the size, and I need to use ferrite core for high frequency. I don't want to use really high frequency, probably...

What are the current levels in those shock you get by touching a car sometimes, it must be near 5000 volts or more and they are safe. Would it be safer if I used a transformer to step up the voltage?.

I will use voltage multiplier to get the high voltage, are the capacitors in the multiplier safe or are those the capacitance your talking about?

Is 5000 volts at 1mA safe if accidentally touched, if so, up to how many mA is safe at this voltage?

What kind of circuit do I have to connect to my opamp output to get the logarithmic scale? I basically want the output I get on the computer soundcard db meter except without using the soundcard, an analog circuit that I can just connect to my opamp output, and 7 segment display for the db level.

I checked again I had it wrong its the other way around and its about .3db difference not .5. So how come this voltage difference can't be seen with my multimeter? is it the meter?

How would I make a db meter like this but without software and using computer sound card, just an analog circuit with seven segment leds to show db level? the software name is visual analyzer 8 if you need to see it.

The db depends on the mic input sensitivity but with loud speaker 300mV its -9.6 db with other speaker at 6 mV ON it goes up to -10.1 db

I have one of those soundcard spectrum analyzers its called VA it has a db meter. My question is what is the db meter measuring, just the voltage applied to the mic input? if so is it measuring the RMS or PEAK voltage? because unlike the ac voltmeter I was using before this db meter shows...

maybe its my test equipment I will measure the output another way and see what happens

I did a new test and it doesn't even have to be 600mV, the 6 mV signal can't be seen even with a 30 mV background signal.