computoman

PC oscilloscope or how to save yourself hundreds of dollars before you buy an oscilloscope. Sometimes when I build simple ttl (Transistor–transistor logic) circuits I like to see the results of the output. An example would be the pwm (Pulse-width modulation) that might control a robot motor. I do not have the money to buy an oscilloscope. so I am using this project to fulfill those needs. Note I am assuming you know how to use this set up. If you are not sure, please get a professional to help. If you are unfamiliar with electronics do not do this without help of a professional. Improper probes could destroy your computer, what is connected to your computer, and as well as not be safe. Step 1: Input probe. You may want to build this input probe from the first diagram. http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search is a good place to go to get equivalent part numbers.  Also included are other...

Math can be interesting! This is oversimplified, but we can use math for many things. One is that might want to know the position of a motor. In electronics, we might want to know what part of an AC cycle we are in such as reading oscilloscopes. . What is even more interesting, we do not have to have some fancy computer language in most cases to calculate what we need.  Then if you want to, you can port the code to a fancier language and or system.  Sine wave graph $ ./sine  [code]  cat sine.bas 'rem  ---------------------------- 'rem sine wave 'rem ----------------------------- ? ?"Sine wave graph" ? ? ?tab(14);"- 1";tab(40);"0";tab(63);"+ 1" ?"Degrees";tab(14); for j = 1 to 52     ?"-"; Next j ? for L = 0 to 360 step 7.5     let x =  L / 57.19578     'rem what makes the curve     let r = sin(x)     let s = int((r*25) + .5)     ...