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Hello guys, Thank you for your suggestions!!! @itsmoked I'm trying to build one circuit base on your response. I am still a rookie but I will try my best! Thank you! I will try to update later. @Skogsgurra Actually, I am not sure about it. I just want this circuit can shut down a switch...

Hello Skogsgurra, 1. Usually, the input current is less than 2A but I will say it need to at least handle 4A to 5A. 2. No, only the generator. 3. I think few microseconds should be fine. 4. Yes, I think 75-80V is good enough. Thank you for help.

Hello everyone, I have designed a circuit that the input range is 8V to 100V and our input source varies according to spinning speed of a generator. I am looking for a chip or a circuit that can simply control a switching MOSFET. When input is over 100V, the chip will shut down the MOSFET and...

To MacGyverS2000: I am trying my best to finish my job. I know these might be a simple question for you but I am lack of experience and have no other partner can discuss with. I know how to choose a proper capacitor if the source is very stable. However, my situation is different. The...

It's still a roller coaster car. to Skogsgurra: Yes, I'd like to try your way but can you give me more information about Arduino? They have many different product. which one is best for my application? Thanks a lot!

hello guys, Thank you for all your ideas. What I really want to do is: "I want to measure speed of cars". haha. or put hall effect sensor into wheels and measure frequency or RPM and transmit data remotely to me.

Hello guys, I want to design a speed sensor which can sense the speed of a roller coaster and put the circuit on the track. Then, the circuit can transmit signals to a monitor that is about 100m away form the sensor to show the speed of the roller coaster. Is there anyone know how to design...

Yes, the power and voltage will change due to different RPM. Our generator is 3 phase 12 coils and 16 magnets. How to calculate C in this case. Do I use the parameters of maximum RPM to calculate the C? and how about the voltage of capacitor? how to choose the right value? If the maximum...

I am working on connecting a bridge rectifier and a capacitor to my AC 3 phase generator to get a DC power with small voltage ripple. But, I don't know how to choose a correct capacitor. Is there anyone can share some information about how to choose a right capacitor to me? My generator is...

Hello guys, I have a problem about Radial Flux Dynamo. Here is the Question: Circuit board dimensions Outside diameter 8.00 inches Center hole 3.00 inches Wheel OD 9.5 inches Permeant magnets 1 X 2 X .25 thick and has 2500 Surface Gauss Power needed for 2 bulbs, 60 Watts each...