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scanf take alot of program memory. I need to find an alternative to scanf. I need to read two numbers from seial port, add them and present the result. As an example, I had the same problem with printf and at last found this code example: void send_serial(unsigned char *s) {while(*s != 0x0)...

I have a question regarding capacitors in general. Theoretically a capacitor consists of two metal plates in parallell. In the ideal case where there is vaccum between the plates there should be infinite resistance between the two plate. I am trying to make a capacitor with two aluminium foil...

Hi I am looking for a large cooling fan from some large truck engine. It doesn't matter which model. The largest I have seen is around 16 inches in diameter, but I need something around 30-40 inches. I need something like this: http://www.arrowprop.com/comp.html But these are very expensive...

Does anyone know of a alternative compiler for AT892051.

THe reason I am doing it in C is simply because I want learn the language. IRstuff : "By what test did you determine that the header files were at fault?". Tom: I eliminating the lines. IRstuff : "If they really are, there should be a means of linking only the functions you're actually...

correction: I meant #include <stdio.h> #include <AT892051.h>

I am trying to program an atmel AT89C2051. As you might know it has a capacity of 2K. Now the program itself is only a few lines. But when I compile it, a hex file is produced that is 3.2K. So I get an error message. The large file is because of to lines in the program: #import<file1.h>...

Try IGUANALABS.COM. They have an excellent programmer capable of progrmming atmel 89c2051 and some other chips. Cheers Tom

Hi Does anybody know about a calculator that Takes: Number of blades, Rotor diameter, Blade chord, Blade weight, Aerodyn Pitch, and claculate the profile drag of the propeller blade? much like http://www.icon.fi/~jtki/gyrocomp.html avialable at...

Hi Greg, Here is an example of the spec I get from the producer. Specification Nominal voltage 30 V Operating voltage range 14.4 ... 36 V No-load speed 6300 RPM / Volt 210 No. of winds 7 Current drain atmaximum efficiency* 25  50 A Max. efficiency without gearbox 91% Permissible motor...

Hello The lift equation for airplane's wing is: L=(1/2)*ro*S*CL*V^2 In the case of a rotating wing the mean lift of an untwisted rotor is in actual fact 1/3 the maximum lift at the tip because the lift profile is a parabolic curve. Thus the lift of a fixed wing becomes modified to lift of...