Recent content by Emicro

This is for the circuit analysis purposes. In real life, very rarely does anyone put batteries in a circuit in opposition to each other.

One of the things that I learned in college, is << illegal activity info deleted by berkeman >>

Think of it like this, it's like standing on a pencil that is stood on it's end.

When I was in college, one of my professors was Wayne Thomasi. He wrote a book that is easy to understand and has some very advanced explinations. The name of the book is Electronic Communications Systems: Fundamentals Through Advanced. Its a bit pricey, but I still use mine.

A good rule of thumb is to use a rheostat that is rated for at least 1.5 time the wattage that you are going to use. In this case that would be 110 V, 600 watt. But if heat is a big concern you could even use an 800 watt rheostat. It will be more expensive, but it will probably be worth it.

I would like to know why waste to energy plants are not more popular. During the early 90's I toured a powerplant just outside of Spokane, Washington that uses refuse exclusively as a fuel source, instead of sending it to a landfill. This seems like a better idea that dumping all that garbage in...

What do you mean by EMC? There are a number of ways to deal electromagnetic radiation. Shielding is probably the cheapest, and the easiest to implement. By shielding I mean a faraday cage that encompasses the case. Another way of dealing with EM radiation is an active field cancelling system...

The problem that you are going to have with someone responding to your request, is that you are messing with a safety system on a vehicle. There is not only a liability issues, but also a moral issues. If you want to do the math yourself it is very straight forward. What you are trying to do is...

You could use an inverting op-amp to invert the control signal between the comparator and T2. If you are using a comparator as the input though, you may want to use an asycronous J-K flip flop between the comparator and the two transistors as this will not cause a propagation delay in the...

What is the reasoning for changing the hardware?

In order to find the amount of current required you should use ohms law. Ohms law states that I (current) X Resistance (ohms) = Voltage. You know that you are going to be using 12 Volts. I assume that you are going to be using 4 ohm speakers. If you use two of them, that will be 8 ohms. Which...

First in order to use a cap to make a squarewave, you would have to rectify the AC and make it DC. Secondly, a squarewave is the addition of the harmonics of a sinewave. That means that a squarewave will have a lot more power than a sinewave of equal amplitude and frequency. But I believe the...

You can also move the small throttle linkage on the side of the carburator, that will stop the engine by starving the engine of gas. Its not as safe as a kill switch, but it is a lot easier than installing a new switch. If you move the linkage one way and the engine revs up, move it the other...

I have been stung by electricity many times, I have even been hit by 3 kV and have never had any lasting effects. I think that Integral is correct in his assumption that what ever hurt you, it wasn't your meter.

You are correct on both points. My point was that 250 mA is 250 mA no matter what resistance it goes through.